CVE-2022-24724 : Exploit Details and Defense Strategies

This article discusses CVE-2022-24724, a vulnerability in cmark-gfm affecting versions prior to 0.29.0.gfm.3 and 0.28.3.gfm.21.

Understanding CVE-2022-24724

CVE-2022-24724 is an integer overflow vulnerability in cmark-gfm's table row parsing that could result in heap memory corruption.

What is CVE-2022-24724?

cmark-gfm, GitHub's extended version of the C reference implementation of CommonMark, is impacted by an integer overflow issue in table row parsing, potentially leading to various risks, including Arbitrary Code Execution.

The Impact of CVE-2022-24724

The impact of this vulnerability in cmark-gfm ranges from Information Leak to Remote Code Execution (RCE) in applications using affected versions of the library.

Technical Details of CVE-2022-24724

The vulnerability exists in the table markdown extensions of cmark-gfm.

Vulnerability Description

cmark-gfm's table row parsing function

row_from_string

can trigger heap memory corruption due to an integer overflow when processing tables with excessive columns.

Affected Systems and Versions

The vulnerability affects cmark-gfm versions prior to 0.29.0.gfm.3 and 0.28.3.gfm.21.

Exploitation Mechanism

Exploiting this vulnerability can lead to various levels of impact, including Arbitrary Code Execution.

Mitigation and Prevention

Taking immediate steps, adopting long-term security practices, and applying relevant patches are crucial.

Immediate Steps to Take

To mitigate the risk posed by CVE-2022-24724, consider updating cmark-gfm to patched versions 0.29.0.gfm.3 or 0.28.3.gfm.21.

Long-Term Security Practices

Enforce secure coding practices and regularly update software components to prevent similar vulnerabilities.

Patching and Updates

Ensure timely application of security patches and stay informed about security advisories to protect against potential exploits.