USN-6407-1: libx11 vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

Gregory James Duck discovered that libx11 incorrectly handled certain keyboard symbols. If a user were tricked into connecting to a malicious X server, a remote attacker could use this issue to cause libx11 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-43785) Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could possibly use this issue to consume memory, leading to a denial of service. (CVE-2023-43786) Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could use this issue to cause libx11 to crash, leading to a denial of service, or possibly execute arbitrary code. (CVE-2023-43787) Update Instructions: Run `sudo pro fix USN-6407-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libx11-6 – 2:1.6.9-2ubuntu1.6 libx11-data – 2:1.6.9-2ubuntu1.6 libx11-xcb-dev – 2:1.6.9-2ubuntu1.6 libx11-xcb1 – 2:1.6.9-2ubuntu1.6 libx11-doc – 2:1.6.9-2ubuntu1.6 libx11-dev – 2:1.6.9-2ubuntu1.6 No subscription required

CVEs contained in this USN include: CVE-2023-43785, CVE-2023-43786, CVE-2023-43787.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs4
  • All versions prior to 1.40.0
• CF Deployment
  • All versions prior to 32.12.0

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below.

The Cloud Foundry project recommends upgrading the following releases:

• cflinuxfs4
  • Upgrade all versions to 1.40.0 or greater
• CF Deployment
  • Upgrade all versions to 32.12.0 or greater

History

2023-10-05: Initial vulnerability report published.