#VU46965 Use-after-free in Mozilla Firefox and Firefox ESR - CVE-2020-15678

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing HTML content. 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.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Remediation

External links

• https://www.mozilla.org/en-US/security/advisories/mfsa2020-42/
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/