Security Information / 2022 / Security Information -- DSA-5251-1 isc-dhcp

Debian Security Advisory

DSA-5251-1 isc-dhcp -- security update

Date Reported:

06 Oct 2022

Affected Packages:

isc-dhcp

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 1021320.
In Mitre's CVE dictionary: CVE-2022-2928, CVE-2022-2929.

More information:

Several vulnerabilities have been discovered in the ISC DHCP client, relay and server.

• CVE-2022-2928

  It was discovered that the DHCP server does not correctly perform option reference counting when configured with "allow leasequery;". A remote attacker can take advantage of this flaw to cause a denial of service (daemon crash).

• CVE-2022-2929

  It was discovered that the DHCP server is prone to a memory leak flaw when handling contents of option 81 (fqdn) data received in a DHCP packet. A remote attacker can take advantage of this flaw to cause DHCP servers to consume resources, resulting in denial of service.

For the stable distribution (bullseye), these problems have been fixed in version 4.4.1-2.3+deb11u1.

We recommend that you upgrade your isc-dhcp packages.

For the detailed security status of isc-dhcp please refer to its security tracker page at: https://security-tracker.debian.org/tracker/isc-dhcp