USN-5626-1: Bind vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

Yehuda Afek, Anat Bremler-Barr, and Shani Stajnrod discovered that Bind incorrectly handled large delegations. A remote attacker could possibly use this issue to reduce performance, leading to a denial of service. (CVE-2022-2795) It was discovered that Bind incorrectly handled statistics requests. A remote attacker could possibly use this issue to obtain sensitive memory contents, or cause a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-2881) It was discovered that Bind incorrectly handled memory when processing certain Diffie-Hellman key exchanges. A remote attacker could use this issue to consume resources, leading to a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-2906) Maksym Odinintsev discovered that Bind incorrectly handled answers from cache when configured with a zero stale-answer-timeout. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-3080) It was discovered that Bind incorrectly handled memory when processing ECDSA DNSSEC verification. A remote attacker could use this issue to consume resources, leading to a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2022-38177) It was discovered that Bind incorrectly handled memory when processing EDDSA DNSSEC verification. A remote attacker could use this issue to consume resources, leading to a denial of service. (CVE-2022-38178) Update Instructions: Run `sudo ua fix USN-5626-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: dnsutils – 1:9.11.3+dfsg-1ubuntu1.18 libbind-dev – 1:9.11.3+dfsg-1ubuntu1.18 libirs-export160 – 1:9.11.3+dfsg-1ubuntu1.18 bind9utils – 1:9.11.3+dfsg-1ubuntu1.18 libbind9-160 – 1:9.11.3+dfsg-1ubuntu1.18 libisccc160 – 1:9.11.3+dfsg-1ubuntu1.18 libisc-export169 – 1:9.11.3+dfsg-1ubuntu1.18 libisccfg160 – 1:9.11.3+dfsg-1ubuntu1.18 bind9-doc – 1:9.11.3+dfsg-1ubuntu1.18 libbind-export-dev – 1:9.11.3+dfsg-1ubuntu1.18 libisc169 – 1:9.11.3+dfsg-1ubuntu1.18 libirs160 – 1:9.11.3+dfsg-1ubuntu1.18 libdns-export1100 – 1:9.11.3+dfsg-1ubuntu1.18 libisccc-export160 – 1:9.11.3+dfsg-1ubuntu1.18 libisccfg-export160 – 1:9.11.3+dfsg-1ubuntu1.18 liblwres160 – 1:9.11.3+dfsg-1ubuntu1.18 libdns1100 – 1:9.11.3+dfsg-1ubuntu1.18 bind9 – 1:9.11.3+dfsg-1ubuntu1.18 bind9-host – 1:9.11.3+dfsg-1ubuntu1.18 No subscription required

CVEs contained in this USN include: CVE-2022-2795, CVE-2022-2881, CVE-2022-2906, CVE-2022-3080, CVE-2022-38177, CVE-2022-38178.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.115
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.326.0
• CF Deployment
  • All versions prior to 21.11.0, or later versions with Bionic Stemcells prior to 1.115

Mitigation

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

• Bionic Stemcells
  • Upgrade 1.x versions to 1.115 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.326.0 or greater
• CF Deployment
  • Upgrade all versions to 21.11.0 or greater and upgrade Bionic Stemcells to 1.115 or greater

History

2022-10-28: Initial vulnerability report published.