On the website http://samba.sernet.de/linux-lan/ I found the following info about an exploit A smbmount root exploit has been posted to bugtraq. Apply this patch to your smbmount.c, and recompile is your smbfs utilities. smbfs-2.0.2 has this patch applied. The version of smbfs in the Red Hat 5.2 dist is 2.0.1-4. There is no update for smbfs in the errata list at www.redhat.com/errata. Could you verify the truth of this (I have not run the exploit myself) and release an update if appropriate. Sources can be found at the above web site, although I have no idea how authoritative they are.
AFAIK, by default smbfs RPM installs smbmount without suid bit set, so it should not be possible to exploit it.
What he said. smbmount isn't installed suid root, so the bug isn't exploitable on Red Hat.
sugar-toolkit-0.84.5-1.fc11 has been submitted as an update for Fedora 11. http://admin.fedoraproject.org/updates/sugar-toolkit-0.84.5-1.fc11
sugar-toolkit-0.84.5-1.fc11 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.