Markdown Parsing Library Vulnerability Patched in gomarkdown

CVECVE-2023-42821
CVSScvssV3_1: 7.5
SourceCVE-2023-42821

A vulnerability was discovered in the popular Go Markdown parsing library gomarkdown. The library is used by many applications to convert Markdown text to HTML for display.

The vulnerability occurred due to improper input validation when parsing Markdown documents. Malformed input containing extra characters could cause the parser to read memory locations outside of the intended document, known as a buffer overread.

An attacker could exploit this by tricking a user or website into opening a specially crafted Markdown file. This may allow the attacker to access sensitive data stored nearby in memory or cause the application using the library to crash.

Developers using gomarkdown have been urged to update to the latest 0.0.0 release or later to patch this issue. The maintainers have fixed the input validation in the Markdown parser to prevent any out of bounds reads.

If you use any software that relies on gomarkdown, be sure to update to the latest version. Also practice basic security hygiene like keeping your applications and libraries updated. This will help prevent vulnerabilities from being exploited.

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