High Threat Security Alert (A22-01-17): Vulnerability in Microsoft Windows

Description:

Microsoft has released an out-of-band security update to address the vulnerability in the WinVerifyTrust function that handles Windows Authenticode signature verification for portable executable (PE) files.  An attacker could modify an existing signed file to include malicious code without invalidating the signature by exploiting the vulnerability.

For detailed information, please refer to the following vendor's URL:

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2013-3900

Reports indicate that a security feature bypass vulnerability in Microsoft Windows and Server (CVE-2013-3900) is being actively exploited.  System administrators are advised to take immediate actions to patch your affected systems to mitigate the elevated risk of cyber attacks.

Affected Systems:

• Microsoft Windows 7, 8.1, RT 8.1, 10, 11
• Microsoft Windows Server 2008, 2008 R2, 2012, 2012 R2, 2016, 2019, 2022

Impact:

A successful exploitation could lead to security feature bypass on an affected system.

Recommendation:

Patches for affected products are available from the Windows Update / Microsoft Update Catalog. Users of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.

More Information:

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2013-3900
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3900