PT-2019-12571 · Facebook · Hhvm

Published 2019-12-04 · Updated 2019-12-11 · CVE-2019-11935

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions HHVM versions prior to 3.30.12 HHVM versions 4.0.0 through 4.8.5 HHVM versions 4.9.0 through 4.23.1 HHVM versions 4.24.0 through 4.28.1

Description The issue is caused by insufficient boundary checks when processing a string in the mb ereg replace function, allowing access to out-of-bounds memory.

Recommendations For HHVM versions prior to 3.30.12, update to version 3.30.12 or later. For HHVM versions 4.0.0 through 4.8.5, update to a version outside of this range. For HHVM versions 4.9.0 through 4.23.1, update to a version outside of this range. For HHVM versions 4.24.0 through 4.28.1, update to a version later than 4.28.1. As a temporary workaround, consider restricting the use of the mb ereg replace function until a patch is available.

Fix

Buffer Overflow

Out of bounds Read

Weakness Enumeration

CWE-120

CWE-125

Related Identifiers

CVE-2019-11935

Affected Products

Hhvm

References · 8

• https://github.com/facebook/hhvm/commit/1c518555dba6ceb45d5ba61845b96e261219c3b7 · Patch
• https://ubuntu.com/security/CVE-2019-11935 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-11935 · Security Note
• https://facebook.com/security/advisories/cve-2019-11935 · Vendor Advisory
• https://hhvm.com/blog/2019/10/28/security-update.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-11935 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-11935 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-11935 · Security Note