3.7

CVSS Score

3.1

-

CVSS Score

Basic Information

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GHSA-wgxp-q8xq-wpp9

GHSA-wgxp-q8xq-wpp9: ImageMagick: Malicious PCD files trigger 1‑byte heap Out-of-bounds Read and DoS

The PCD coder’s DecodeImage loop allows a crafted PCD file to trigger a 1‑byte heap out-of-bounds read when decoding an image (Denial of service) and potential disclosure of adjacent heap byte.

(GitHub Advisory)

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GHSA-wgxp-q8xq-wpp9

GHSA-wgxp-q8xq-wpp9:

3.7

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
Magick.NET-Q16-AnyCPU	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-AnyCPU	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-OpenMP-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-OpenMP-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-x86	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-OpenMP-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-OpenMP-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-OpenMP-x86	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-x86	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-AnyCPU	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-OpenMP-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-OpenMP-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-x86	nuget	< 14.10.3	14.10.3

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The analysis of the provided patch clearly indicates a vulnerability within the DecodeImage function in coders/pcd.c. The vulnerability is a classic out-of-bounds read error. The original code accessed a memory location using a pointer q without first ensuring that the pointer was within the allocated buffer luma. This flaw could be triggered by a specially crafted PCD image file, leading to a crash (Denial of Service) or potentially leaking a single byte of memory from the heap. The fix is straightforward: the boundary check for the pointer q is moved to before the point of access, thus preventing the out-of-bounds read. The vulnerable function is therefore DecodeImage, as it is the function containing the flawed logic.

Vulnerable functions

DecodeImage

coders/pcd.c

The vulnerability exists in the `DecodeImage` function within the `coders/pcd.c` file. The code was performing a read operation using the pointer `q` before verifying if this pointer was within the valid memory bounds of the `luma` buffer. This could be exploited by a crafted PCD file to cause a 1-byte heap out-of-bounds read, leading to a denial of service or potential disclosure of information. The patch corrected this by moving the boundary check `if ((q < luma) || (q >= sentinel))` to before the memory access, ensuring the pointer is validated before being used.

Vulnerability Intelligence
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WAF Protection Rules

WAF Rule

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Reasoning

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