According to Symantec’s DeepSight Threat Analyst Team, Samba version 3.0.10 that ships with Mac OS X is open to a buffer overflow vulnerability. This issue affects all versions of Samba prior to version 3.0.25, and it is available for download from here.
Symantec indicates that Apple has updated Samba as part of its Security Update 2005-003.
Samba is a free and open source software suite that provides printing and file access services to SMB / CIFS clients. The technology enables interoperability between Linux / Unix servers and Windows-based clients.
Symante recommends that all Mac users who need to share files with Windows update their Macs to the latest version of Samba, and disable Samba completely if this is not possible.