USN-6633-1: Bind vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled parsing large DNS messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. (CVE-2023-4408) Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Bind icorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. (CVE-2023-50387) It was discovered that Bind incorrectly handled preparing an NSEC3 closest encloser proof. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. (CVE-2023-50868) It was discovered that Bind incorrectly handled reverse zone queries when nxdomain-redirect is enabled. A remote attacker could possibly use this issue to cause Bind to crash, leading to a denial of service. (CVE-2023-5517) It was discovered that Bind incorrectly handled recursive resolution when both DNS64 and serve-stable were enabled. A remote attacker could possibly use this issue to cause Bind to crash, leading to a denial of service. (CVE-2023-5679) Update Instructions: Run `sudo pro fix USN-6633-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: dnsutils – 1:9.18.18-0ubuntu0.22.04.2 bind9-libs – 1:9.18.18-0ubuntu0.22.04.2 bind9utils – 1:9.18.18-0ubuntu0.22.04.2 bind9-dev – 1:9.18.18-0ubuntu0.22.04.2 bind9-doc – 1:9.18.18-0ubuntu0.22.04.2 bind9-utils – 1:9.18.18-0ubuntu0.22.04.2 bind9 – 1:9.18.18-0ubuntu0.22.04.2 bind9-dnsutils – 1:9.18.18-0ubuntu0.22.04.2 bind9-host – 1:9.18.18-0ubuntu0.22.04.2 No subscription required

CVEs contained in this USN include: CVE-2023-4408, CVE-2023-50387, CVE-2023-50868, CVE-2023-5517, CVE-2023-5679.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs4
  • All versions prior to 1.72.0
• Jammy Stemcells
  • 1.x versions prior to 1.379
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.379

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 1.72.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.379 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • For all versions, upgrade Jammy Stemcells to 1.379 or greater

History

2024-02-29: Initial vulnerability report published.