5.3

CVSS Score

3.1

-

CVSS Score

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GHSA-rxmq-m78w-7wmc

GHSA-rxmq-m78w-7wmc: SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks

Impact

A specially crafted GIF file containing a malformed comment extension block (with a missing block terminator) can cause the ImageSharp GIF decoder to enter an infinite loop while attempting to skip the block. This leads to a denial of service. Applications processing untrusted GIF input should upgrade to a patched version.

Patches

The problem has been patched. All users are advised to upgrade to v3.1.11 or v2.1.11.

Workarounds

None.

(GitHub Advisory)

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GHSA-rxmq-m78w-7wmc

GHSA-rxmq-m78w-7wmc:

5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
SixLabors.ImageSharp	nuget	< 2.1.11	2.1.11
SixLabors.ImageSharp	nuget	>= 3.0.0, < 3.1.11	3.1.11

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The analysis of the provided patches in commits 55e49262df9a057dff9b7807ed1b7bdb49187c3f and 833f3ceec35af6b775950e06f03b934546cefbf6 points to a single vulnerable function. The vulnerability, an infinite loop leading to a denial of service, is located in the SixLabors.ImageSharp.Formats.Gif.GifDecoderCore.ReadComments function. The patch introduces a crucial check for an end-of-stream condition while reading GIF comment sub-blocks. The absence of this check in the vulnerable version leads to an infinite loop when a specially crafted GIF with a malformed comment extension is processed. Therefore, any runtime profile or stack trace generated during the exploitation of this vulnerability would show the SixLabors.ImageSharp.Formats.Gif.GifDecoderCore.ReadComments function as the point of failure.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

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WAF Protection Rules

WAF Rule

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Reasoning

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5.3

-

Basic Information

Basic Information

Concerned about an active attack path?

GHSA-rxmq-m78w-7wmc: SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks

Impact

Patches

Workarounds

GHSA-rxmq-m78w-7wmc:

5.3

-

Basic Information

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Technical Details

Technical Details

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Root Cause Analysis

Vulnerable functions

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WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

5.3

5.3

GHSA-rxmq-m78w-7wmc: SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks

Impact

Patches

Workarounds

Basic Information

Basic Information

Technical Details

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
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