XML External Entity (XXE) Injection Affecting php7-sysvsem package, versions <7.4.33-150200.3.60.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.11% (46th percentile)

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  • Snyk IDSNYK-SLES153-PHP7SYSVSEM-5878884
  • published1 Sept 2023
  • disclosed31 Aug 2023

Introduced: 31 Aug 2023

CVE-2023-3823  (opens in a new tab)
CWE-611  (opens in a new tab)

How to fix?

Upgrade SLES:15.3 php7-sysvsem to version 7.4.33-150200.3.60.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php7-sysvsem package and not the php7-sysvsem package as distributed by SLES. See How to fix? for SLES:15.3 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.

CVSS Scores

version 3.1