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Ubuntu 12.04 LTS: 1519-1 Moderate: isc-dhcp Denial Of Service

ubuntu
Calendar Grey July 26, 2012
Scroller Ubuntu
Service interruptions caused by isc-dhcp security flaws affecting various Ubuntu releases. Immediate patches are required.
DHCP could be made to crash if it received specially crafted network traffic.

Summary

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

traffic.

Software Description:

- isc-dhcp: DHCP server and client

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)

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu service disruption isc-dhcp

Update Instructions

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

Ubuntu 12.04 LTS:
  isc-dhcp-server                 4.1.ESV-R4-0ubuntu5.2

Ubuntu 11.10:
  isc-dhcp-server                 4.1.1-P1-17ubuntu10.3

Ubuntu 11.04:
  isc-dhcp-server                 4.1.1-P1-15ubuntu9.4

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

References

https://ubuntu.com/security/notices/USN-1519-1

CVE-2012-3571, CVE-2012-3954

Severity
important
Lowest
Low
Medium
High
Critical

July 26, 2012

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu service disruption isc-dhcp

Package Information

https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.ESV-R4-0ubuntu5.2
https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.1-P1-17ubuntu10.3
https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.1-P1-15ubuntu9.4

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