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Published 20 hours ago • verified publisher icon nasa

Patched Integer overflow in cmark-gfm leads to heap memory corruption CWE-190

Open imhunterand opened this issue 2 years ago • 0 comments

CommonMarker uses cmark-gfm for rendering Github Flavored Markdown. An integer overflow in cmark-gfm's table row parsing may lead to heap memory corruption when parsing tables who's marker rows contain more than UINT16_MAX columns. The impact of this heap corruption ranges from Information Leak to Arbitrary Code Execution.

If affected versions of CommonMarker are used for rendering remote user controlled markdown, this vulnerability may lead to Remote Code Execution (RCE).

Patches

This vulnerability has been patched in the following CommonMarker release: v0.23.4

References

GHSA-mc3g-88wq-6f4x Acknowledgements We would like to thank Felix Wilhelm of Google's Project Zero for reporting this vulnerability

For more information

If you have any questions or comments about this advisory:

Open an issue in CommonMarker

imhunterand avatar Aug 12 '22 04:08 imhunterand