Vulnerability Description
A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| X.Org | X Server | < 21.1.7 |
| Fedoraproject | Fedora | 36 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux Aus | 8.4 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Eus | 8.4 |
| Redhat | Enterprise Linux For Ibm Z Systems | 7.0 |
| Redhat | Enterprise Linux For Ibm Z Systems Eus | 8.4 |
| Redhat | Enterprise Linux For Power Big Endian | 7.0 |
| Redhat | Enterprise Linux For Power Little Endian | 7.0 |
| Redhat | Enterprise Linux For Power Little Endian Eus | 8.4 |
| Redhat | Enterprise Linux For Scientific Computing | 7.0 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Server Aus | 8.2 |
| Redhat | Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions | 8.1 |
| Redhat | Enterprise Linux Server Tus | 8.2 |
| Redhat | Enterprise Linux Server Update Services For Sap Solutions | 8.2 |
| Redhat | Enterprise Linux Server Workstation | 7.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2165995Issue TrackingThird Party Advisory
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/0ba6d8c37071131a49790243cdaPatch
- https://lists.x.org/archives/xorg-announce/2023-February/003320.htmlMailing ListVendor Advisory
- https://security.gentoo.org/glsa/202305-30
- https://bugzilla.redhat.com/show_bug.cgi?id=2165995Issue TrackingThird Party Advisory
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/0ba6d8c37071131a49790243cdaPatch
- https://lists.x.org/archives/xorg-announce/2023-February/003320.htmlMailing ListVendor Advisory
- https://security.gentoo.org/glsa/202305-30
FAQ
What is CVE-2023-0494?
CVE-2023-0494 is a vulnerability with a CVSS score of 7.8 (HIGH). A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write i...
How severe is CVE-2023-0494?
CVE-2023-0494 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-0494?
Check the references section above for vendor advisories and patch information. Affected products include: X.Org X Server, Fedoraproject Fedora, Redhat Enterprise Linux, Redhat Enterprise Linux Aus, Redhat Enterprise Linux Desktop.