Public on 2023-08-11
Modified on 2024-03-04
In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded. This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down.
Important severity
CVSS v3 Base Score
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core php Pending Fix
Amazon Linux 2 - Php8.0 Extra php 2023-09-06 ALAS2PHP8.0-2023-009 Fixed
Amazon Linux 2 - Php8.1 Extra php 2023-09-06 ALAS2PHP8.1-2023-004 Fixed
Amazon Linux 2 - Php8.2 Extra php 2023-09-06 ALAS2PHP8.2-2023-002 Fixed
Amazon Linux 1 php56 Pending Fix
Amazon Linux 2023 php8.1 2023-08-31 ALAS2023-2023-325 Fixed
Amazon Linux 2023 php8.2 2023-08-31 ALAS2023-2023-324 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H