CVE-2008-1083: Windows GDI CreateDIBPatternBrushPt heap overflow via malformed EMF/WMF

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 19 September 2026. Confidence: high.

high priorityThe flaw allows remote code execution with no privileges or interaction required, public exploits exist, and EPSS is in the 99th percentile, though the affected platforms are largely legacy and a vendor patch is available.

What it is

A heap-based buffer overflow exists in the CreateDIBPatternBrushPt function in Windows GDI, triggered by an integer overflow when processing an EMF or WMF image with a malformed header. Because GDI is a core graphics component reachable through image rendering, a crafted image can corrupt heap memory and lead to code execution. The flaw affects Windows 2000 SP4, XP SP2, Server 2003 SP1/SP2, Vista, and Server 2008.

Impact

An attacker who gets a victim to render a crafted EMF or WMF file can execute arbitrary code in the context of the affected process or user. Successful exploitation can lead to full compromise of confidentiality, integrity, and availability on the host.

Attack surface

The vulnerability is network-reachable per the CVSS vector (AV:N) and requires no privileges (PR:N) and no user interaction (UI:N), though in practice delivery of a malicious image typically depends on how the file is opened or rendered. Any application or service that parses EMF/WMF content through GDI is a potential entry point.

Exploitation

CVE-2008-1083 is not listed in CISA KEV, but public exploit code exists in Exploit-DB (5442, 6330) and EPSS is very high (0.571, 99th percentile), indicating substantial real-world exploitation likelihood. No ransomware group associations are documented in the record.

What to do

• Apply the Microsoft security update for MS08-021 (KB948590) to all affected Windows versions; this is the primary fix.
• Retire or isolate unsupported platforms (Windows 2000, XP SP2, Server 2003) that cannot receive current patches.
• Block or strip EMF/WMF attachments and downloads at email and web gateways where business use does not require them.
• Harden rendering paths by disabling or sandboxing components that process untrusted image files (for example, legacy GDI-based viewers).
• Restrict user privileges so that code execution from a rendered image does not yield administrative rights.

Detection

• Monitor for processes spawning from image viewers, document handlers, or print spooler components after opening EMF/WMF files.
• Alert on EMF/WMF files with malformed or anomalous headers, especially those arriving via email or web download.
• Hunt for unusual child processes or network connections originating from GDI-rendering applications such as explorer.exe, iexplore.exe, or spoolsv.exe.
• Review endpoint telemetry for heap corruption crashes in GDI-related modules (gdi32.dll) that precede suspicious process creation.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.