CVE-2021-28834

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"FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S3BBLUIDCUUR3NEE4NJLOCCAV3ALQ3O6/"}, {"name": "FEDORA-2021-4c57a892d1", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SYOLQKFL6IJCQLBXV34Z4TI4O54GESPR/"}, {"name": "FEDORA-2021-edc673e864", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NJCJVYHPY6LNUFM6LYZIAUIYOMVT5QGV/"}, {"name": "DSA-4890", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2021/dsa-4890"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T21:55:11.772Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/gettalong/kramdown/pull/708"}, {"tags": ["x_refsource_MISC", "x_transferred"], 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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:kramdown_project:kramdown:*:*:*:*:*:ruby:*:*", "matchCriteriaId": "E6F23C23-B609-42B7-9D92-73BC4C61CC4A", "versionEndExcluding": "2.3.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated."}, {"lang": "es", "value": "Kramdown versiones anteriores a 2.3.1, no restringe los formateadores Rouge al espacio de nombres de Rouge::Formatters, y por lo tanto, pueden ser instancializadas clases arbitrarias"}], "id": "CVE-2021-28834", "lastModified": "2026-06-17T03:46:57.807", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-03-19T07:15:13.147", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/gettalong/kramdown/compare/REL_2_3_0...REL_2_3_1"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": 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{"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4890"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "rubygem-kramdown: allows arbitrary classes to be instantiated", "id": "1941044", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1941044"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-470", "details": ["Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated.", "A flaw was found in rubygem-kramdown. Rouge is a syntax highlighter used by kramdown. Restriction of the Rouge formatters to the Rouge::Formatters namespace does not occur when Ruby's const_get() method is called. This can lead to arbitrary classes being instantiated in situations where the application using kramdown, for example, accepts user input to select a Rogue syntax highlighter formatter. The highest threat from this vulnerability when exploited in a vulnerable configuration is to data confidentiality, integrity, and availability."], "mitigation": {"lang": "en:us", "value": "Developers using rubygem-kramdown: Do not pass user or external input into custom Rouge formatter selection logic.\nAll other users/system administrators: There is no known mitigation at this time."}, "name": "CVE-2021-28834", "public_date": "2021-03-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-28834"], "statement": "Red Hat supported products are not affected by this flaw because they do not ship rubygem-kramdown.", "threat_severity": "Moderate"}

{}