Sugnature verification bypass in Microsoft Windows and Windows Server - CVE-2013-3900

Vulnerability identifier: #VU4344

CSH Severity: Critical

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2013-3900

CWE-ID: CWE-310

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to improper validation of PE file digests during Authenticode signature verification within WinVerifyTrust function. A remote attacker can create specially crafted signed PE file, trick the victim into executing it and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Microsoft Windows
Windows Server

Install update from vendor's website.

• https://technet.microsoft.com/en-us/library/security/ms13-098.aspx
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2013-3900

• Signature validation bypass in Microsoft Windows