Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') Affecting python3-libxml2-python package, versions <2.9.7-150000.3.57.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating

    Threat Intelligence

    EPSS
    0.08% (36th percentile)

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  • Snyk ID SNYK-SLES151-PYTHON3LIBXML2PYTHON-5488004
  • published 27 Apr 2023
  • disclosed 26 Apr 2023

How to fix?

Upgrade SLES:15.1 python3-libxml2-python to version 2.9.7-150000.3.57.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-libxml2-python package and not the python3-libxml2-python package as distributed by SLES. See How to fix? for SLES:15.1 relevant fixed versions and status.

A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

CVSS Scores

version 3.1
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NVD

6.5 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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SUSE

6.5 medium
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Red Hat

6.5 medium