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CVE-2021-29964

Date: June 24, 2021

A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.

Severity Score

Related Resources (7)

https://nvd.nist.gov/vuln/detail/CVE-2021-29964
https://bugzilla.mozilla.org/show_bug.cgi?id=1706501
https://www.mozilla.org/security/advisories/mfsa2021-26/
https://access.redhat.com/security/cve/CVE-2021-29964
https://www.mozilla.org/security/advisories/mfsa2021-24/
https://www.mozilla.org/security/advisories/mfsa2021-23/
https://www.mend.io/vulnerability-database/CVE-2021-29964

Severity Score

Weakness Type (CWE)

Out-of-bounds Read

CWE-125

CVSS v3.1

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

CVSS v2

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

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