Read the docs
TI-2019-02978 Aliases CVE-2019-3973GHSA-mpmv-49pr-6hch

Out-of-bounds write in Comodo Antivirus

Priority LOW 25CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Comodo Antivirus versions 11.0.0.6582 and below are vulnerable to Denial of Service affecting CmdGuard.sys via its filter port "cmdServicePort". A low privileged process can crash CmdVirth.exe to decrease the port's connection count followed by process hollowing a CmdVirth.exe instance with malicious code to obtain a handle to "cmdServicePort". Once this occurs, a specially crafted message can be sent to "cmdServicePort" using "FilterSendMessage" API. This can trigger an out-of-bounds write if lpOutBuffer parameter in FilterSendMessage API is near the end of specified buffer bounds. The crash occurs when the driver performs a memset operation which uses a size beyond the size of buffer specified, causing kernel crash.

Why it matters now

EPSS 0.00387 33rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Comodo Antivirusup to 11.0.0.6582—No fix listedCNA
  • Comodo Antivirus Vendor— Affected up to 11.0.0.6582 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:comodo:antivirus:*:*:*:*:*:*:*:*up to 11.0.0.6582VulnerableComodo
  • cpe:2.3:a:comodo:antivirus:*:*:*:*:*:*:*:* Versions up to 11.0.0.6582 Vulnerable ·Comodo

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-3973
  2. 2026-10-03 Alias added: GHSA-mpmv-49pr-6hch

References

Exploit 1

  • TI-2022-14995 Comodo Antivirus 12.2.2.8012 has a quarantine flaw that allows privilege escalation. CVSS 3.1HIGH 7.8
  • TI-2019-02974 Comodo Antivirus versions up to 12.0.0.6810 are vulnerable to Local Privilege Escalation… CVSS 3.0HIGH 7.8
  • TI-2019-10625 Comodo Antivirus through 12.0.0.6870, Comodo Firewall through 12.0.0.6870, and Comodo… CVSS 3.0HIGH 7.1
  • TI-2019-02977 Out-of-bounds read in Comodo Antivirus CVSS 3.0MEDIUM 5.5
  • TI-2019-02976 Comodo Antivirus versions up to 12.0.0.6810 are vulnerable to a local Denial of Service… CVSS 3.0MEDIUM 5.5
  • TI-2019-02975 Exposure of resource to wrong sphere in Comodo Antivirus CVSS 3.0MEDIUM 5.5
See all 7 →

Sources

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