Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Php | Php | >= 8.0.0, < 8.0.30 |
| Fedoraproject | Fedora | 38 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://github.com/php/php-src/security/advisories/GHSA-3qrf-m4j2-pcrrExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00002.htmlMailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://security.netapp.com/advisory/ntap-20230825-0001/Third Party Advisory
- https://github.com/php/php-src/security/advisories/GHSA-3qrf-m4j2-pcrrExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00002.htmlMailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://security.netapp.com/advisory/ntap-20230825-0001/Third Party Advisory
FAQ
What is CVE-2023-3823?
CVE-2023-3823 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 ...
How severe is CVE-2023-3823?
CVE-2023-3823 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-3823?
Check the references section above for vendor advisories and patch information. Affected products include: Php Php, Fedoraproject Fedora, Debian Debian Linux.