Bug 2153279 (CVE-2022-23476)

Summary:	CVE-2022-23476 rubygem-nokogiri: Denial of service
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akarol, akostadi, amackenz, amasferr, amctagga, anthomas, aoconnor, bbuckingham, bcourt, bniver, btotty, cbartlet, chazlett, dmayorov, dmetzger, ehelms, flucifre, ggainey, gmccullo, gmeno, groman, gtanzill, jhardy, jlledo, jsherril, juwatts, lzap, mbenjamin, mhackett, mhulan, mkudlej, mmakovy, myarboro, nmoumoul, orabin, osousa, pantinor, pcreech, rchan, roliveri, ruby-maint, simaishi, smallamp, sostapov, tjochec, tmalecek, tsedmik, vereddy
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	rubygem-nokogiri 1.13.10	Doc Type:	---
Doc Text:	A denial of service flaw was found in rubygem-nokogiri. When parsing invalid markup, a NULL pointer exception may occur, which is a potential vector for a denial of service attack.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-12-15 16:18:06 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2353493, 2353494, 2421650, 2152067, 2153280, 2353492
Bug Blocks:	2151925

Description ybuenos 2022-12-14 12:32:50 UTC

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.

Comment 1 ybuenos 2022-12-14 12:33:05 UTC

Created rubygem-nokogiri tracking bugs for this issue:

Affects: fedora-all [bug 2153280]

Comment 2 Product Security DevOps Team 2022-12-15 16:18:03 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-23476