CVE-2021-23180

HIGH
Published Mar 2, 20224y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Mar 2, 2022 4y ago
Last Modified Jun 17, 2026 2w ago

Description

A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 1

VendorProductVersionRange
htmldoc_projecthtmldoc* ≤1.9.12

References 4

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1967041
    Issue TrackingPatchThird Party Advisory
  • github.com https://github.com/michaelrsweet/htmldoc/commit/19c582fb32eac74b57e155cffbb529377a9e751a
    PatchThird Party Advisory
  • github.com https://github.com/michaelrsweet/htmldoc/issues/418
    ExploitIssue TrackingThird Party Advisory
  • ubuntu.com https://ubuntu.com/security/CVE-2021-23180
    Third Party Advisory

Remediation

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1967041
    Issue TrackingPatchThird Party Advisory
  • github.com https://github.com/michaelrsweet/htmldoc/commit/19c582fb32eac74b57e155cffbb529377a9e751a
    PatchThird Party Advisory