CVEvulnerability
CVE-2021-29964
7.1 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-06-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:P
- Weaknesses
- CWE-125
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.
Affected configurations
• mozilla firefox (< 89.0)
• mozilla firefox esr (< 78.11)
• mozilla thunderbird (< 78.11)
Related
Weakness · CWE (1)
- CWE-125 Out-of-bounds Read weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1706501 Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-23/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-24/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-26/ Release Notes, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1706501 Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-23/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-24/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-26/ Release Notes, Vendor Advisory