Debian Long Term Support / LTS Security Information / 2018 / Security Information -- DLA-1313-1 isc-dhcp

Debian Security Advisory

DLA-1313-1 isc-dhcp -- LTS security update

Date Reported:

22 Mar 2018

Affected Packages:

isc-dhcp

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2018-5732, CVE-2018-5733.

More information:

Several vulnerabilities have been discovered in the ISC DHCP client, relay and server. The Common Vulnerabilities and Exposures project identifies the following issues:

• CVE-2018-5732

  Felix Wilhelm of the Google Security Team discovered that the DHCP client is prone to an out-of-bound memory access vulnerability when processing specially constructed DHCP options responses, resulting in potential execution of arbitrary code by a malicious DHCP server.

• CVE-2018-5733

  Felix Wilhelm of the Google Security Team discovered that the DHCP server does not properly handle reference counting when processing client requests. A malicious client can take advantage of this flaw to cause a denial of service (dhcpd crash) by sending large amounts of traffic.

For Debian 7 Wheezy, these problems have been fixed in version 4.2.2.dfsg.1-5+deb70u9.

We recommend that you upgrade your isc-dhcp packages.

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