High severity · published Dec 8, 2022
CVE-2022-23476
Unchecked return value from xmlTextReaderExpand in Nokogiri
7.5
CVSS
1.8%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
nokogiri · sparklemotion
>= 1.13.8, < 1.13.10 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-23476
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-23476
Patch
https://github.com/sparklemotion/nokogiri/commit/85410e38410f670cbbc8c5b00d07b843caee88ce
Patch
https://github.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50
Third Party Advisory
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-qv4q-mr5r-qprj
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