ghsa-qv4q-mr5r-qprj
Vulnerability from github
Published
2022-12-08 03:03
Modified
2022-12-08 03:03
Severity ?
Summary
Unchecked return value from xmlTextReaderExpand
Details
Summary
Nokogiri 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.
For applications using XML::Reader
to parse untrusted inputs, this may potentially be a vector for a denial of service attack.
Mitigation
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.
Severity
The Nokogiri maintainers have evaluated this as High Severity 7.5 (CVSS3.1).
References
Credit
This vulnerability was responsibly reported by @davidwilemski.
{ "affected": [ { "package": { "ecosystem": "RubyGems", "name": "nokogiri" }, "ranges": [ { "events": [ { "introduced": "1.13.8" }, { "fixed": "1.13.10" } ], "type": "ECOSYSTEM" } ] } ], "aliases": [ "CVE-2022-23476" ], "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" }, "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 `\u003e= 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", "id": "GHSA-qv4q-mr5r-qprj", "modified": "2022-12-08T03:03:33Z", "published": "2022-12-08T03:03:33Z", "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" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "type": "CVSS_V3" } ], "summary": "Unchecked return value from xmlTextReaderExpand" }
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Sightings
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Nomenclature
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