CVEvulnerability
CVE-2021-29988
8.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-08-17
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-125, CWE-787
Description
Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory corruption, and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
Affected configurations
• mozilla firefox (< 91.0)
• mozilla firefox esr (< 78.13.0)
• mozilla thunderbird (< 78.13.0)
Related
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1717922 Exploit, Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/202202-03 Third Party Advisory
- https://security.gentoo.org/glsa/202208-14 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-33/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-34/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-35/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-36/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1717922 Exploit, Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/202202-03 Third Party Advisory
- https://security.gentoo.org/glsa/202208-14 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-33/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-34/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-35/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-36/ Vendor Advisory