CVE-2021-29986 : A suspected race condition when calling getaddrinfo led to memory corruption and

A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash. *Note: This issue only affected Linux operating systems. Other operating systems are unaffected.* This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

Published 2021-08-17 20:15:08

Updated 2022-12-09 19:17:09

Source Mozilla Corporation

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2021-29986

Mozilla » Firefox
Versions before (<) 91.0
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel » Version: N/A
Mozilla » Thunderbird
Versions before (<) 78.13.0
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel » Version: N/A
Mozilla » Firefox Esr
Versions before (<) 78.13.0
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-29986

EPSS FAQ

1.69%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 88 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-29986

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:P	8.6	6.4	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
8.1	HIGH	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	2.2	5.9	NIST
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-29986

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-29986

https://www.mozilla.org/security/advisories/mfsa2021-34/

Security Vulnerabilities fixed in Firefox ESR 78.13 — Mozilla
Vendor Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2021-36/

Security Vulnerabilities fixed in Thunderbird 91 — Mozilla
Vendor Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/202202-03

Mozilla Firefox: Multiple vulnerabilities (GLSA 202202-03) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2021-33/

Security Vulnerabilities fixed in Firefox 91 — Mozilla
Vendor Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2021-35/

Security Vulnerabilities fixed in Thunderbird 78.13 — Mozilla
Vendor Advisory

CVEs referencing this url
https://bugzilla.mozilla.org/show_bug.cgi?id=1696138

Access Denied
Exploit;Issue Tracking;Vendor Advisory
https://security.gentoo.org/glsa/202208-14

Mozilla Thunderbird: Multiple Vulnerabilities (GLSA 202208-14) — Gentoo security
Third Party Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-29986

Products affected by CVE-2021-29986

Exploit prediction scoring system (EPSS) score for CVE-2021-29986

CVSS scores for CVE-2021-29986

CWE ids for CVE-2021-29986

References for CVE-2021-29986