CVE-2013-2494: ISC Dhcp

Medium severity, CVSS 4.9. EPSS: 1.2% chance of exploitation in the next 30 days.

libdns in ISC DHCP 4.2.x before 4.2.5-P1 allows remote name servers to cause a denial of service (memory consumption) via vectors involving a regular expression, as demonstrated by a memory-exhaustion attack against a machine running a dhcpd process, a related issue to CVE-2013-2266.

Affected products

• ISC Dhcp: 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; version 4.2.5 only

Published 2013-03-28. Last modified 2026-06-16.