The Red Hat security team has released an advisory on a Samba vulnerability effecting Samba version 3.5.0 through 4.2.0rc4. "It can be exploited by a malicious Samba client, by sending specially-crafted packets to the Samba server. No authentication is required to exploit this flaw. It can result in remotely controlled execution of arbitrary code as root." 
A patch  has been released by the Samba team to address the vulnerability.
Chris Mohan --- Internet Storm Center Handler on Duty
Feb 26th 2015
4 years ago