CVE-2020-14354

LOW EPSS 40.7%
Published May 13, 20215y ago · Modified Jun 17, 20262w ago
3.3 CVSS 3.1
Low
Find Similar
Published May 13, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is called prior to ares_getaddrinfo() completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability.

CVSS Details

Base Score
3.3
Exploitability
1.8
Impact
1.4
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
40.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 3

CWE-120
CWE-415
CWE-416 Use After Free Memory Safety

Affected Products 2

VendorProductVersionRange
c-aresc-ares1.16.0any
fedoraprojectfedora33any

References 5

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1866838
    ExploitIssue TrackingPatchThird Party Advisory
  • c-ares.haxx.se https://c-ares.haxx.se/changelog.html
    Release NotesVendor Advisory
  • github.com https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e
    PatchThird Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
  • packetstormsecurity.com https://packetstormsecurity.com/files/158755/GS20200804145053.txt
    ExploitThird Party AdvisoryVDB Entry

Remediation

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1866838
    ExploitIssue TrackingPatchThird Party Advisory
  • github.com https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e
    PatchThird Party Advisory