A vulnerability has been found in simple-markdown 0.5.1 and classified as problematic. Affected by this vulnerability is some unknown processing of the file simple-markdown.js. The manipulation with an unknown input leads to a redos vulnerability. The CWE definition for the vulnerability is CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. As an impact it is known to affect availability.

The weakness was shared 02/11/2023 as 89797fef9abb4cab2fb76a335968266a92588816. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2019-25103. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1449.003 according to MITRE ATT&CK.

Upgrading to version 0.5.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 89797fef9abb4cab2fb76a335968266a92588816 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. The advisory contains the following remark:

Our inline code regex had overlapping parts in the case of spaces; spaces could be parsed as part of the `\s*`s or as part of the `[\S\s]*`, which leads to catastrophic backtracking in the case of a string

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• simple-markdown

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• open-source

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• 🔒

CPE 2.2info

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