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TI-2020-19302 Aliases CVE-2020-37167GHSA-9wpq-3w4j-985q

ClamAV ClamBC < 0.103.0-rc - 'ClamBC' Executable Regular Expression Error

Priority HIGH 78Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

ClamAV versions prior to 0.103.0-rc contain a vulnerability in function name processing through the ClamBC bytecode interpreter that allows attackers to manipulate bytecode function names. Attackers can exploit the weak input validation in function name encoding to potentially execute malicious bytecode or cause unexpected behavior in the ClamAV engine.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00194 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed ClamBC (ClamAV): 0.103.0-rc

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ClamAVClamBCbefore 0.103.0-rc0.103.0-rcPatch availableCNA
  • ClamBC VendorClamAV Affected before 0.103.0-rc Fixed in 0.103.0-rc Patch available CNA

Remediation

  • Fix · CNA ClamBC (ClamAV) Fixed in 0.103.0-rc

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-37167
  2. 2026-10-03 Alias added: GHSA-9wpq-3w4j-985q

References

Exploit 1

Patch 1

Other 1

  • TI-2024-13262 ClamAV VirusEvent File Processing Command Injection Vulnerability CVSS 3.1MEDIUM 5.3
  • TI-2023-06741 Buffer overflow in Cisco Secure Web Appliance CVSS 3.1CRITICAL 9.8
  • TI-2012-01281 The TAR file parser in AhnLab V3 Internet Security 2011.01.18.00, Avira AntiVir… CVSS 2.0MEDIUM 4.3
  • TI-2012-01279 The TAR file parser in Avira AntiVir 7.11.1.163, Antiy Labs AVL SDK 2.0.3.7, avast!… CVSS 2.0MEDIUM 4.3
  • TI-2012-01265 The RAR file parser in ClamAV 0.96.4, Rising Antivirus 22.83.00.03, Quick Heal (aka Cat… CVSS 2.0MEDIUM 4.3
  • TI-2017-09151 Memory corruption in ClamAV AntiVirus software versions 0.99.2 and prior CVSS 3.0CRITICAL 9.8
See all 103 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences