CVE-2020-1888 Information

Description

Insufficient boundary checks when decoding JSON in handleBackslash reads out of bounds memory potentially leading to 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:N/S:U/C:N/I:N/A:H

Reference

https://github.com/facebook/hhvm/commit/b3679121bb3c7017ff04b4c08402ffff5cf59b13 https://hhvm.com/blog/2020/02/20/security-update.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5