Denial of Service Vulnerability in Comodo Antivirus
CVE-2019-3973

5.5MEDIUM

Key Information:

Vendor

Comodo

Status
Comodo Antivirus
Vendor
CVE Published:
17 July 2019

What is CVE-2019-3973?

Comodo Antivirus versions 11.0.0.6582 and earlier are affected by a Denial of Service vulnerability through CmdGuard.sys. This vulnerability allows a low privileged process to exploit cmdServicePort. The process can crash CmdVirth.exe, leading to decreased connection count for the port. By hollowing out the CmdVirth.exe instance with malicious code and sending a specially crafted message via the FilterSendMessage API, an out-of-bounds write can be triggered due to improper handling of buffer sizes during a memset operation, resulting in a kernel crash.

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Affected Version(s)

Comodo Antivirus Versions 11.0.0.6582 and below

References

https://www.tenable.com/security/research/tra-2019-34
x_refsource_MISC

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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