CVE-2020-15678: When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free

Description

When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)1.9% · higher than 79% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

FI

Firefox · Mozilla

before 81.0 · source: NVD

DL

Debian Linux · Debian

9.0; 10.0 · source: NVD

FE

Firefox Esr · Mozilla

before 78.3 · source: NVD

LE

Leap · Opensuse

15.1; 15.2 · source: NVD

TH

Thunderbird · Mozilla

before 78.3 · source: NVD