Use After Free Affecting nokogiri package, versions <1.13.2


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    EPSS
    0.54% (78th percentile)

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  • Snyk ID SNYK-RUBY-NOKOGIRI-2413994
  • published 23 Feb 2022
  • disclosed 20 Feb 2022
  • credit Shinji Sato

How to fix?

Upgrade nokogiri to version 1.13.2 or higher.

Overview

nokogiri is a gem for parsing HTML, XML, SAX, and Reader.

Affected versions of this package are vulnerable to Use After Free via the ID and IDREF attributes, when using the xmlReader interface with validation or when a document is parsed with XML_PARSE_DTDVALID and without XML_PARSE_NOENT. This can lead to the value of ID attributes to not be normalized after potentially expanding entities in xmlRemoveID, which will cause later calls to xmlGetID to return a pointer to previously freed memory.

CVSS Scores

version 3.1
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Snyk

Recommended
8.1 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
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NVD

7.5 high
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SUSE

7 high
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Red Hat

8.1 high