High Nessus Plugin ID 13818
SynopsisThe remote host is missing a vendor-supplied security patch
DescriptionThe remote host is missing the patch for the advisory SuSE-SA:2003:050 (rsync).
The rsync suite provides client and server tools to easily support an administrator keeping the files of different machines in sync.
In most private networks the rsync client tool is used via SSH to fulfill his tasks. In an open environment rsync is run in server mode accepting connections from many untrusted hosts with, but mostly without, authentication.
The rsync server drops its root privileges soon after it was started and per default creates a chroot environment.
Due to insufficient integer/bounds checking in the server code a heap overflow can be triggered remotely to execute arbitrary code. This code does not get executed as root and access is limited to the chroot environment. The chroot environment maybe broken afterwards by abusing further holes in system software or holes in the chroot setup.
Your are not vulnerable as long as you do not use rsync in server mode or you use authentication to access the rsync server.
As a temporary workaround you can disable access to your rsync server for untrusted parties, enable authentication or switch back to rsync via SSH.
Please download the update package for your distribution and verify its integrity by the methods listed in section 3) of this announcement.
Then, install the package using the command 'rpm -Fhv file.rpm' to apply the update.