CVE-2013-2494 Denial of service in n/a

Medium 4.9 Published 28 Mar 2013 Updated 16 Sep 2024

Remote attackers can cause denial of service in ISC DHCP via memory exhaustion using crafted regular expressions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2013-2494?

CVE-2013-2494 is a medium-severity denial of service vulnerability in n/a, published on 28 Mar 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-119

Which versions are affected by CVE-2013-2494?

It affects 1 product.

Products include Isc Dhcp.

How do I fix CVE-2013-2494?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2013-2494 being exploited?

There is no known exploitation of CVE-2013-2494 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2013-2494, GHSA-f5jm-37c8-vx73.