CVE-2020-1916

CRITICAL

Facebook Hhvm < 4.56.2 - Out-of-Bounds Write

Title source: rule
STIX 2.1

Description

An incorrect size calculation in ldap_escape may lead to an integer overflow when overly long input is passed in, resulting in an out-of-bounds write. This issue affects HHVM prior to 4.56.2, all versions between 4.57.0 and 4.78.0, 4.79.0, 4.80.0, 4.81.0, 4.82.0, 4.83.0.

References (2)

Core 2
Core References
Release Notes, Vendor Advisory x_refsource_confirm
https://hhvm.com/blog/2020/11/12/security-update.html

Scores

CVSS v3 9.8
EPSS 0.0081
EPSS Percentile 74.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-122 CWE-787
Status published
Products (6)
facebook/hhvm 4.79.0
facebook/hhvm 4.80.0
facebook/hhvm 4.81.0
facebook/hhvm 4.82.0
facebook/hhvm 4.83.0
facebook/hhvm < 4.56.2
Published Mar 10, 2021
Tracked Since Feb 18, 2026