CVE-2008-4250 is a critical remote code execution (RCE) vulnerability in the Microsoft Windows Server Service. The flaw is caused by an improperly handled RPC request resulting in a stack-based buffer overflow.

The vulnerability became widely known through exploitation by the Conficker worm and is associated with Microsoft Security Bulletin MS08-067

The vulnerability affects older Microsoft Windows systems, including:

• Windows 2000
• Windows XP
• Windows Vista
• Windows Server 2003
• Windows Server 2008 (certain configurations)

Because vCenter centrally manages virtual infrastructure, it is a high-value target.

This vulnerability is wormable, meaning it can spread automatically across networks without user interaction.

Typical exploitation flow:

Target scanning
o Attackers scan for systems exposing SMB/RPC services (TCP 445).

Malicious RPC request sent
o A specially crafted network packet is delivered to the Windows Server Service.

Buffer overflow triggered
o Improper bounds checking causes a stack overflow in memory.

Arbitrary code execution
o The attacker executes malicious code with SYSTEM privileges.

Automated propagation
o Malware may scan for additional vulnerable systems and self-propagate.

CERTVU recommends the following;

Apply Microsoft Security Updates (Critical)

• Install security update MS08-067 immediately on vulnerable systems
• Ensure all Windows systems are fully patched