CVE-2013-3900 is a high-severity vulnerability affecting various versions of Microsoft Windows, allowing remote attackers to execute arbitrary code through a crafted portable executable (PE) file. An attacker could exploit this vulnerability by modifying a signed executable file to add malicious code without invalidating the signature, potentially taking complete control of an affected system. Although the vulnerability primarily impacts Microsoft Windows, it's important to stay informed and vigilant about potential risks to other devices as well.

How do I know if I'm affected?

If you're using a version of Microsoft Windows such as Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, or Windows RT Gold and 8.1, you could be affected by the vulnerability. This flaw, known as the "WinVerifyTrust Signature Validation Vulnerability," allows remote attackers to execute arbitrary code through a crafted portable executable (PE) file. To know if you're affected, check if you're using one of the mentioned Windows versions and stay informed about potential risks.

What should I do if I'm affected?

If you're affected by the CVE-2013-3900 vulnerability, follow these steps to protect your system: 1) Apply the security update provided by Microsoft, 2) Enable stricter verification behavior as an opt-in feature, 3) Regularly update all software and apply security patches, 4) Use up-to-date security software, and 5) Practice safe browsing and downloading habits. These steps will help mitigate the risk and keep your system secure.

Is this in CISA’s Known Exploited Vulnerabilities Catalog?

The CVE-2013-3900 vulnerability, also known as the Microsoft WinVerifyTrust function Remote Code Execution, is listed in CISA's Known Exploited Vulnerabilities Catalog. It was added on January 10, 2022, with a due date of July 10, 2022. The required action is to apply updates according to vendor instructions. In simple terms, this vulnerability allows hackers to modify trusted files and insert harmful code, potentially gaining control over affected systems. To protect your system, it's crucial to apply the necessary updates.

Weakness enumeration

The weakness enumeration for this vulnerability is categorized as CWE-20, which allows remote code execution by exploiting the way Windows handles signature verification for portable executable files.

For more details

The CVE-2013-3900 vulnerability poses a significant risk to various versions of Microsoft Windows, allowing remote attackers to execute arbitrary code through a crafted portable executable file. It's crucial to stay informed, apply necessary updates, and follow best practices to protect your system. For a comprehensive understanding of this vulnerability and its implications, refer to the NVD page or the links below.

• NVD - CVE-2013-3900

• Archived MSDN and TechNet Blogs | Microsoft Learn

• Microsoft Security Bulletin MS13-098 - Critical

• CVE-2013-3900 - Security Update Guide - Microsoft - WinVerifyTrust Signature Validation Vulnerability