USN-5658-1: DHCP vulnerabilities | Cloud Foundry

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 18.04
• Canonical Ubuntu 22.04

Description

It was discovered that DHCP incorrectly handled option reference counting. A remote attacker could possibly use this issue to cause DHCP servers to crash, resulting in a denial of service. (CVE-2022-2928) It was discovered that DHCP incorrectly handled certain memory operations. A remote attacker could possibly use this issue to cause DHCP clients and servers to consume resources, leading to a denial of service. (CVE-2022-2929) Update Instructions: Run sudo pro fix USN-5658-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: isc-dhcp-relay – 4.3.5-3ubuntu7.4 isc-dhcp-client-ddns – 4.3.5-3ubuntu7.4 isc-dhcp-dev – 4.3.5-3ubuntu7.4 isc-dhcp-client – 4.3.5-3ubuntu7.4 isc-dhcp-common – 4.3.5-3ubuntu7.4 isc-dhcp-server – 4.3.5-3ubuntu7.4 isc-dhcp-server-ldap – 4.3.5-3ubuntu7.4 No subscription required

CVEs contained in this USN include: CVE-2022-2928, CVE-2022-2929.

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 0.327.0
• Jammy Stemcells
  • 1.x versions prior to 1.30
  • All other stemcells not listed.
• CF Deployment
  • All versions prior to 22.0.0, or later versions with Jammy Stemcells prior to 1.30 or 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 0.327.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.30 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • Upgrade all versions to 22.0.0 or greater, upgrade Jammy Stemcells to 1.30 or greater, and upgrade Bionic Stemcells to 1.115 or greater

References

• USN Notice
• CVE-2022-2928
• CVE-2022-2929

History

2022-12-07: Initial vulnerability report published.