CVE-2021-3472 Integer overflow in xorg-x11-server
High 7.8
Published
Updated
Check this codebase for CVE-2021-3472 and fix it if it is affected.
What it is: CVE-2021-3472 is a high-severity vulnerability in Debian Debian Linux, published on 26 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-3472 in the wild and no public exploit code.
Affected product: Debian Debian Linux. 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-2021-3472/ (Markdown: https://insights.sbomify.com/CVE-2021-3472/index.md)
An integer underflow in the Xorg X11 server allows local attackers to escalate privileges and compromise system availability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3472?
CVE-2021-3472 is a high-severity vulnerability in Debian Debian Linux, published on 26 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in xorg-x11-server in versions before 1.20.11. An integer underflow can occur in xserver which can lead to a local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Weakness: CWE-191
Which versions are affected by CVE-2021-3472?
It affects 4 products.
Linux distribution packages (40)
xorg-x11-server Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xdmx Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xephyr Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xnest Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xorg Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xvfb Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xwayland Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-common Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-devel Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-source Red Hat:enterprise_linux:7::client | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xdmx Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xephyr Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xnest Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xorg Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xvfb Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xwayland Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-common Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-source Red Hat:enterprise_linux:7::computenode | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xdmx Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xephyr Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xnest Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xorg Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xvfb Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xwayland Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-common Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-devel Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-source Red Hat:enterprise_linux:7::server | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server Red Hat:enterprise_linux:7::workstation | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xdmx Red Hat:enterprise_linux:7::workstation | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xephyr Red Hat:enterprise_linux:7::workstation | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xnest Red Hat:enterprise_linux:7::workstation | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xorg Red Hat:enterprise_linux:7::workstation | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xvfb Red Hat:enterprise_linux:7::workstation | All versions | 0:1.20.4-16.el7_9 |
xorg-x11-server-Xwayland Red Hat:enterprise_linux:7::workstation | All versions | 0:1.20.4-16.el7_9 |
Products include Debian Debian Linux, Fedoraproject Fedora, Redhat Enterprise Linux, X.org X Server.
How do I fix CVE-2021-3472?
Upgrade to a fixed version.
Is CVE-2021-3472 being exploited?
There is no known exploitation of CVE-2021-3472 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2021-3472, AZL-44133, DEBIAN-CVE-2021-3472, DLA-2627-1, DSA-4893-1, GHSA-cmmq-26gr-w7rc and 15 more.