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TA15-051A: Lenovo Superfish Adware Vulnerable to HTTPS Spoofing

US-CERT Security Alerts - Fri, 02/20/2015 - 04:07
Original release date: February 20, 2015 | Last revised: February 24, 2015
Systems Affected

Lenovo consumer PCs that have Superfish VisualDiscovery installed.

Overview

Superfish adware installed on some Lenovo PCs install a non-unique trusted root certification authority (CA) certificate, allowing an attacker to spoof HTTPS traffic.

Description

Starting in September 2014, Lenovo pre-installed Superfish VisualDiscovery spyware on some of their PCs. This software intercepts users’ web traffic to provide targeted advertisements.  In order to intercept encrypted connections (those using HTTPS), the software installs a trusted root CA certificate for Superfish. All browser-based encrypted traffic to the Internet is intercepted, decrypted, and re-encrypted to the user’s browser by the application – a classic man-in-the-middle attack.  Because the certificates used by Superfish are signed by the CA installed by the software, the browser will not display any warnings that the traffic is being tampered with.  Since the private key can easily be recovered from the Superfish software, an attacker can generate a certificate for any website that will be trusted by a system with the Superfish software installed.  This means websites, such as banking and email, can be spoofed without a warning from the browser.

Although Lenovo has stated they have discontinued the practice of pre-installing Superfish VisualDiscovery, the systems that came with the software already installed will continue to be vulnerable until corrective actions have been taken.

To detect a system with Superfish installed, look for a HTTP GET request to:

superfish.aistcdn.com

The full request will look like:

http://superfish.aistcdn.com/set.php?ID=[GUID]&Action=[ACTION]

Where [ACTION] is at least 1, 2, or 3.  1 and then 2 are sent when a computer is turned on. 3 is sent when a computer is turned off.    

Superfish uses a vulnerable SSL decryption library by Komodia. Other applications that use the library may be similarly affected. Please refer to CERT Vulnerability Note VU#529496 for more details and updates.

Impact

A machine with Superfish VisualDiscovery installed will be vulnerable to SSL spoofing attacks without a warning from the browser.

Solution

Uninstall Superfish VisualDiscovery and associated root CA certificate

Users should uninstall Superfish VisualDiscovery. Lenovo has provided a tool to uninstall Superfish and remove all associated certificates.

It is also necessary to remove affected root CA certificates. Simply uninstalling the software does not remove the certificate. Microsoft provides guidance on deleting and managing certificates in the Windows certificate store. In the case of Superfish VisualDiscovery, the offending trusted root certification authority certificate is issued to “Superfish, Inc.”

Mozilla provides similar guidance for their software, including the Firefox and Thunderbird certificate stores.

References Revision History
  • February 20, 2015: Initial release
  • February 20, 2015: Clarified software release dates
  • February 24, 2015: Updated description and solution details

This product is provided subject to this Notification and this Privacy & Use policy.


Categories: Security Alerts

MS15-010 - Critical: Vulnerabilities in Windows Kernel-Mode Driver Could Allow Remote Code Execution (3036220) - Version: 1.1

Microsoft Security Notifications - Tue, 02/17/2015 - 23:00
Severity Rating: Critical
Revision Note: V1.1 (February 18, 2015): Bulletin revised to add an Update FAQ that explains why there are two packages on the Microsoft Download Center pages for affected editions of Windows Server 2003, Windows Server 2008, and Windows Vista. The additional package (3037639) is not needed to be protected from the vulnerabilities addressed by the 3013455 update; it simply corrects a text quality problem that some customers experienced after installing the 3013455 update on the indicated systems.
Summary: This security update resolves six privately reported vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if an attacker convinces a user to open a specially crafted document or to visit an untrusted website that contains embedded TrueType fonts. To exploit the vulnerability an attacker would need to convince a user to open a specially crafted document or visit an untrusted website that contains embedded TrueType Fonts.
Categories: Security Alerts

MS15-012 - Important: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (3032328) - Version: 1.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (February 10, 2015): Bulletin published.
Summary: This security update resolves three privately reported vulnerabilities in Microsoft Office. 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 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 those who operate with administrative user rights.
Categories: Security Alerts

MS15-013 - Important: Vulnerability in Microsoft Office Could Allow Security Feature Bypass (3033857) - Version: 1.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (February 10, 2015): Bulletin published.
Summary: This security update resolves one publicly disclosed vulnerability in Microsoft Office. The vulnerability could allow security feature bypass if a user opens a specially crafted Microsoft Office file. The security feature bypass by itself does not allow arbitrary code execution. However, an attacker could use this security feature bypass vulnerability in conjunction with another vulnerability, such as a remote code execution vulnerability, to run arbitrary code.
Categories: Security Alerts

MS15-014 - Important: Vulnerability in Group Policy Could Allow Security Feature Bypass (3004361) - Version: 1.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (February 10, 2015): V1.0 (February 10, 2015): Bulletin published.
Summary: Bulletin published.
Categories: Security Alerts

MS15-015 - Important: Vulnerability in Microsoft Windows Could Allow Elevation of Privilege (3031432) - Version: 1.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (February 10, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an authenticated attacker acquires administrator credentials and runs a specially crafted application designed to increase privileges.
Categories: Security Alerts

MS15-017 - Important: Vulnerability in Virtual Machine Manager Could Allow Elevation of Privilege (3035898) - Version: 1.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (February 10, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Virtual Machine Manager (VMM). The vulnerability could allow elevation of privilege if an attacker logs on an affected system. An attacker must have valid Active Directory logon credentials and be able to log on with those credentials to exploit the vulnerability.
Categories: Security Alerts

MS15-011 - Critical: Vulnerability in Group Policy Could Allow Remote Code Execution (3000483) - Version: 1.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Critical
Revision Note: V1.0 (February 10, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. A remote code execution vulnerability exists in how group policy receives and applies connection data when a domain-joined system connects to a domain controller. An attacker who successfully exploited this vulnerability could take complete 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

MS15-016 - Important: Vulnerability in Microsoft Graphics Component Could Allow Information Disclosure (3029944) - Version: 1.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (February 10, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow information disclosure if a user browses to a website containing a specially crafted TIFF image. This vulnerability would not allow an attacker to execute code or to elevate their user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system.
Categories: Security Alerts

MS15-009 - Critical: Security Update for Internet Explorer (3034682) - Version: 1.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Critical
Revision Note: V1.0 (February 10, 2015): Bulletin published.
Summary: This security update resolves one publicly disclosed and forty privately reported vulnerabilities in Internet Explorer. The most severe of these vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited these 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 those who operate with administrative user rights.
Categories: Security Alerts

MS14-083 - Important: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (3017347) - Version: 2.0

Microsoft Security Notifications - Mon, 02/09/2015 - 23:00
Severity Rating: Important
Revision Note: V2.0 (February 10, 2015): Bulletin rereleased to announce the availability of an additional update package for Microsoft Excel Viewer (2920791) that addresses the vulnerabilities discussed in this bulletin. Note that the 2920791 update also addresses a vulnerability discussed in MS15-012, which is being released concurrently. Microsoft recommends that customers running Microsoft Excel Viewer apply the 2920791 update at their earliest convenience. See the Affected Software table for the download link.
Summary: This security update resolves two privately reported vulnerabilities in Microsoft Excel. The vulnerabilities could allow remote code execution if an attacker convinces a user to open or preview a specially crafted Microsoft Excel file in an affected version of Microsoft Office software. 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 then install programs; view, change, or delete data; or create new accounts with full user rights. Customers 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

MS15-006 - Important: Vulnerability in Windows Error Reporting Could Allow Security Feature Bypass (3004365) - Version: 1.1

Microsoft Security Notifications - Tue, 01/20/2015 - 23:00
Severity Rating: Important
Revision Note: V1.1 (January 21, 2015): Bulletin revised to correct Server Core installation entries in the Affected Software and Severity Ratings tables. This is an informational change only. Customers who have already successfully installed the update do not have to take any action.
Summary: This security update resolves a privately reported vulnerability in Windows Error Reporting (WER). The vulnerability could allow security feature bypass if successfully exploited by an attacker. An attacker who successfully exploited this vulnerability could gain access to the memory of a running process. 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

MS15-001 - Important: Vulnerability in Windows Application Compatibility Cache Could Allow Elevation of Privilege (3023266) - Version: 1.0

Microsoft Security Notifications - Mon, 01/12/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (January 13, 2015): V1.0 (January 13, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker logs on to a system and runs a specially crafted application. An authenticated attacker who successfully exploited this vulnerability could bypass existing permission checks that are performed during cache modification in the Microsoft Windows Application Compatibility component and execute arbitrary code with elevated privileges.
Categories: Security Alerts

MS15-003 - Important: Vulnerability in Windows User Profile Service Could Allow Elevation of Privilege (3021674) - Version: 1.0

Microsoft Security Notifications - Mon, 01/12/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (January 13, 2015): V1.0 (January 13, 2015): Bulletin published.
Summary: This security update resolves a publicly disclosed vulnerability in the Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker logs on to the system and runs a specially crafted application. A local attacker who successfully exploited this vulnerability could run arbitrary code on a target system with elevated privileges. An attacker must have valid logon credentials and be able to log on locally to exploit the vulnerability.
Categories: Security Alerts

MS15-008 - Important: Vulnerability in Windows Kernel-Mode Driver Could Allow Elevation of Privilege (3019215) - Version: 1.0

Microsoft Security Notifications - Mon, 01/12/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (January 13, 2015): Bulletin published.
Summary: This security update resolves one privately reported vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker runs a specially crafted application on an affected system. An attacker must have valid logon credentials and be able to log on locally to exploit the vulnerability.
Categories: Security Alerts

MS15-005 - Important: Vulnerability in Network Location Awareness Service Could Allow Security Feature Bypass (3022777) - Version: 1.0

Microsoft Security Notifications - Mon, 01/12/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (January 13, 2015): V1.0 (January 13, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow security feature bypass by unintentionally relaxing the firewall policy and/or configuration of certain services when an attacker on the same network as the victim spoofs responses to DNS and LDAP traffic initiated by the victim.
Categories: Security Alerts

MS15-002 - Critical: Vulnerability in Windows Telnet Service Could Allow Remote Code Execution (3020393) - Version: 1.0

Microsoft Security Notifications - Mon, 01/12/2015 - 23:00
Severity Rating: Critical
Revision Note: V1.0 (January 13, 2015): V1.0 (January 13, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if an attacker sends specially crafted packets to an affected Windows server. Only customers who enable this service are vulnerable. By default, Telnet is installed but not enabled on Windows Server 2003. Telnet is not installed by default on Windows Vista and later operating systems.
Categories: Security Alerts

MS15-007 - Important: Vulnerability in Network Policy Server RADIUS Implementation Could Cause Denial of Service (3014029) - Version: 1.0

Microsoft Security Notifications - Mon, 01/12/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (January 13, 2015): Bulletin published
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow denial of service on an Internet Authentication Service (IAS) or Network Policy Server (NPS) if an attacker sends specially crafted username strings to the IAS or NPS. Note that the denial of service vulnerability would not allow an attacker to execute code or to elevate user rights; however, it could prevent RADIUS authentication on the IAS or NPS.
Categories: Security Alerts

MS15-004 - Important: Vulnerability in Windows Components Could Allow Elevation of Privilege (3025421) - Version: 1.0

Microsoft Security Notifications - Mon, 01/12/2015 - 23:00
Severity Rating: Important
Revision Note: V1.0 (January 13, 2015): V1.0 (January 13, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker convinces a user to run a specially crafted application. 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 then install programs; view, change, or delete data; or create new accounts with full user rights. Customers 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

MS14-080 - Critical: Cumulative Security Update for Internet Explorer (3008923) - Version: 2.0

Microsoft Security Notifications - Mon, 01/12/2015 - 23:00
Severity Rating: Critical
Revision Note: V2.0 (January 13, 2015): To address issues with Security Update 3008923, Microsoft re-released MS14-080 to comprehensively address CVE-2014-6363. In addition to installing update 3008923, customers running Internet Explorer 10 on Windows 8, Windows Server 2012, or Window RT should also install update 3029449, which has been added with this rerelease. Customers who have already successfully installed the 3008923 update, which has not changed since its original release, do not need to reinstall it. See Microsoft Knowledge Base Article 3008923 for more information.
Summary: This security update resolves fourteen privately reported vulnerabilities in Internet Explorer. The most severe of these vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited these 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 those who operate with administrative user rights.
Categories: Security Alerts
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