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Mapbox JavaScript API, a Leaflet Plugin
mapbox.com/mapbox.js/
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Remote code execution in Kramdown #1363

Open imhunterand opened 1 year ago

imhunterand commented 1 year ago

Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated.

CVE-2021-28834 GHSA-52p9-v744-mwjj

imhunterand commented 1 year ago

Additional Descriptions of Informations

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

Developers using rubygem-kramdown: Do not pass user or external input into custom Rouge formatter selection logic. All other users/system administrators: There is no known mitigation at this time. and approved this pull-request as merged for patched this issues.