CVE-2025-55212: Magick.NET Q16 AnyCPU " Leads To Crash Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fh55-q5pj-pxgw",
  "modified" : "2025-11-03T21:34:24Z",
  "published" : "2025-08-26T15:27:25Z",
  "aliases" : [ "CVE-2025-55212" ],
  "summary" : "ImageMagick affected by divide-by-zero in ThumbnailImage via montage -geometry \":\" leads to crash",
  "details" : "## Summary\nPassing a geometry string containing only a colon (\":\") to montage -geometry leads GetGeometry() to set width/height to 0. Later, ThumbnailImage() divides by these zero dimensions, triggering a crash (SIGFPE/abort), resulting in a denial of service.\n\n## Details\n**Root Cause**\n1. `montage -geometry \":\" ...` reaches `MagickCore/geometry.c:GetGeometry().`\n2. `StringToDouble/InterpretLocaleValue` parses `\":\"` as `0.0;` then: \nhttps://github.com/ImageMagick/ImageMagick/blob/0ba1b587be17543b664f7ad538e9e51e0da59d17/MagickCore/geometry.c#L355\n`WidthValue` (and/or `HeightValue)` is set with a zero dimension.\n3. In MagickCore/resize.c:ThumbnailImage(), the code computes:\nhttps://github.com/ImageMagick/ImageMagick/blob/0ba1b587be17543b664f7ad538e9e51e0da59d17/MagickCore/resize.c#L4625-L4629\ncausing a division by zero and immediate crash.\n\nThe issue is trivially triggerable without external input files (e.g., using `xc:white`).\n\n### Reproduction\nEnvironment\n```\nVersion: ImageMagick 7.1.2-1 (Beta) Q16-HDRI x86_64 0ba1b587b:20250812 https://imagemagick.org\nFeatures: Cipher DPC HDRI\nDelegates (built-in): bzlib fontconfig freetype jbig jng jpeg lcms lzma pangocairo png tiff x xml zlib\nCompiler: clang (14.0.0)\nOS/Arch: Linux x86_64\n```\nSteps\n```\n./bin/magick montage -geometry : xc:white null:\n```\nObserved result\n```\nIOT instruction (core dumped)\n# (Environment-dependent: SIGFPE/abort may be observed.)\n```\n\n## PoC\nNo external file required; the pseudo image xc:white suffices:\n```\n./bin/magick montage -geometry : xc:white null:\n```\n\n## Impact\n- **Denial of Service:** A divide-by-zero in `ThumbnailImage()` causes immediate abnormal termination (e.g., SIGFPE/abort), crashing the ImageMagick process.\n\n\n## Suggested fix\nDefensively reject zero dimensions early in `ThumbnailImage()`:\n```c\nif ((columns == 0) || (rows == 0)) {\n  (void) ThrowMagickException(exception, GetMagickModule(), OptionError,\n    \"InvalidGeometry\", \"thumbnail requires non-zero dimensions: %.20gx%.20g\",\n    (double) columns, (double) rows);\n  return (Image *) NULL;\n}\n```\nAdditionally, consider tightening validation in `GetGeometry()` so that colon-only (and similar malformed) inputs do not yield `WidthValue/HeightValue` with zero, or are rejected outright. Variants like `\"x:\"` or `\":x\"` may also need explicit handling (maintainer confirmation requested).\n\n## Credits\n### Team Daemon Fuzz Hunters\n**Bug Hunting Master Program, HSpace/Findthegap**\n<br>\n\n**Woojin Park**\n@jin-156\n[1203kids@gmail.com](mailto:1203kids@gmail.com)\n\n**Hojun Lee**\n@leehohojune \n[leehojune@korea.ac.kr](mailto:leehojune@korea.ac.kr)\n\n**Youngin Won**\n@amethyst0225\n[youngin04@korea.ac.kr](mailto:youngin04@korea.ac.kr)\n\n**Siyeon Han**\n@hanbunny\n[kokosyeon@gmail.com](mailto:kokosyeon@gmail.com)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-AnyCPU"
    },
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      "type" : "ECOSYSTEM",
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        "fixed" : "14.8.1"
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  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-HDRI-OpenMP-arm64"
    },
    "ranges" : [ {
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      "name" : "Magick.NET-Q16-HDRI-OpenMP-x64"
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  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-fh55-q5pj-pxgw"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-55212"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/commit/5f0bcf986b8b5e90567750d31a37af502b73f2af"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ImageMagick/ImageMagick"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/blob/0ba1b587be17543b664f7ad538e9e51e0da59d17/MagickCore/geometry.c#L355"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/blob/0ba1b587be17543b664f7ad538e9e51e0da59d17/MagickCore/resize.c#L4625-L4629"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dlemstra/Magick.NET/releases/tag/14.8.1"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2025/09/msg00012.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-369" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-08-26T15:27:25Z",
    "nvd_published_at" : "2025-08-26T17:15:39Z"
  }
}