CVE-2021-43539

CVSS V2 Medium 6.8 CVSS V3 High 8.8
Description
Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
Overview
  • CVE ID
  • CVE-2021-43539
  • Assigner
  • security@mozilla.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-12-08T22:15:09
  • Last Modified Date
  • 2022-12-09T15:55:49
Weakness Enumerations
CWE URL
CWE-416 http://cwe.mitre.org/data/definitions/416.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* 1 OR 95.0
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* 1 OR 91.4.0
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* 1 OR 91.4.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 6.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1739683 Issue Tracking Permissions Required Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202202-03 Third Party Advisory
https://security.gentoo.org/glsa/202208-14
https://www.debian.org/security/2021/dsa-5026 Third Party Advisory
https://www.debian.org/security/2022/dsa-5034 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2021-52/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-53/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-54/ Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-43539
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43539
History
Created Old Value New Value Data Type Notes
2022-05-10 15:45:43 Added to TrackCVE
2022-12-06 03:26:04 2021-12-08T22:15Z 2021-12-08T22:15:09 CVE Published Date updated
2022-12-06 03:26:04 2022-08-10T20:15:23 CVE Modified Date updated
2022-12-06 03:26:04 Undergoing Analysis Vulnerability Status updated
2022-12-06 03:26:09 References updated
2022-12-09 16:13:23 2022-12-09T15:55:49 CVE Modified Date updated
2022-12-09 16:13:23 Undergoing Analysis Analyzed Vulnerability Status updated