PT-2021-10259 · Facebook · Hhvm

Jjergus · Published 2021-03-11 · Updated 2021-03-17 · CVE-2020-1898

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: HHVM versions prior to 4.32.3 HHVM versions 4.33.0 through 4.62.0

Description: The fb unserialize function did not impose a depth limit for nested deserialization, allowing a maliciously constructed string to cause deserialization to recurse and lead to stack exhaustion.

Recommendations: For HHVM versions prior to 4.32.3, update to version 4.32.3 or later. For HHVM versions 4.33.0 through 4.62.0, update to a version outside of this range, as these versions are affected. As a temporary workaround, consider restricting the use of the fb unserialize function to minimize the risk of exploitation.

Fix

Uncontrolled Recursion

Weakness Enumeration

CWE-674

Related Identifiers

CVE-2020-1898

Affected Products

Hhvm

References · 8

• https://github.com/facebook/hhvm/commit/1746dfb11fc0048366f34669e74318b8278a684c · Patch
• https://cve.org/CVERecord?id=CVE-2020-1898 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-1898 · Vendor Advisory
• https://hhvm.com/blog/2020/06/30/security-update.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-1898 · Security Note
• https://ubuntu.com/security/CVE-2020-1898 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-1898 · Vendor Advisory
• https://t.me/cvenotify/11151 · Telegram Post