BigDiskBuster Windows Defender DoS Vulnerability Blocks Platform and Signature Updates
Unverified GitHub proof-of-concept BigDiskBuster blocks Microsoft Defender platform and signature updates, potentially leaving Windows endpoints with outdated anti-malware protection.
The BigDiskBuster proof of concept, published on GitHub by user MSNightmare and written in C++, claims to prevent Microsoft Defender from completing platform and security intelligence updates across all supported Windows versions. The repository has over 130 stars and 20 forks, but there is no CVE, Microsoft advisory, or independent verification, and required privileges are unclear. Blocking updates could progressively degrade Defender's detection of new malware, phishing, and ransomware families, enabling defense evasion.
- C++ proof of concept by MSNightmare blocks Defender platform and security intelligence updates.
- Claimed to work on all supported Windows versions but is unverified and 'a bit buggy'.
- No CVE, Microsoft advisory, or confirmation of whether admin rights are required.
- Outdated signatures could enable defense evasion for new malware already added to detections.
- Vendors
- Microsoft
- Products
- Microsoft Defender
- Organizations
- GitHub
From the original article
3 min read at gbhackers.com
A recently published proof-of-concept project named BigDiskBuster claims to prevent Microsoft Defender from completing its platform and security intelligence signature updates. This could create a potential denial-of-service condition, leaving Windows endpoints operating with outdated anti-malware protection.
By Divya · gbhackers.com
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