CVE-2019-9796 Information

Description

A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh driver twice when only a single registration is expected. When a registration is later freed with the removal of the animation controller element the refresh driver incorrectly leaves a dangling pointer to the driver’s observer array. This vulnerability affects Thunderbird 60.6 Firefox ESR 60.6 and Firefox 66.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://access.redhat.com/errata/RHSA-2019:0966 https://access.redhat.com/errata/RHSA-2019:1144 https://bugzilla.mozilla.org/show_bug.cgi?id=1531277 https://www.mozilla.org/security/advisories/mfsa2019-07/ https://www.mozilla.org/security/advisories/mfsa2019-08/ https://www.mozilla.org/security/advisories/mfsa2019-11/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8