CVE-2021-29964

high

Description

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.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1706501

https://www.mozilla.org/security/advisories/mfsa2021-23/

https://www.mozilla.org/security/advisories/mfsa2021-24/

https://www.mozilla.org/security/advisories/mfsa2021-26/

Details

Source: MITRE

Published: 2021-06-24

Updated: 2021-06-30

Type: CWE-125

Risk Information

CVSS v2

Base Score: 5.8

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:P

Impact Score: 4.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 7.1

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Impact Score: 5.2

Exploitability Score: 1.8

Severity: HIGH