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CVE-2022-23476

7.5 · HIGH

Nokogiri is an open source XML and HTML library for the Ruby programming language.

Published Dec 8, 2022CWE-252EPSS 1.82%

Overview

CVE-2022-23476 is a high-severity vulnerability. It was published on December 8, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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#attribute_hash`. 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#attribute_hash` to determine if they are affected.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/sparklemotion/nokogiri/commit/85410e38410f670cbbc8c5b00d07b843caee88ceGitHubgithub.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50GitHubgithub.com/sparklemotion/nokogiri/security/advisories/GHSA-qv4q-mr5r-qprjGitHubgithub.com/sparklemotion/nokogiri/commit/85410e38410f670cbbc8c5b00d07b843caee88ceGitHubgithub.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50GitHubgithub.com/sparklemotion/nokogiri/security/advisories/GHSA-qv4q-mr5r-qprj

How CyberStrike helps

Frequently asked questions

What is CVE-2022-23476?

CVE-2022-23476 is a high-severity vulnerability. It was published on December 8, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2022-23476?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2022-23476?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-23476?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-23476 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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