CVE-2022-23476

Name	CVE-2022-23476
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ruby-nokogiri (PTS)	buster	1.10.0+dfsg1-2	fixed
	buster (security)	1.10.0+dfsg1-2+deb10u1	fixed
	bullseye	1.11.1+dfsg-2	fixed
	bookworm, sid	1.13.10+dfsg-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
ruby-nokogiri	source	buster	(not affected)
ruby-nokogiri	source	bullseye	(not affected)
ruby-nokogiri	source	(unstable)	1.13.10+dfsg-1

Notes

[bullseye] - ruby-nokogiri <not-affected> (Introduced in 1.13.8)
[buster] - ruby-nokogiri <not-affected> (Introduced in 1.13.8)
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-qv4q-mr5r-qprj
https://github.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50 (v1.13.10)