Ubuntu: 2171-1: rsync vulnerability
Posted by Benjamin D. Thomas   
Ubuntu rsync could be made to consume resources if it received specially craftednetwork traffic.
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Ubuntu Security Notice USN-2171-1
April 23, 2014

rsync vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

rsync could be made to consume resources if it received specially crafted
network traffic.

Software Description:
- rsync: fast, versatile, remote (and local) file-copying tool

Details:

Ryan Finnie discovered that the rsync daemon incorrectly handled invalid
usernames. A remote attacker could use this issue to cause rsync to consume
resources, resulting in a denial of service.

Update instructions:

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

Ubuntu 14.04 LTS:
  rsync                           3.1.0-2ubuntu0.1

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

References:
  http://www.ubuntu.com/usn/usn-2171-1
  CVE-2014-2855

Package Information:
  https://launchpad.net/ubuntu/+source/rsync/3.1.0-2ubuntu0.1