critical
9.8
CWE
190
Advisory Published
Updated

CVE-2022-24724: Integer overflow in table parsing extension leads to heap memory corruption

First published: Thu Mar 03 2022(Updated: )

cmark-gfm is GitHub's extended version of the C reference implementation of CommonMark. Prior to versions 0.29.0.gfm.3 and 0.28.3.gfm.21, an integer overflow in cmark-gfm's table row parsing `table.c:row_from_string` 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 depending on how and where `cmark-gfm` is used. If `cmark-gfm` is used for rendering remote user controlled markdown, this vulnerability may lead to Remote Code Execution (RCE) in applications employing affected versions of the `cmark-gfm` library. This vulnerability has been patched in the following cmark-gfm versions 0.29.0.gfm.3 and 0.28.3.gfm.21. A workaround is available. The vulnerability exists in the table markdown extensions of cmark-gfm. Disabling the table extension will prevent this vulnerability from being triggered.

Credit: security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
Github Cmark-gfm<0.28.3.gfm.21
Github Cmark-gfm>0.28.3.gfm.21<0.29.0.gfm.3
Fedoraproject Fedora=34
Fedoraproject Fedora=35
Fedoraproject Fedora=36

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Reference Links

Frequently Asked Questions

  • What is CVE-2022-24724?

    CVE-2022-24724 is an integer overflow vulnerability in cmark-gfm that may lead to heap memory corruption when parsing tables.

  • What is the severity of CVE-2022-24724?

    The severity of CVE-2022-24724 is critical (9.8 out of 10).

  • How does CVE-2022-24724 affect GitHub's cmark-gfm?

    GitHub's cmark-gfm versions up to 0.28.3.gfm.21 are affected by CVE-2022-24724.

  • How do I fix CVE-2022-24724 in cmark-gfm?

    Update cmark-gfm to version 0.29.0.gfm.3 or later to fix CVE-2022-24724.

  • Are Fedora 34, 35, and 36 affected by CVE-2022-24724?

    Yes, Fedora 34, 35, and 36 are affected by CVE-2022-24724.

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