High severity · published Aug 17, 2021
CVE-2021-29986
A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash
8.1
CVSS
1.3%
EPSS
No
On KEV
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:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 91.0 · source: NVD
FE
Firefox Esr · Mozilla
before 78.13.0 · source: NVD
TH
Thunderbird · Mozilla
before 78.13.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-29986
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-29986
Exploit
https://bugzilla.mozilla.org/show_bug.cgi?id=1696138
Third Party Advisory
https://security.gentoo.org/glsa/202202-03
Third Party Advisory
https://security.gentoo.org/glsa/202208-14
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-33/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-34/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-35/
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