Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') Affecting expat package, versions <2.6.0-1


Severity

Recommended
low

Based on Debian security rating

    Threat Intelligence

    EPSS
    0.05% (21st percentile)

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  • Snyk ID SNYK-DEBIANUNSTABLE-EXPAT-6227600
  • published 5 Feb 2024
  • disclosed 4 Feb 2024

How to fix?

Upgrade Debian:unstable expat to version 2.6.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

libexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.

CVSS Scores

version 3.1
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NVD

5.5 medium
  • Attack Vector (AV)
    Local
  • 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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Red Hat

5.5 medium