CVE-2019-3973

CVSS V2 Medium 4.9 CVSS V3 Medium 5.5
Description
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.
Overview
  • CVE ID
  • CVE-2019-3973
  • Assigner
  • vulnreport@tenable.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2019-07-17T21:15:12
  • Last Modified Date
  • 2019-07-23T18:19:41
Weakness Enumerations
CWE URL
CWE-787 http://cwe.mitre.org/data/definitions/787.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:comodo:antivirus:*:*:*:*:*:*:*:* 1 OR 11.0.0.6582
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:N/I:N/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 4.9
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 5.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://www.tenable.com/security/research/tra-2019-34 Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-3973
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3973
History
Created Old Value New Value Data Type Notes
2022-05-10 17:40:32 Added to TrackCVE
2022-12-03 23:27:04 2019-07-17T21:15Z 2019-07-17T21:15:12 CVE Published Date updated
2022-12-03 23:27:04 2019-07-23T18:19:41 CVE Modified Date updated
2022-12-03 23:27:04 Analyzed Vulnerability Status updated