Scanning denial of service via OLE2 over-read
Published Feb 7, 2024 · Updated Feb 13, 2025
Heap buffer over-read in ClamAV's OLE2 parser in Cisco Secure Endpoint allows remote attackers to interrupt Windows scanning. The parser incorrectly checks end-of-string values while scanning crafted OLE2 content, reads beyond a heap buffer, and can leave the connector's ClamAV service in a CPU-consuming loop. Exploitation requires an OLE2 file to reach scanning; the Windows connector can stop responding and delay or prevent later scans, while Linux and Mac connectors are unaffected.
Summary
What happened
Heap buffer over-read in ClamAV's OLE2 parser in Cisco Secure Endpoint allows remote attackers to interrupt Windows scanning. The parser incorrectly checks end-of-string values while scanning crafted OLE2 content, reads beyond a heap buffer, and can leave the connector's ClamAV service in a CPU-consuming loop. Exploitation requires an OLE2 file to reach scanning; the Windows connector can stop responding and delay or prevent later scans, while Linux and Mac connectors are unaffected.
The record
- CVE
- CVE-2024-20290
- Published
- Feb 7, 2024
- Updated
- Feb 13, 2025
- Vendor
- ClamAV
- Product
- Cisco Secure Endpoint Private Cloud Console
- Classifications
- CWE-126, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 7, 2024CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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- Affected versionversion=N/A
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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