Debian 10: DSA-5251-1 Moderate: isc-dhcp DoS, Resource Leak Issues

debian

October 6, 2022

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

Topics Covered

security advisory moderate denial of service debian resource leak

Summary

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/source-package/isc-dhcp

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