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{"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\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-28834"], "statement": "Red Hat supported products are not affected by this flaw because they do not ship rubygem-kramdown.", "threat_severity": "Moderate", "upstream_fix": "rubygem-kramdown 2.3.1"}