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USN-6168-1: libx11 vulnerability

Severity

Medium

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 22.04

Description

Gregory James Duck discovered that libx11 incorrectly handled certain Request, Event, or Error IDs. If a user were tricked into connecting to a malicious X Server, a remote attacker could possibly use this issue to cause libx11 to crash, resulting in a denial of service. Update Instructions: Run `sudo pro fix USN-6168-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libx11-6 - 2:1.6.9-2ubuntu1.5 libx11-data - 2:1.6.9-2ubuntu1.5 libx11-xcb-dev - 2:1.6.9-2ubuntu1.5 libx11-xcb1 - 2:1.6.9-2ubuntu1.5 libx11-doc - 2:1.6.9-2ubuntu1.5 libx11-dev - 2:1.6.9-2ubuntu1.5 No subscription required

CVEs contained in this USN include: CVE-2023-3138

Affected VMware Products and Versions

Severity is medium unless otherwise noted.

• Isolation Segment
  • 3.0.x versions prior to 3.0.14
  • 4.0.x versions prior to 4.0.5

• VMware Tanzu Application Service for VMs
  • 3.0.x versions prior to 3.0.14
  • 4.0.x versions prior to 4.0.5

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. On the Tanzu Network product page for each release, check the Depends On section and/or Release Notes for this information. Releases that have fixed this issue include:

• Isolation Segment
  • 3.0.14
  • 4.0.5

• VMware Tanzu Application Service for VMs
  • 3.0.14
  • 4.0.5

References

• https://ubuntu.com/security/CVE-2023-3138
• https://ubuntu.com/security/notices/USN-6168-1
• https://cloudfoundry.org/blog/usn-6168-1

History

2023-08-02: Initial vulnerability report published.