PT-2021-15649 · Facebook · Hhvm

Published 2021-03-10 · Updated 2021-03-16 · CVE-2021-24025

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 4.56.3 HHVM versions 4.57.0 through 4.80.1 HHVM versions 4.81.0 through 4.93.1 HHVM versions 4.94.0 through 4.98.0

Description: The issue is caused by incorrect string size calculations inside the preg quote function. A large input string passed to the function can trigger an integer overflow, leading to a heap overflow.

Recommendations: For versions prior to 4.56.3, update to version 4.56.3 or later. For versions 4.57.0 through 4.80.1, update to version 4.80.2 or later. For versions 4.81.0 through 4.93.1, update to version 4.93.2 or later. For versions 4.94.0 through 4.98.0, update to a version later than 4.98.0. As a temporary workaround, consider restricting the input to the preg quote function to prevent large input strings.

Fix

Integer Overflow

Heap Based Buffer Overflow

Weakness Enumeration

CWE-190

CWE-122

Related Identifiers

CVE-2021-24025

Affected Products

Hhvm

References · 8

• https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca · Patch
• https://osv.dev/vulnerability/CVE-2021-24025 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-24025 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-24025 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-24025 · Security Note
• https://ubuntu.com/security/CVE-2021-24025 · Vendor Advisory
• https://t.me/cvenotify/11417 · Telegram Post
• https://hhvm.com/blog/2021/02/25/security-update.html · Note