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Ubuntu 14.10 USN-2484-1 Critical: Unbound Resource Consumption Risk

ubuntu
Calendar Grey January 26, 2015
Dist Ubuntu Esm H88
A vulnerability in Unbound has surfaced that may result in significant resource usage; prompt action is necessary to protect your infrastructure.
Unbound could be made to consume resources if it received specially crafted network traffic.

Summary

Unbound could be made to consume resources if it received specially crafted

network traffic.

Software Description:

- unbound: validating, recursive, caching DNS resolver

Details:

Florian Maury discovered that Unbound incorrectly handled delegation. A

remote attacker could possibly use this issue to cause Unbound to consume

resources, resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu resource consumption Unbound

Update Instructions

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

Ubuntu 14.10:
  libunbound2                     1.4.22-1ubuntu4.14.10.1
  unbound                         1.4.22-1ubuntu4.14.10.1

Ubuntu 14.04 LTS:
  libunbound2                     1.4.22-1ubuntu4.14.04.1
  unbound                         1.4.22-1ubuntu4.14.04.1

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

References

https://ubuntu.com/security/notices/USN-2484-1

CVE-2014-8602

Severity
critical
Lowest
Low
Medium
High
Critical

January 26, 2015

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu resource consumption Unbound

Package Information

https://launchpad.net/ubuntu/+source/unbound/1.4.22-1ubuntu4.14.10.1
https://launchpad.net/ubuntu/+source/unbound/1.4.22-1ubuntu4.14.04.1

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