{"schema_version":"1.9.0","id":"GHSA-qv4q-mr5r-qprj","published":"2022-12-08T03:03:33Z","modified":"2023-11-08T04:08:18.808326Z","aliases":["CVE-2022-23476"],"summary":"Unchecked return value from xmlTextReaderExpand","details":"## Summary\n\nNokogiri `1.13.8, 1.13.9` fails 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. \n\nFor applications using `XML::Reader` to parse untrusted inputs, this may potentially be a vector for a denial of service attack.\n\n\n## Mitigation\n\nUpgrade to Nokogiri `>= 1.13.10`.\n\nUsers 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.\n\n\n## Severity\n\nThe Nokogiri maintainers have evaluated this as [High Severity 7.5 (CVSS3.1)](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).\n\n\n## References\n\n- [CWE - CWE-252: Unchecked Return Value (4.9)](https://cwe.mitre.org/data/definitions/252.html)\n- [CWE - CWE-476: NULL Pointer Dereference (4.9)](https://cwe.mitre.org/data/definitions/476.html)\n\n\n## Credit\n\nThis vulnerability was responsibly reported by @davidwilemski.\n","affected":[{"package":{"name":"nokogiri","ecosystem":"RubyGems","purl":"pkg:gem/nokogiri"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.13.8"},{"fixed":"1.13.10"}]}],"versions":["1.13.8","1.13.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/12/GHSA-qv4q-mr5r-qprj/GHSA-qv4q-mr5r-qprj.json"}}],"references":[{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-qv4q-mr5r-qprj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23476"},{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/commit/85410e38410f670cbbc8c5b00d07b843caee88ce"},{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/commit/9fe0761c47c0d4270d1a5220cfd25de080350d50"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2022-23476.yml"},{"type":"PACKAGE","url":"https://github.com/sparklemotion/nokogiri"}],"database_specific":{"cwe_ids":["CWE-252","CWE-476"],"github_reviewed":true,"github_reviewed_at":"2022-12-08T03:03:33Z","nvd_published_at":"2022-12-08T04:15:00Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}