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

Quick assessment

Affected
github cmark-gfm
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

cmark-gfm是CommonMark的 C 参考实现的扩展版本，是带有规范的 Markdown 语法的合理化版本。 cmark-gfm 存在输入验证错误漏洞，该漏洞可能会导致使用受影响的 cmark-gfm 库版本的应用程序中的远程代码执行 (RCE)。

CVSS 8.8 · High EPSS 4.51% · P91

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-24724

Vulnerability Information
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Vulnerability Title
Integer overflow in table parsing extension leads to heap memory corruption
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
cmark-gfm 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
cmark-gfm是CommonMark的 C 参考实现的扩展版本，是带有规范的 Markdown 语法的合理化版本。 cmark-gfm 存在输入验证错误漏洞，该漏洞可能会导致使用受影响的 cmark-gfm 库版本的应用程序中的远程代码执行 (RCE)。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
github cmark-gfm < 0.28.3.gfm.21 -

II. Public POCs for CVE-2022-24724

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III. Intelligence Information for CVE-2022-24724

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Vendor Advisories for CVE-2022-24724 (1)

Exploits & Public PoCs for CVE-2022-24724 (1)

Mailing List Discussions for CVE-2022-24724 (5)

IV. Related Vulnerabilities

Same product: cmark-gfm
Same vendor: github
Same weakness: CWE-190

V. Comments for CVE-2022-24724

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