#VU70042 NULL pointer dereference in Nokogiri - CVE-2022-23476
Published: December 8, 2022
Vulnerability identifier: #VU70042
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-23476
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Nokogiri
Nokogiri
Software vendor:
nokogiri.org
nokogiri.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the Nokogiri::XML::Reader#attribute_hash method when parsing input returned from "xmlTextReaderExpand". A remote attacker can pass specially crafted XML input to the application and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.
External links
- https://github.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50
- https://github.com/sparklemotion/nokogiri/commit/85410e38410f670cbbc8c5b00d07b843caee88ce
- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-qv4q-mr5r-qprj
- https://github.com/sparklemotion/nokogiri/releases/tag/v1.13.10