CVE-2022-29181 — Improper Handling of Unexpected Data Type in Nokogiri

Affected: sparklemotion nokogiri

Nokogiri is an open source XML and HTML library for Ruby. Nokogiri prior to version 1.13.6 does not type-check all inputs into the XML and HTML4 SAX parsers, allowing specially crafted untrusted inputs to cause illegal memory access errors (segfault) or reads from unrelated memory. Version 1.13.6 contains a patch for this issue. As a workaround, ensure the untrusted input is a `String` by calling `#to_s` or equivalent.

GHSA-xh29-r2w5-wx8m — Nokogiri Improperly Handles Unexpected Data Type

Affected: RubyGems: nokogiri

### Summary

Nokogiri `< v1.13.6` does not type-check all inputs into the XML and HTML4 SAX parsers. For CRuby users, this may allow specially crafted untrusted inputs to cause illegal memory access errors (segfault) or reads from unrelated memory.

### Severity

The Nokogiri maintainers have evaluated this as **High 8.2** (CVSS3.1).

### Mitigation

CRuby users should upgrade to Nokogiri `>= 1.13.6`.

JRuby users are not affected.

### Workarounds

To avoid this vulnerability in affected applications, ensure the untrusted input is a `String` by calling `#to_s` or equivalent.

### Credit

This vulnerability was responsibly reported by @agustingianni and the Github Security Lab.

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CVE-2022-29181 — Improper Handling of Unexpected Data Type in Nokogiri

GHSA-xh29-r2w5-wx8m — Nokogiri Improperly Handles Unexpected Data Type