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MS16-107 - Critical: Security Update for Microsoft Office (3185852) - Version: 2.0

Microsoft Security Notifications - Thu, 09/22/2016 - 09:00
Severity Rating: Critical
Revision Note: V2.0 (September 22, 2016): Bulletin revised to announce the availability of the 14.6.8 update for Microsoft Office for Mac 2011 (3186805) and the 15.25 update for Microsoft Office 2016 for Mac (3186807). Customers running affected Mac software should install the appropriate update for their product to be protected from the vulnerabilities discussed in this bulletin. Customers running other Microsoft Office software do not need to take any action. See Microsoft Knowledge Base Article 3186805 and Microsoft Knowledge Base Article 3186807 for more information and download links.
Summary: This security update resolves vulnerabilities in Microsoft Office. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted Microsoft Office file. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.
Categories: Security Alerts

MS16-116 - Critical: Security Update in OLE Automation for VBScript Scripting Engine (3188724) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Critical
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if an attacker successfully convinces a user of an affected system to visit a malicious or compromised website. Note that you must install two updates to be protected from the vulnerability discussed in this bulletin: The update in this bulletin, MS16-116, and the update in MS16-104.
Categories: Security Alerts

MS16-108 - Critical: Security Update for Microsoft Exchange Server (3185883) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Critical
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Exchange Server. The most severe of the vulnerabilities could allow remote code execution in some Oracle Outside In libraries that are built into Exchange Server if an attacker sends an email with a specially crafted attachment to a vulnerable Exchange server.
Categories: Security Alerts

MS16-114 - Important: Security Update for Windows SMBv1 Server (3185879) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Important
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. On Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 operating systems, the vulnerability could allow remote code execution if an authenticated attacker sends specially crafted packets to an affected Microsoft Server Message Block 1.0 (SMBv1) Server. The vulnerability does not impact other SMB Server versions. Although later operating systems are affected, the potential impact is denial of service.
Categories: Security Alerts

MS16-106 - Critical: Security Update for Microsoft Graphics Component (3185848) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Critical
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Windows. The vulnerabilities could allow remote code execution if a user either visits a specially crafted website or opens a specially crafted document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Categories: Security Alerts

MS16-115 - Important: Security Update for Microsoft Windows PDF Library (3188733) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Important
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Windows. The vulnerabilities could allow information disclosure if a user views specially crafted PDF content online or opens a specially crafted PDF document.
Categories: Security Alerts

MS16-105 - Critical: Cumulative Security Update for Microsoft Edge (3183043) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Critical
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Edge. The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Microsoft Edge. An attacker who successfully exploited the vulnerabilities could gain the same user rights as the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than users with administrative user rights.
Categories: Security Alerts

MS16-104 - Critical: Cumulative Security Update for Internet Explorer (3183038) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Critical
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Internet Explorer. The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited the vulnerabilities could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Categories: Security Alerts

MS16-117 - Critical: Security Update for Adobe Flash Player (3188128) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Critical
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Adobe Flash Player when installed on all supported editions of Windows 8.1, Windows Server 2012, Windows Server 2012 R2, Windows RT 8.1, and Windows 10.
Categories: Security Alerts

MS16-112 - Important: Security Update for Windows Lock Screen (3178469) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Important
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if Windows improperly allows web content to load from the Windows lock screen.
Categories: Security Alerts

MS16-109 - Important: Security Update for Silverlight (3182373) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Important
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Silverlight. The vulnerability could allow remote code execution if a user visits a compromised website that contains a specially crafted Silverlight application. An attacker would have no way to force a user to visit a compromised website. Instead, an attacker would have to convince the user to visit the website, typically by enticing the user to click a link in either an email or instant message that takes the user to the attacker's website.
Categories: Security Alerts

MS16-111 - Important: Security Update for Windows Kernel (3186973) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Important
Revision Note: V1.0 (September 13, 2016): Click here to enter text.
Summary: This security update resolves vulnerabilities in Microsoft Windows. The vulnerabilities could allow elevation of privilege if an attacker runs a specially crafted application on a target system.
Categories: Security Alerts

MS16-110 - Important: Security Update for Microsoft Windows (3178467) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Important
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves multiple vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if an attacker creates a specially crafted request and executes arbitrary code with elevated permissions on a target system.
Categories: Security Alerts

MS16-113 - Important: Security Update for Windows Secure Kernel Mode (3185876) - Version: 1.0

Microsoft Security Notifications - Tue, 09/13/2016 - 09:00
Severity Rating: Important
Revision Note: V1.0 (September 13, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow information disclosure when Windows Secure Kernel Mode improperly handles objects in memory.
Categories: Security Alerts

TA16-250A: The Increasing Threat to Network Infrastructure Devices and Recommended Mitigations

US-CERT Security Alerts - Tue, 09/06/2016 - 14:29
Original release date: September 06, 2016 | Last revised: September 28, 2016
Systems Affected

Network Infrastructure Devices
 

Overview

The advancing capabilities of organized hacker groups and cyber adversaries create an increasing global threat to information systems. The rising threat levels place more demands on security personnel and network administrators to protect information systems. Protecting the network infrastructure is critical to preserve the confidentiality, integrity, and availability of communication and services across an enterprise.

To address threats to network infrastructure devices, this Alert provides information on recent vectors of attack that advanced persistent threat (APT) actors are targeting, along with prevention and mitigation recommendations.
 

Description

Network infrastructure consists of interconnected devices designed to transport communications needed for data, applications, services, and multi-media. Routers and firewalls are the focus of this alert; however, many other devices exist in the network, such as switches, load-balancers, intrusion detection systems, etc. Perimeter devices, such as firewalls and intrusion detection systems, have been the traditional technologies used to secure the network, but as threats change, so must security strategies. Organizations can no longer rely on perimeter devices to protect the network from cyber intrusions; organizations must also be able to contain the impact/losses within the internal network and infrastructure.

For several years now, vulnerable network devices have been the attack-vector of choice and one of the most effective techniques for sophisticated hackers and advanced threat actors. In this environment, there has never been a greater need to improve network infrastructure security. Unlike hosts that receive significant administrative security attention and for which security tools such as anti-malware exist, network devices are often working in the background with little oversight—until network connectivity is broken or diminished. Malicious cyber actors take advantage of this fact and often target network devices. Once on the device, they can remain there undetected for long periods. After an incident, where administrators and security professionals perform forensic analysis and recover control, a malicious cyber actor with persistent access on network devices can reattack the recently cleaned hosts. For this reason, administrators need to ensure proper configuration and control of network devices.

Proliferation of Threats to Information SystemsSYNful Knock

In September 2015, an attack known as SYNful Knock was disclosed. SYNful Knock silently changes a router’s operating system image, thus allowing attackers to gain a foothold on a victim’s network. The malware can be customized and updated once embedded. When the modified malicious image is uploaded, it provides a backdoor into the victim’s network. Using a crafted TCP SYN packet, a communication channel is established between the compromised device and the malicious command and control (C2) server. The impact of this infection to a network or device is severe and most likely indicates that there may be additional backdoors or compromised devices on the network. This foothold gives an attacker the ability to maneuver and infect other hosts and access sensitive data.

The initial infection vector does not leverage a zero-day vulnerability. Attackers either use the default credentials to log into the device or obtain weak credentials from other insecure devices or communications. The implant resides within a modified IOS image and, when loaded, maintains its persistence in the environment, even after a system reboot. Any further modules loaded by the attacker will only exist in the router’s volatile memory and will not be available for use after the device reboots. However, these devices are rarely or never rebooted.

To prevent the size of the image from changing, the malware overwrites several legitimate IOS functions with its own executable code. The attacker examines the functionality of the router and determines functions that can be overwritten without causing issues on the router. Thus, the overwritten functions will vary upon deployment.

The attacker can utilize the secret backdoor password in three different authentication scenarios. In these scenarios the implant first checks to see if the user input is the backdoor password. If so, access is granted. Otherwise, the implanted code will forward the credentials for normal verification of potentially valid credentials. This generally raises the least amount of suspicion. Cisco has provided an alert on this attack vector. For more information, see the Cisco SYNful Knock Security Advisory.

Other attacks against network infrastructure devices have also been reported, including more complicated persistent malware that silently changes the firmware on the device that is used to load the operating system so that the malware can inject code into the running operating system. For more information, please see Cisco's description of the evolution of attacks on Cisco IOS devices.

Cisco Adaptive Security Appliance (ASA)

A Cisco ASA device is a network device that provides firewall and Virtual Private Network (VPN) functionality. These devices are often deployed at the edge of a network to protect a site’s network infrastructure, and to give remote users access to protected local resources.

In June 2016, NCCIC received several reports of compromised Cisco ASA devices that were modified in an unauthorized way. The ASA devices directed users to a location where malicious actors tried to socially engineer the users into divulging their credentials.

It is suspected that malicious actors leveraged CVE-2014-3393 to inject malicious code into the affected devices. The malicious actor would then be able to modify the contents of the Random Access Memory Filing System (RAMFS) cache file system and inject the malicious code into the appliance’s configuration. Refer to the Cisco Security Advisory Multiple Vulnerabilities in Cisco ASA Software for more information and for remediation details.

In August 2016, a group known as “Shadow Brokers” publicly released a large number of files, including exploitation tools for both old and newly exposed vulnerabilities. Cisco ASA devices were found to be vulnerable to the released exploit code. In response, Cisco released an update to address a newly disclosed Cisco ASA Simple Network Management Protocol (SNMP) remote code execution vulnerability (CVE-2016-6366). In addition, one exploit tool targeted a previously patched Cisco vulnerability (CVE-2016-6367). Although Cisco provided patches to fix this Cisco ASA command-line interface (CLI) remote code execution vulnerability in 2011, devices that remain unpatched are still vulnerable to the described attack. Attackers may target vulnerabilities for months or even years after patches become available.

Impact

If the network infrastructure is compromised, malicious hackers or adversaries can gain full control of the network infrastructure enabling further compromise of other types of devices and data and allowing traffic to be redirected, changed, or denied. Possibilities of manipulation include denial-of-service, data theft, or unauthorized changes to the data.

Intruders with infrastructure privilege and access can impede productivity and severely hinder re-establishing network connectivity. Even if other compromised devices are detected, tracking back to a compromised infrastructure device is often difficult.

Malicious actors with persistent access to network devices can reattack and move laterally after they have been ejected from previously exploited hosts.
 

Solution 1.    Segregate Networks and Functions

Proper network segmentation is a very effective security mechanism to prevent an intruder from propagating exploits or laterally moving around an internal network. On a poorly segmented network, intruders are able to extend their impact to control critical devices or gain access to sensitive data and intellectual property. Security architects must consider the overall infrastructure layout, segmentation, and segregation. Segregation separates network segments based on role and functionality. A securely segregated network can contain malicious occurrences, reducing the impact from intruders, in the event that they have gained a foothold somewhere inside the network.

Physical Separation of Sensitive Information

Local Area Network (LAN) segments are separated by traditional network devices such as routers. Routers are placed between networks to create boundaries, increase the number of broadcast domains, and effectively filter users’ broadcast traffic. These boundaries can be used to contain security breaches by restricting traffic to separate segments and can even shut down segments of the network during an intrusion, restricting adversary access.

Recommendations:
  • Implement Principles of Least Privilege and need-to-know when designing network segments.
  • Separate sensitive information and security requirements into network segments.
  • Apply security recommendations and secure configurations to all network segments and network layers.
Virtual Separation of Sensitive Information        

As technologies change, new strategies are developed to improve IT efficiencies and network security controls. Virtual separation is the logical isolation of networks on the same physical network. The same physical segmentation design principles apply to virtual segmentation but no additional hardware is required. Existing technologies can be used to prevent an intruder from breaching other internal network segments.

Recommendations:
  • Use Private Virtual LANs to isolate a user from the rest of the broadcast domains.
  • Use Virtual Routing and Forwarding (VRF) technology to segment network traffic over multiple routing tables simultaneously on a single router.
  • Use VPNs to securely extend a host/network by tunneling through public or private networks.

2.    Limit Unnecessary Lateral Communications

Allowing unfiltered workstation-to-workstation communications (as well as other peer-to-peer communications) creates serious vulnerabilities, and can allow a network intruder to easily spread to multiple systems. An intruder can establish an effective “beach head” within the network, and then spread to create backdoors into the network to maintain persistence and make it difficult for defenders to contain and eradicate.

Recommendations:
  • Restrict communications using host-based firewall rules to deny the flow of packets from other hosts in the network. The firewall rules can be created to filter on a host device, user, program, or IP address to limit access from services and systems.
  • Implement a VLAN Access Control List (VACL), a filter that controls access to/from VLANs. VACL filters should be created to deny packets the ability to flow to other VLANs.
  • Logically segregate the network using physical or virtual separation allowing network administrators to isolate critical devices onto network segments.
     
3.    Harden Network Devices

A fundamental way to enhance network infrastructure security is to safeguard networking devices with secure configurations. Government agencies, organizations, and vendors supply a wide range of resources to administrators on how to harden network devices. These resources include benchmarks and best practices. These recommendations should be implemented in conjunction with laws, regulations, site security policies, standards, and industry best practices. These guides provide a baseline security configuration for the enterprise that protects the integrity of network infrastructure devices. This guidance supplements the network security best practices supplied by vendors.

Recommendations:
  • Disable unencrypted remote admin protocols used to manage network infrastructure (e.g., Telnet, FTP).
  • Disable unnecessary services (e.g. discovery protocols, source routing, HTTP, SNMP, BOOTP).
  • Use SNMPv3 (or subsequent version) but do not use SNMP community strings.
  • Secure access to the console, auxiliary, and VTY lines.
  • Implement robust password policies and use the strongest password encryption available.
  • Protect router/switch by controlling access lists for remote administration.
  • Restrict physical access to routers/switches.
  • Backup configurations and store offline. Use the latest version of the network device operating system and update with all patches.
  • Periodically test security configurations against security requirements.
  • Protect configuration files with encryption and/or access controls when sending them electronically and when they are stored and backed up.
     
4.    Secure Access to Infrastructure Devices

Administrative privileges on infrastructure devices allow access to resources that are normally unavailable to most users and permit the execution of actions that would otherwise be restricted. When administrator privileges are improperly authorized, granted widely, and/or not closely audited, intruders can exploit them. These compromised privileges can enable adversaries to traverse a network, expanding access and potentially allowing full control of the infrastructure backbone. Unauthorized infrastructure access can be mitigated by properly implementing secure access policies and procedures.

Recommendations:
  • Implement Multi-Factor Authentication – Authentication is a process to validate a user’s identity. Weak authentication processes are commonly exploited by attackers. Multi-factor authentication uses at least two identity components to authenticate a user’s identity. Identity components include something the user knows (e.g., password); an object the user has possession of (e.g., token); and a trait unique to the specific person (e.g., biometric).
  • Manage Privileged Access – Use an authorization server to store access information for network device management. This type of server will enable network administrators to assign different privilege levels to users based on the principle of least privilege. When a user tries to execute an unauthorized command, it will be rejected. To increase the strength and robustness of user authentication, implement a hard token authentication server in addition to the AAA server, if possible. Multi-factor authentication increases the difficulty for intruders to steal and reuse credentials to gain access to network devices.
  • Manage Administrative Credentials – Although multi-factor authentication is highly recommended and a best practice, systems that cannot meet this requirement can at least improve their security level by changing default passwords and enforcing complex password policies. Network accounts must contain complex passwords of at least 14 characters from multiple character domains including lowercase, uppercase, numbers, and special characters. Enforce password expiration and reuse policies. If passwords are stored for emergency access, keep these in a protected off-network location, such as a safe.
     
5.    Perform Out-of-Band Management

Out-of-Band (OoB) management uses alternate communication paths to remotely manage network infrastructure devices. These dedicated paths can vary in configuration to include anything from virtual tunneling to physical separation. Using OoB access to manage the network infrastructure will strengthen security by limiting access and separating user traffic from network management traffic. OoB management provides security monitoring and can implement corrective actions without allowing the adversary who may have already compromised a portion of the network to observe these changes.

OoB management can be implemented physically or virtually, or through a hybrid of the two. Building additional physical network infrastructure is the most secure option for the network managers, although it can be very expensive to implement and maintain. Virtual implementation is less costly, but still requires significant configuration changes and administration. In some situations, such as access to remote locations, virtual encrypted tunnels may be the only viable option.

Recommendations:
  • Segregate standard network traffic from management traffic.
  • Enforce that management traffic on devices only comes from the OoB.
  • Apply encryption to all management channels.
  • Encrypt all remote access to infrastructure devices such as terminal or dial-in servers.
  • Manage all administrative functions from a dedicated host (fully patched) over a secure channel, preferably on the OoB.
  • Harden network management devices by testing patches, turning off unnecessary services on routers and switches, and enforcing strong password policies. Monitor the network and review logs Implement access controls that only permit required administrative or management services (SNMP, NTP SSH, FTP, TFTP).
     
6.    Validate Integrity of Hardware and Software

Products purchased through unauthorized channels are often known as “counterfeit,” “secondary,” or “grey market” devices. There have been numerous reports in the press regarding grey market hardware and software being introduced into the marketplace. Grey market products have not been thoroughly tested to meet quality standards and can introduce risks to the network. Lack of awareness or validation of the legitimacy of hardware and software presents a serious risk to users’ information and the overall integrity of the network environment. Products purchased from the secondary market run the risk of having the supply chain breached, which can result in the introduction of counterfeit, stolen, or second-hand devices. This could affect network performance and compromise the confidentiality, integrity, or availability of network assets. Furthermore, breaches in the supply chain provide an opportunity for malicious software or hardware to be installed on the equipment. In addition, unauthorized or malicious software can be loaded onto a device after it is in operational use, so integrity checking of software should be done on a regular basis.

Recommendations:
  • Maintain strict control of the supply chain; purchase only from authorized resellers.
  • Require resellers to implement a supply chain integrity check to validate hardware and software authenticity.
  • Inspect the device for signs of tampering.
  • Validate serial numbers from multiple sources.
  • Download software, updates, patches, and upgrades from validated sources.
  • Perform hash verification and compare values against the vendor’s database to detect unauthorized modification to the firmware.
  • Monitor and log devices, verifying network configurations of devices on a regular schedule.
  • Train network owners, administrators, and procurement personnel to increase awareness of grey market devices.

 

Shadow Broker ExploitsVendorCVEExploit NameVulnerabilityFortinetCVE-2016-6909   EGREGIOUSBLUNDERAuthentication cookie overflowWatchGuard   CVE-2016-7089ESCALATEPLOWMANCommand line injection via ipconfigCiscoCVE-2016-6366EXTRABACONSNMP remote code executionCiscoCVE-2016-6367EPICBANANACommand line injection remote code executionCiscoCVE-2016-6415BENIGNCERTAIN/PIXPOCKET   Information/memory leakTOPSECN/AELIGIBLEBACHELORAttack vector unknown, but has an XML-like payload
beginning with <?tos length="001e.%8.8x"?TOPSECN/AELIGIBLEBOMBSHELLHTTP cookie command injectionTOPSECN/AELIGIBLECANDIDATEHTTP cookie command injectionTOPSECN/AELIGIBLECONTESTANTHTTP POST parameter injection


 

References Revision History
  • September 6, 2016: Initial release
  • September 13, 2016: Added additional references

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Categories: Security Alerts

MS16-101 - Important: Security Update for Windows Authentication Methods (3178465) - Version: 1.2

Microsoft Security Notifications - Fri, 09/02/2016 - 09:00
Severity Rating: Important
Revision Note: V1.2 (September 2, 2016): Bulletin revised to correct the Mitigating Factors section for CVE-2016-3237 — Microsoft has not identified any mitigations for this vulnerability.
Summary: This security update resolves multiple vulnerabilities in Microsoft Windows. The more severe of the vulnerabilities could allow elevation of privilege if an attacker runs a specially crafted application on a domain-joined system.
Categories: Security Alerts

MS16-099 - Critical: Security Update for Microsoft Office (3177451) - Version: 2.0

Microsoft Security Notifications - Mon, 08/22/2016 - 09:00
Severity Rating: Critical
Revision Note: V2.0 (August 22, 2016): V2.0 (August 22, 2016): Bulletin revised to announce the availability of the 14.6.7 update for Microsoft Office for Mac 2011 (3179162) and the 15.25 update for Microsoft Office 2016 for Mac (3179163). Customers running affected Mac software should install the appropriate update for their product to be protected from the vulnerabilities discussed in this bulletin. Customers running other Microsoft Office software do not need to take any action. See Microsoft Knowledge Base Article 3179162 and Microsoft Knowledge Base Article 3179163 for more information and download links.
Summary: This security update resolves vulnerabilities in Microsoft Office. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted Microsoft Office file. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.
Categories: Security Alerts

MS16-075 - Important: Security Update for Windows SMB Server (3164038) - Version: 1.1

Microsoft Security Notifications - Thu, 08/18/2016 - 09:00
Severity Rating: Important
Revision Note: V1.1 (August 18, 2016): Bulletin revised to correct the Updates Replaced references for Window 10 and Windows 10 Version 1511 in the Affected Software table. This is an informational change only.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker logs on to the system and runs a specially crafted application.
Categories: Security Alerts

MS16-102 - Critical: Security Update for Microsoft Windows PDF Library (3182248) - Version: 1.2

Microsoft Security Notifications - Fri, 08/12/2016 - 09:00
Severity Rating: Critical
Revision Note: V1.2 (August 12, 2016): Bulletin revised to correct the updates replaced for Window 8.1, Windows Server 2012, and Windows Server 2012 R2. Bulletin revised to remove Windows 10 version 1607 from the affected software table because it is not affected. This is an informational change only. Customers who have already successfully installed the update do not need to take any action.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if a user views specially crafted PDF content online or opens a specially crafted PDF document. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Categories: Security Alerts

MS16-035 - Important: Security Update for .NET Framework to Address Security Feature Bypass (3141780) - Version: 2.3

Microsoft Security Notifications - Thu, 08/11/2016 - 09:00
Severity Rating: Important
Revision Note: V2.3 (August 11, 2016): Revised bulletin to announce a detection change to correct an offering issue for 3135996. This is a detection change only. There were no changes to the update files. Customers who have already successfully installed the update do not need to take any action.
Summary: This security update resolves a vulnerability in Microsoft .NET Framework. The security feature bypass exists in a .NET Framework component that does not properly validate certain elements of a signed XML document.
Categories: Security Alerts
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