CVE-2019-11926 Information

Description

Insufficient boundary checks when processing M_SOFx markers from JPEG headers in the GD extension could allow access to out-of-bounds memory via a maliciously constructed invalid JPEG input. This issue affects HHVM versions prior to 3.30.9 all versions between 4.0.0 and 4.8.3 all versions between 4.9.0 and 4.15.2 and versions 4.16.0 to 4.16.3 4.17.0 to 4.17.2 4.18.0 to 4.18.1 4.19.0 4.20.0 to 4.20.1.

CVSS Vector

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

Reference

https://github.com/facebook/hhvm/commit/f9680d21beaa9eb39d166e8810e29fbafa51ad15 https://hhvm.com/blog/2019/09/03/security-update.html https://www.facebook.com/security/advisories/cve-2019-11926

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