5.1

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2024-44337

CVE-2024-44337: Infinite loop in github.com/gomarkdown/markdown

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Prior to pseudoversion v0.0.0-20240729232818-a2a9c4f, which corresponds with commit a2a9c4f76ef5a5c32108e36f7c47f8d310322252, there was a logical problem in the paragraph function of the parser/block.go file, which allowed a remote attacker to cause a denial of service (DoS) condition by providing a tailor-made input that caused an infinite loop, causing the program to hang and consume resources indefinitely. Submit a2a9c4f76ef5a5c32108e36f7c47f8d310322252 contains fixes to this problem.

(GitHub Advisory)

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CVE-2024-44337

CVE-2024-44337:

5.1

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/gomarkdown/markdown	go	< 0.0.0-20240729212818-a2a9c4f76ef5	0.0.0-20240729212818-a2a9c4f76ef5

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability description explicitly mentions a logical problem in the paragraph function of parser/block.go. The provided commit a2a9c4f76ef5a5c32108e36f7c47f8d310322252 shows a modification within this exact function. The patch introduces a check if listLen > 0 before returning from a conditional block related to definition lists. This suggests that previously, if listLen was zero, the function might have returned a value that did not advance the parsing state correctly, leading to an infinite loop when processing specially crafted input. The function signature is derived from the Go package structure and the method receiver p *Parser.

The test case added in parser/parser_test.go (TestBug311) further confirms this by providing specific input that would trigger the bug, and calling p.Parse([]byte(str)), which in turn would call the vulnerable paragraph function during the parsing process. While Parse itself is an entry point, the core vulnerability lies within paragraph as identified by the patch and description.

Vulnerable functions

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WAF Rule

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Reasoning

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