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Advisories

Nokogiri before 1.19.1 Unchecked Return Value canonicalize

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severity
medium
date
Affecting

  • nokogiri >= 1.5.1, < 1.19.1

CWE
  • CWE-252 Unchecked Return Value
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Description
Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid canonicalized XML that is incorrectly accepted as valid.

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