CVE-2020-26974 Information

Description

When flex-basis was used on a table wrapper a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 84 Thunderbird < 78.6 and Firefox ESR < 78.6.

CVSS Vector

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

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1681022 https://www.mozilla.org/security/advisories/mfsa2020-54/ https://www.mozilla.org/security/advisories/mfsa2020-55/ https://www.mozilla.org/security/advisories/mfsa2020-56/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8