Debian Security Advisory

DLA-2674-1 isc-dhcp -- LTS security update

Date Reported:
03 Jun 2021
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 989157.
In Mitre's CVE dictionary: CVE-2021-25217.
More information:

Jon Franklin and Pawel Wieczorkiewicz found an issue in the ISC DHCP client and server when parsing lease information, which could lead to denial of service via application crash.

For Debian 9 stretch, this problem has been fixed in version 4.3.5-3+deb9u2.

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:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: