Important: tigervnc

Issue Overview:

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. (CVE-2023-0494)

Affected Packages:

tigervnc

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update tigervnc to update your system.

New Packages:

aarch64:  
    tigervnc-1.8.0-24.amzn2.0.2.aarch64  
    tigervnc-server-1.8.0-24.amzn2.0.2.aarch64  
    tigervnc-server-minimal-1.8.0-24.amzn2.0.2.aarch64  
    tigervnc-server-module-1.8.0-24.amzn2.0.2.aarch64  
    tigervnc-debuginfo-1.8.0-24.amzn2.0.2.aarch64  
  
i686:  
    tigervnc-1.8.0-24.amzn2.0.2.i686  
    tigervnc-server-1.8.0-24.amzn2.0.2.i686  
    tigervnc-server-minimal-1.8.0-24.amzn2.0.2.i686  
    tigervnc-server-module-1.8.0-24.amzn2.0.2.i686  
    tigervnc-debuginfo-1.8.0-24.amzn2.0.2.i686  
  
noarch:  
    tigervnc-server-applet-1.8.0-24.amzn2.0.2.noarch  
    tigervnc-license-1.8.0-24.amzn2.0.2.noarch  
    tigervnc-icons-1.8.0-24.amzn2.0.2.noarch  
  
src:  
    tigervnc-1.8.0-24.amzn2.0.2.src  
  
x86_64:  
    tigervnc-1.8.0-24.amzn2.0.2.x86_64  
    tigervnc-server-1.8.0-24.amzn2.0.2.x86_64  
    tigervnc-server-minimal-1.8.0-24.amzn2.0.2.x86_64  
    tigervnc-server-module-1.8.0-24.amzn2.0.2.x86_64  
    tigervnc-debuginfo-1.8.0-24.amzn2.0.2.x86_64  

Additional References

Red Hat: CVE-2023-0494

Mitre: CVE-2023-0494