Improper Encoding or Escaping of Output Affecting expat package, versions <2.2.9-1ubuntu0.2


Severity

Recommended
high

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    1.47% (87th percentile)

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  • Snyk ID SNYK-UBUNTU2004-EXPAT-2403934
  • published 16 Feb 2022
  • disclosed 16 Feb 2022

How to fix?

Upgrade Ubuntu:20.04 expat to version 2.2.9-1ubuntu0.2 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 Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.

CVSS Scores

version 3.1
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NVD

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

7.5 high
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Red Hat

9.8 critical