1. Ubuntu Security Notices
  2. USN-1519-1

USN-1519-1: DHCP vulnerabilities

Publication date

26 July 2012

Overview

DHCP could be made to crash if it received specially crafted network traffic.

Releases

Packages

Details

Markus Hietava discovered that the DHCP server incorrectly handled certain
malformed client identifiers. A remote attacker could use this issue to
cause DHCP to crash, resulting in a denial of service. (CVE-2012-3571)

Glen Eustace discovered that the DHCP server incorrectly handled memory. A
remote attacker could use this issue to cause DHCP to crash, resulting in a
denial of service. (CVE-2012-3954)

Markus Hietava discovered that the DHCP server incorrectly handled certain
malformed client identifiers. A remote attacker could use this issue to
cause DHCP to crash, resulting in a denial of service. (CVE-2012-3571)

Glen Eustace discovered that the DHCP server incorrectly handled memory. A
remote attacker could use this issue to cause DHCP to crash, resulting in a
denial of service. (CVE-2012-3954)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
12.04 precise isc-dhcp-server –  4.1.ESV-R4-0ubuntu5.2
11.10 oneiric isc-dhcp-server –  4.1.1-P1-17ubuntu10.3
11.04 natty isc-dhcp-server –  4.1.1-P1-15ubuntu9.4

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›