Security issue with external entity loading in XML without enabling it
Summary
Security issue with external entity loading in XML without enabling it
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2023-3823 php7.4 Fixed in: 7.4.33-1+deb11u5
References
- advisory github.com
- advisory nvd.nist.gov
- advisory security.netapp.com
- advisory github.com
- web lists.debian.org
- web lists.fedoraproject.org