CVE-2021-29988

high

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.

References

https://www.mozilla.org/security/advisories/mfsa2021-34/

https://www.mozilla.org/security/advisories/mfsa2021-33/

https://www.mozilla.org/security/advisories/mfsa2021-36/

https://www.mozilla.org/security/advisories/mfsa2021-35/

https://bugzilla.mozilla.org/show_bug.cgi?id=1717922

https://security.gentoo.org/glsa/202202-03

https://security.gentoo.org/glsa/202208-14

Details

Source: MITRE

Published: 2021-08-17

Updated: 2022-12-09

Type: CWE-125

Risk Information

CVSS v2

Base Score: 6.8

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

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 8.8

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

Impact Score: 5.9

Exploitability Score: 2.8

Severity: HIGH