Zero-day vulnerability in Windows Media Format Runtime

Memory corruption
CVE-2009-0555

Vulnerability details

Advisory: SB2009101302 - Two remote code execution vulnerabilities in Microsoft Windows

Vulnerable component: Windows Media Format Runtime

CVE-ID: CVE-2009-0555

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-119 - Memory corruption

Description:

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

The weakness exists due to boundary error when processing malformed Advanced Systems Format (ASF) files. A remote attacker can create a specially crafted audio file that uses the Windows Media Speech code, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system 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.

External links:

https://technet.microsoft.com/en-us/library/security/ms09-051.aspx
http://www.its.ms.gov/Services/SecurityAlerts/2009-10-13-vulnerabilities_in_windows_media_runtime_co...
https://www.symantec.com/connect/nl/blogs/microsoft-patch-tuesday-october-2009

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.