CVE-2021-4008 Memory corruption in xorg-x11-server
High 7.8
Published
Updated
Check this codebase for CVE-2021-4008 and fix it if it is affected.
What it is: CVE-2021-4008 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 17 Dec 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-2021-4008 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-2021-4008/ (Markdown: https://insights.sbomify.com/CVE-2021-4008/index.md)
An out-of-bounds access in the X11 server allows attackers to compromise data confidentiality, integrity, and 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-2021-4008?
CVE-2021-4008 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 17 Dec 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 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SProcRenderCompositeGlyphs function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Weakness: CWE-119
Which versions are affected by CVE-2021-4008?
It affects 3 products.
Linux distribution packages (34)
xorg-x11-server SUSE:Enterprise Storage 6 | All versions | 1.20.3-14.5.19.1 |
xorg-x11-server SUSE:HPE Helion OpenStack 8 | All versions | 7.6_1.18.3-76.43.1 |
xorg-x11-server SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 1.20.3-14.5.19.1 |
xorg-x11-server SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 1.20.3-14.5.19.1 |
xorg-x11-server SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 1.19.6-8.33.1 |
xorg-x11-server SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 1.19.6-8.33.1 |
xorg-x11-server SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 1.20.3-22.5.39.1 |
xorg-x11-server SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 1.20.3-22.5.39.1 |
xorg-x11-server SUSE:Linux Enterprise Module for Development Tools 15 SP2 | All versions | 1.20.3-22.5.39.1 |
xorg-x11-server SUSE:Linux Enterprise Module for Development Tools 15 SP3 | All versions | 1.20.3-22.5.39.1 |
xorg-x11-server SUSE:Linux Enterprise Point of Sale 11 SP3 | All versions | 7.4-27.122.43.1 |
xorg-x11-server SUSE:Linux Enterprise Server 11 SP4-LTSS | All versions | 7.4-27.122.43.1 |
xorg-x11-server SUSE:Linux Enterprise Server 12 SP2-BCL | All versions | 7.6_1.18.3-76.43.1 |
xorg-x11-server SUSE:Linux Enterprise Server 12 SP3-BCL | All versions | 7.6_1.18.3-76.43.1 |
xorg-x11-server SUSE:Linux Enterprise Server 12 SP3-LTSS | All versions | 7.6_1.18.3-76.43.1 |
xorg-x11-server SUSE:Linux Enterprise Server 12 SP4-LTSS | All versions | 1.19.6-4.25.1 |
xorg-x11-server SUSE:Linux Enterprise Server 12 SP5 | All versions | 1.19.6-10.26.1 |
xorg-x11-server SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 1.20.3-14.5.19.1 |
xorg-x11-server SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 1.20.3-14.5.19.1 |
xorg-x11-server SUSE:Linux Enterprise Server 15-LTSS | All versions | 1.19.6-8.33.1 |
xorg-x11-server SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 7.6_1.18.3-76.43.1 |
xorg-x11-server SUSE:Linux Enterprise Server for SAP Applications 12 SP4 | All versions | 1.19.6-4.25.1 |
xorg-x11-server SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 1.19.6-10.26.1 |
xorg-x11-server SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 1.19.6-8.33.1 |
xorg-x11-server SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 1.20.3-14.5.19.1 |
xorg-x11-server SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 1.19.6-10.26.1 |
xorg-x11-server SUSE:Linux Enterprise Workstation Extension 15 SP2 | All versions | 1.20.3-22.5.39.1 |
xorg-x11-server SUSE:Linux Enterprise Workstation Extension 15 SP3 | All versions | 1.20.3-22.5.39.1 |
xorg-x11-server SUSE:OpenStack Cloud 8 | All versions | 7.6_1.18.3-76.43.1 |
xorg-x11-server SUSE:OpenStack Cloud 9 | All versions | 1.19.6-4.25.1 |
xorg-x11-server SUSE:OpenStack Cloud Crowbar 8 | All versions | 7.6_1.18.3-76.43.1 |
xorg-x11-server SUSE:OpenStack Cloud Crowbar 9 | All versions | 1.19.6-4.25.1 |
xorg-x11-server openSUSE:Leap 15.2 | All versions | 1.20.3-lp152.8.33.1 |
xorg-x11-server openSUSE:Leap 15.3 | All versions | 1.20.3-22.5.39.1 |
Products include Debian Debian Linux, Fedoraproject Fedora, X.org X Server.
How do I fix CVE-2021-4008?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-4008 being exploited?
There is no known exploitation of CVE-2021-4008 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-44349, DEBIAN-CVE-2021-4008, GHSA-h4h6-8v79-695g, SUSE-SU-2021:14863-1, SUSE-SU-2021:4064-1, SUSE-SU-2021:4065-1 and 7 more.