CVE-2024-0229 – This vulnerability in the X.Org server allows o... (How to Fix)

Q: What is the severity of CVE-2024-0229?

CVE-2024-0229 has a CVSS score of 7.8 (HIGH). This vulnerability in the X.Org server allows out-of-bounds memory access when a frozen device is reattached to a different master device. It can lead to application crashes, local privilege escalation (if the server runs with elevated privileges), or remote code execution via SSH X11 forwarding. Systems running vulnerable X.Org server versions with X11 enabled are affected.

📋 TL;DR

This vulnerability in the X.Org server allows out-of-bounds memory access when a frozen device is reattached to a different master device. It can lead to application crashes, local privilege escalation (if the server runs with elevated privileges), or remote code execution via SSH X11 forwarding. Systems running vulnerable X.Org server versions with X11 enabled are affected.

💻 Affected Systems

Products:

X.Org X Server

Versions: Specific versions not specified in references, but Red Hat advisories indicate affected versions in RHEL 7, 8, and 9.

Operating Systems: Linux distributions using X.Org server, particularly Red Hat Enterprise Linux and derivatives

Default Config Vulnerable: ⚠️ Yes

Notes: Systems with X11 enabled and using X.Org server are vulnerable. SSH X11 forwarding must be enabled for remote exploitation.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution via SSH X11 forwarding, potentially leading to full system compromise.

🟠

Likely Case

Application crashes or local privilege escalation on systems where X.Org runs with elevated privileges.

🟢

If Mitigated

Application crash without privilege escalation if X.Org runs with minimal privileges.

🌐 Internet-Facing: MEDIUM - Requires SSH X11 forwarding to be enabled and accessible from untrusted networks.

🏢 Internal Only: HIGH - Local attackers or malicious users could exploit this for privilege escalation.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires specific conditions: a device frozen by a sync grab being reattached to a different master device. Local access or SSH X11 forwarding is needed.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Red Hat advisories for specific patched versions (e.g., RHSA-2024:0320, RHSA-2024:0557, etc.).

Vendor Advisory: https://access.redhat.com/errata/RHSA-2024:0320

Restart Required: Yes

Instructions:

1. Update X.Org server packages using your distribution's package manager. 2. For RHEL: 'sudo yum update xorg-x11-server*'. 3. Restart the X server or reboot the system.

🔧 Temporary Workarounds

Disable SSH X11 Forwarding

linux

Prevents remote exploitation via SSH by disabling X11 forwarding.

Edit /etc/ssh/sshd_config and set 'X11Forwarding no'
Restart SSH: 'sudo systemctl restart sshd'

Run X.Org with Minimal Privileges

linux

Reduce impact by running X server with lower privileges to prevent local privilege escalation.

Configure X server to run as non-root user if possible

🧯 If You Can't Patch

Disable X11 entirely if not needed, especially on servers.
Restrict SSH access and disable X11 forwarding for all users.

🔍 How to Verify

Check if Vulnerable:

Check X.Org server version: 'Xorg -version'. Compare with patched versions in Red Hat advisories.

Check Version:

Xorg -version 2>&1 | grep -i version

Verify Fix Applied:

Verify updated package version: 'rpm -q xorg-x11-server*' (RHEL) or equivalent for your distribution.

📡 Detection & Monitoring

Log Indicators:

X server crashes in /var/log/Xorg.0.log
Unexpected device reattachment events

Network Indicators:

SSH connections with X11 forwarding enabled from suspicious sources

SIEM Query:

source="/var/log/Xorg.0.log" AND "segmentation fault" OR "crash"

📊 Metadata

CVE ID: CVE-2024-0229

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-787

Published: February 9, 2024

Last Updated: November 4, 2025

🔗 References

https://access.redhat.com/errata/RHSA-2024:0320 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0557 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0558 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0597 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0607 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0614 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0617 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0621 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0626 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0629 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2169 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2170 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2995 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2996 Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:12751
https://access.redhat.com/security/cve/CVE-2024-0229 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2256690 Issue Tracking,Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0320 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0557 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0558 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0597 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0607 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0614 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0617 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0621 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0626 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:0629 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2169 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2170 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2995 Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2996 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2024-0229 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2256690 Issue Tracking,Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00016.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5J4H7CH565ALSZZYKOJFYDA5KFLG6NUK/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EJBMCWQ54R6ZL3MYU2D2JBW6JMZL7BQW/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IZ75X54CN4IFYMIV7OK3JVZ57FHQIGIC/

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📋 TL;DR

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⚠️ Risk & Real-World Impact

Worst Case

Likely Case

If Mitigated

🎯 Exploit Status

🛠️ Fix & Mitigation

✅ Official Fix

Instructions:

🔧 Temporary Workarounds

Disable SSH X11 Forwarding

Run X.Org with Minimal Privileges

🧯 If You Can't Patch

🔍 How to Verify

Check if Vulnerable:

Check Version:

Verify Fix Applied:

📡 Detection & Monitoring

Log Indicators:

Network Indicators:

SIEM Query:

📊 Metadata

🔗 References

📤 Share & Export

🔗 Related Vulnerabilities