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CVE-2021-29967

Good to know:

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Date: June 24, 2021

Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.

Severity Score

Related Resources (11)

https://security-tracker.debian.org/tracker/CVE-2021-29967
https://security.gentoo.org/glsa/202208-14
https://security.alpinelinux.org/vuln/CVE-2021-29967
https://www.mozilla.org/security/advisories/mfsa2021-26/
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-29967
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1602862%2C1703191%2C1703760%2C1704722%2C1706041
https://nvd.nist.gov/vuln/detail/CVE-2021-29967
https://www.mozilla.org/security/advisories/mfsa2021-24/
https://access.redhat.com/security/cve/CVE-2021-29967
https://www.mozilla.org/security/advisories/mfsa2021-23/
https://www.mend.io/vulnerability-database/CVE-2021-29967

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

Out-of-bounds Write

CWE-787

Top Fix

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Upgrade Version

Upgrade to version Thunderbird:78.11; Firefox:89; Firefox ESR:78.11

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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