CVE-2023-42821

Date: September 22, 2023

The package "github.com/gomarkdown/markdown" is a Go library for parsing Markdown text and rendering as HTML. Prior to pseudoversion "0.0.0-20230922105210-14b16010c2ee", which corresponds with commit "14b16010c2ee7ff33a940a541d993bd043a88940", parsing malformed markdown input with parser that uses parser.Mmark extension could result in out-of-bounds read vulnerability. To exploit the vulnerability, parser needs to have "parser.Mmark" extension set. The panic occurs inside the "citation.go" file on the line 69 when the parser tries to access the element past its length. This can result in a denial of service. Commit "14b16010c2ee7ff33a940a541d993bd043a88940"/pseudoversion "0.0.0-20230922105210-14b16010c2ee" contains a patch for this issue.

Language: Go