Secunia Research reported a vulnerability that allows for the execution of arbitrary code in smbd. This defect is is a result of an incorrect buffer size when parsing SMB replies in the routine receive_smb_raw(). Samba versions 3.0.0 through 3.0.29 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/66765/samba-exec.txt
Source: https://packetstormsecurity.com/files/66765/samba-exec.txt.html