CVE-2020-1892 Information

Description

Insufficient boundary checks when decoding JSON in JSON_parser allows read access to out of bounds memory potentially leading to information leak and DOS. This issue affects HHVM 4.45.0 4.44.0 4.43.0 4.42.0 4.41.0 4.40.0 4.39.0 versions between 4.33.0 and 4.38.0 (inclusive) versions between 4.9.0 and 4.32.0 (inclusive) and versions prior to 4.8.7.

CVSS Vector

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

Reference

https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d https://hhvm.com/blog/2020/02/20/security-update.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

8.1