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A local privilege escalation vulnerability has been reported to affect the 2.6 Linux kernel.
The issue appears to exist due to a lack of sufficient sanity checks performed when executing a file that is hosted on a remote Samba share. An attacker may exploit this condition to gain elevated privileges, as the setuid/setgid bit of a remote file is honored on the local system.
The following example has been supplied:
"share" - smb server
"slovakia" - smb client
misko@slovakia:~$ smbmount --version
Usage: mount.smbfs service mountpoint [-n] [-o options,...]
Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: email@example.com <mailto:firstname.lastname@example.org>.
The above is excepted from www.securityfocus.com. Follow the link at the top of this post for the full information (including credits, etc).