CVE-2020-1893 Information

Description

Insufficient boundary checks when decoding JSON in TryParse 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/bd586671a3c22eb2f07e55f11b3ce64e1f7961e7 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