GHSA-p27m-hp98-6637 is a medium-severity (CVSS 5.3) CWE-674 vulnerability in Magick.NET-Q16-AnyCPU. A fix is available for Magick.NET-Q16-AnyCPU — see the affected versions and patch details below.
ImageMagick's failure to limit the depth of SVG file reads caused a DoS attack
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-p27m-hp98-6637.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-p27m-hp98-6637 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 379,842 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
Magick.NET-Q16-AnyCPU.NETMagick.NET-Q16-HDRI-AnyCPU.NETMagick.NET-Q16-HDRI-x86.NETMagick.NET-Q16-x86.NETMagick.NET-Q8-AnyCPU.NETMagick.NET-Q8-x86.NETMagick.NET-Q8-arm64.NETMagick.NET-Q8-OpenMP-x64+9 moreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.
Description
Summary
Using Magick to read a malicious SVG file resulted in a DoS attack.
Details
bt obtained using gdb:
#4 0x0000555555794c9c in ResizeMagickMemory (memory=0x7fffee203800, size=391344) at MagickCore/memory.c:1443
#5 0x0000555555794e5a in ResizeQuantumMemory (memory=0x7fffee203800, count=48918, quantum=8)
at MagickCore/memory.c:1508
#6 0x0000555555acc8ed in SVGStartElement (context=0x517000000080, name=0x5190000055e3 "g", attributes=0x0)
at coders/svg.c:1254
#7 0x00007ffff6799b1c in xmlParseStartTag () at /lib/x86_64-linux-gnu/libxml2.so.2
#8 0x00007ffff68c7bb8 in () at /lib/x86_64-linux-gnu/libxml2.so.2
#9 0x00007ffff67a03f1 in xmlParseChunk () at /lib/x86_64-linux-gnu/libxml2.so.2
This is related to the SVGStartElement and ResizeQuantumMemory functions.
PoC
-
Generate an SVG file
-
Read this file using Magick:
./magick /data/ylwang/Tools/LargeScan/targets/ImageMagick/test++/1.svg null
- Causes a DoS Attack
My server has a large amount of memory, causing a stack overflow to take a long time. I'll use the Windows release version as an example:
PS C:\Program Files\ImageMagick-7.1.2-Q8> .\magick.exe -ping 1.svg null:
PS C:\Program Files\ImageMagick-7.1.2-Q8> echo $LASTEXITCODE
-1073741571
The error code -1073741571 indicates a crash due to a stack overflow.
Impact
This is a DoS vulnerability and all applications using Magick to parse SVG files are affected.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | Magick.NET-Q16-AnyCPU | all versions | 14.10.1dotnet add package Magick.NET-Q16-AnyCPU --version 14.10.1 |
| .NETNuGet | Magick.NET-Q16-HDRI-AnyCPU | all versions | 14.10.1dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.10.1 |
| .NETNuGet | Magick.NET-Q16-HDRI-x86 | all versions | 14.10.1dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.10.1 |
| .NETNuGet | Magick.NET-Q16-x86 | all versions | 14.10.1dotnet add package Magick.NET-Q16-x86 --version 14.10.1 |
| .NETNuGet | Magick.NET-Q8-AnyCPU | all versions | 14.10.1dotnet add package Magick.NET-Q8-AnyCPU --version 14.10.1 |
| .NETNuGet | Magick.NET-Q8-x86 | all versions | 14.10.1dotnet add package Magick.NET-Q8-x86 --version 14.10.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Magick.NET-Q16-AnyCPU, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update Magick.NET-Q16-AnyCPU to 14.10.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-p27m-hp98-6637 is resolved across your whole dependency graph.
Workarounds
Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-p27m-hp98-6637 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-p27m-hp98-6637. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
This vulnerability is rated Moderate for Red Hat. A denial of service can occur in ImageMagick when processing a specially crafted malicious SVG file. This flaw can be exploited by an attacker providing a malicious SVG file, leading to the software becoming unavailable.
To mitigate this issue, avoid processing untrusted SVG files with ImageMagick. If processing untrusted SVG content is unavoidable, consider implementing sandboxing mechanisms for applications that utilize ImageMagick to limit the potential impact of a denial of service.Source: Red Hat security advisory for GHSA-p27m-hp98-6637 (CC BY 4.0)
Frequently Asked Questions
Is GHSA-p27m-hp98-6637 in your dependencies?
O3 Security finds GHSA-p27m-hp98-6637 across NuGet dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.