CVE-2020-1916 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4 https://hhvm.com/blog/2020/11/12/security-update.html

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