CVE-2012-3571: Canonical Ubuntu Linux

Medium severity, CVSS 6.1. EPSS: 13% chance of exploitation in the next 30 days.

ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier.

Affected products

• Canonical Ubuntu Linux: version 11.04 only; version 11.10 only; version 12.04 only
• Debian Debian Linux: version 6.0 only; version 7.0 only
• ISC Dhcp: version 4.1.2 only; version 4.2.0 only; version 4.2.1 only; version 4.2.2 only; version 4.2.3 only; version 4.2.4 only; …

Published 2012-07-25. Last modified 2026-06-16.