CVE-2021-40211 Denial of service in n/a
High 7.5
Published
Updated
Check this codebase for CVE-2021-40211 and fix it if it is affected.
What it is: CVE-2021-40211 is a high-severity denial of service vulnerability in Imagemagick Imagemagick, published on 22 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-40211 exists.
Affected product: Imagemagick Imagemagick. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2021-40211/ (Markdown: https://insights.sbomify.com/CVE-2021-40211/index.md)
A division by zero error in ImageMagick allows attackers to cause a denial of service via a crafted EMF file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-40211?
CVE-2021-40211 is a high-severity denial of service vulnerability in Imagemagick Imagemagick, published on 22 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered with ImageMagick 7.1.0-4 via Division by zero in function ReadEnhMetaFile of coders/emf.c.
Weakness: CWE-369
Which versions are affected by CVE-2021-40211?
It affects 1 product.
Linux distribution packages (28)
ImageMagick Red Hat:enterprise_linux:7::client | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-c++ Red Hat:enterprise_linux:7::client | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-c++-devel Red Hat:enterprise_linux:7::client | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-devel Red Hat:enterprise_linux:7::client | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-doc Red Hat:enterprise_linux:7::client | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-perl Red Hat:enterprise_linux:7::client | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick Red Hat:enterprise_linux:7::computenode | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-c++ Red Hat:enterprise_linux:7::computenode | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-c++-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-doc Red Hat:enterprise_linux:7::computenode | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-perl Red Hat:enterprise_linux:7::computenode | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick Red Hat:enterprise_linux:7::server | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-c++ Red Hat:enterprise_linux:7::server | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-c++-devel Red Hat:enterprise_linux:7::server | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-devel Red Hat:enterprise_linux:7::server | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-doc Red Hat:enterprise_linux:7::server | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-perl Red Hat:enterprise_linux:7::server | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick Red Hat:enterprise_linux:7::workstation | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-c++ Red Hat:enterprise_linux:7::workstation | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-c++-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-doc Red Hat:enterprise_linux:7::workstation | All versions | 0:6.9.10.68-7.el7_9 |
ImageMagick-perl Red Hat:enterprise_linux:7::workstation | All versions | 0:6.9.10.68-7.el7_9 |
Products include Imagemagick Imagemagick.
How do I fix CVE-2021-40211?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-40211 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-40211 exists.
Other vulnerabilities in Imagemagick Imagemagick
Sources
Also known as DEBIAN-CVE-2021-40211, GHSA-hv6g-hv36-gg9f, RHSA-2023:5461, UBUNTU-CVE-2021-40211.