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CVE-2022-23476

Unchecked return value from xmlTextReaderExpand in Nokogiri

Published: Dec 8, 2022Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-252
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.7%
Top 26.1%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-252CWE-476

Affected Products

nokogirisparklemotion
Library
OSS Libraries / generic-library
nokogirinokogiri
Library
OSS Libraries / generic-library
nokogiriRubyGemsOSS Libraries
sparklemotionoss-projectOSS Libraries
nokogirioss-projectOSS Libraries
rubygemspackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Impact
Initial Access
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References

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-qv4q-mr5r-qprj
github.com
https://github.com/sparklemotion/nokogiri/commit/85410e38410f670cbbc8c5b00d07b843caee88ce
github.com
https://github.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50
github.com
and 3 more references View all →

Timeline

Published
Dec 8, 2022
Last Updated
Nov 21, 2024

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