CVE-2022-23476: Unchecked return value from xmlTextReaderExpand in Nokogiri
Nokogiri is an open source XML and HTML library for the Ruby programming language. Nokogiri 1.13.8 and 1.13.9 fail to check the return value from xmlTextReaderExpand in the method Nokogiri::XML::Reader#attributehash. This can lead to a null pointer exception when invalid markup is being parsed. For applications using XML::Reader to parse untrusted inputs, this may potentially be a vector for a denial of service attack. Users are advised to upgrade to Nokogiri >= 1.13.10. Users may be able to search their code for calls to either XML::Reader#attributes or XML::Reader#attributehash to determine if they are affected.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2022-23476?
CVE-2022-23476 is a vulnerability in the Nokogiri library for Ruby that can lead to a null pointer exception when invalid markup is being parsed.
How does CVE-2022-23476 affect Nokogiri?
CVE-2022-23476 affects Nokogiri versions 1.13.8 and 1.13.9.
What is the severity of CVE-2022-23476?
CVE-2022-23476 has a severity rating of 7.5 (high).
How can I fix CVE-2022-23476?
To fix CVE-2022-23476, you should update Nokogiri to a version that includes the necessary security patches.
Where can I find more information about CVE-2022-23476?
You can find more information about CVE-2022-23476 in the references section, which includes links to the GitHub commits and security advisories.