Process abort via sentinel scan past buffer end
Published Jan 8, 2020 · Updated Aug 4, 2024
Heap buffer over-read in GNU LibreDWG 0.9.3.2564 allows attackers to read past a DWG input buffer via a crafted DWG file. During its sentinel scan, bit_search_sentinel reads beyond the heap-backed input chain while searching for a 16-byte marker near the end of truncated input. An application using the library must process attacker-supplied DWG content; the published proof of concept triggers an AddressSanitizer-detected read and process abort, with no write primitive shown.
Summary
What happened
Heap buffer over-read in GNU LibreDWG 0.9.3.2564 allows attackers to read past a DWG input buffer via a crafted DWG file. During its sentinel scan, bit_search_sentinel reads beyond the heap-backed input chain while searching for a 16-byte marker near the end of truncated input. An application using the library must process attacker-supplied DWG content; the published proof of concept triggers an AddressSanitizer-detected read and process abort, with no write primitive shown.
The record
- CVE
- CVE-2020-6613
- Published
- Jan 8, 2020
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-125, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 8, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
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.
Public exploit references
- LibreDWG 0.9.3.2564 crafted DWG proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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