CVE-2021-29986 — Race Condition in Mozilla Firefox

CWE-362 — Race ConditionCWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition13 documents8 sources
Severity
8.1HIGHNVD
OSV5.9
EPSS
0.6%
top 30.85%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedAug 17
Latest updateMay 24

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.2 | Impact: 5.9

Affected Packages8 packages

▶CVEListV5mozilla/firefoxunspecified — 91
▶NVDmozilla/firefox< 91.0
▶CVEListV5mozilla/firefox_esrunspecified — 78.13
▶CVEListV5mozilla/thunderbirdunspecified — 78.13+1
▶NVDmozilla/firefox_esr< 78.13.0

🔴Vulnerability Details

4
GHSA
GHSA-vrcx-8xp2-2764: A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash↗2022-05-24
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OSV
thunderbird vulnerabilities↗2021-08-31
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OSV
CVE-2021-29986: A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash↗2021-08-17
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CVEList
CVE-2021-29986: A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash↗2021-08-17
▶

📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2021-08-31
▶
Ubuntu
Firefox vulnerabilities↗2021-08-11
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Red Hat
Mozilla: Race condition when resolving DNS names could have led to memory corruption↗2021-08-10
▶
Debian
CVE-2021-29986: firefox - A suspected race condition when calling getaddrinfo led to memory corruption and...↗2021
▶
Mozilla
Mozilla Foundation Security Advisory 2021-33: CVE-2021-29986↗
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CVE-2021-29986 — Race Condition in Mozilla Firefox | cvebase