Memory corruption via unchecked TriangleStrip vertex writes
Published Mar 25, 2025 · Updated Mar 25, 2025
Heap-based buffer overflow in Assimp 5.4.3 allows context-dependent attackers to corrupt process memory via a malformed AC3D file. AC3DImporter's ConvertObjectSection advances its mesh vertex pointer through mixed polygon and TriangleStrip surfaces without checking the allocated vertex count, causing an out-of-bounds write. An application must process the crafted file; the published proof of concept demonstrates a crash under AddressSanitizer, not code execution.
Summary
What happened
Heap-based buffer overflow in Assimp 5.4.3 allows context-dependent attackers to corrupt process memory via a malformed AC3D file. AC3DImporter's ConvertObjectSection advances its mesh vertex pointer through mixed polygon and TriangleStrip surfaces without checking the allocated vertex count, causing an out-of-bounds write. An application must process the crafted file; the published proof of concept demonstrates a crash under AddressSanitizer, not code execution.
The record
- CVE
- CVE-2025-2754
- Published
- Mar 25, 2025
- Updated
- Mar 25, 2025
- Vendor
- Open Asset Import Library
- Product
- Assimp
- Classifications
- CWE-119, CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 25, 2025CVE publishedPublication date reported by the CVE source.
- Mar 25, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.4.3
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Assimp AC3D ConvertObjectSection proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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