XML External Entity (XXE) Injection Affecting php8.2 package, versions <8.2.18-1~deb12u1
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Test your applications- Snyk ID SNYK-DEBIAN12-PHP82-5838879
- published 11 Aug 2023
- disclosed 11 Aug 2023
Introduced: 11 Aug 2023
CVE-2023-3823 Open this link in a new tabHow to fix?
Upgrade Debian:12 php8.2 to version 8.2.18-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream php8.2 package and not the php8.2 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2023-3823
- https://github.com/php/php-src/security/advisories/GHSA-3qrf-m4j2-pcrr
- https://lists.debian.org/debian-lts-announce/2023/09/msg00002.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7NBF77WN6DTVTY2RE73IGPYD6M4PIAWA/
- https://security.netapp.com/advisory/ntap-20230825-0001/