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CVE-2021-23979

Date: February 26, 2021

Mozilla developers reported memory safety bugs present in Firefox 85. 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 Firefox < 86.

Severity Score

Related Resources (6)

https://people.canonical.com/~ubuntu-security/cve/CVE-2021-23979
https://www.mozilla.org/security/advisories/mfsa2021-07/
https://security.alpinelinux.org/vuln/CVE-2021-23979
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1663222%2C1666607%2C1672120%2C1678463%2C1678927%2C1679560%2C1681297%2C1681684%2C1683490%2C1684377%2C1684902
https://nvd.nist.gov/vuln/detail/CVE-2021-23979
https://www.mend.io/vulnerability-database/CVE-2021-23979

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

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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