USN-6407-2: libx11 vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

USN-6407-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original advisory details: 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-6407-2` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libx11-6 – 2:1.6.3-1ubuntu2.2+esm4 libx11-data – 2:1.6.3-1ubuntu2.2+esm4 libx11-xcb-dev – 2:1.6.3-1ubuntu2.2+esm4 libx11-xcb1 – 2:1.6.3-1ubuntu2.2+esm4 libx11-doc – 2:1.6.3-1ubuntu2.2+esm4 libx11-dev – 2:1.6.3-1ubuntu2.2+esm4 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

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.

• CF Deployment
  • All versions prior to 30.0.0

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

• CF Deployment
  • Upgrade all versions to 30.0.0 or greater

History

2023-11-09: Initial vulnerability report published.