Service crash via regex heap buffer overflow
Published Aug 10, 2022 · Updated Nov 1, 2024
Heap buffer overflow in ClamAV 0.104.0 through 0.104.2 and 0.103.5 and earlier allows local users to crash ClamAV at database load. The vendored regex library performs improper bounds checking while the signature database loader parses a crafted CDB file, causing a multi-byte out-of-bounds heap write. Exploitation requires placing the file in the ClamAV database directory; successful exploitation crashes the service and can execute code as the clamav user.
Summary
What happened
Heap buffer overflow in ClamAV 0.104.0 through 0.104.2 and 0.103.5 and earlier allows local users to crash ClamAV at database load. The vendored regex library performs improper bounds checking while the signature database loader parses a crafted CDB file, causing a multi-byte out-of-bounds heap write. Exploitation requires placing the file in the ClamAV database directory; successful exploitation crashes the service and can execute code as the clamav user.
The record
- CVE
- CVE-2022-20792
- Published
- Aug 10, 2022
- Updated
- Nov 1, 2024
- Vendor
- ClamAV
- Product
- ClamAV
- Classifications
- CWE-125, CWE-787
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 10, 2022CVE publishedPublication date reported by the CVE source.
- Nov 1, 2024Record 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=0.104.0 <unspecified
- Affected versionversion=unspecified <=0.103.5
- Affected versionversion=unspecified <=0.104.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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