-----BEGIN PGP SIGNED MESSAGE----- Samba 2.0.5 has just been released. This fixes a number of bugs, including 3 security holes. The security holes were discovered by Olaf Kirch (okirat_private) who performed a security audit on Samba for Caldera. The security holes were: 1) a denial of service attack on nmbd (the netbios name service daemon). The attack made nmbd spin using up CPU resources until it was killed. 2) A buffer overflow in the message service in smbd. This was exploitable if the system administrator had set the "message command" option in smb.conf. This option is not set by default. 3) A race condition in smbmnt which would allow a user to mount at arbitrary points in the filesystem. This could only be exploited if smbmnt is setuid, which it is not by default. While no instances of these holes being exploited are known, it would not be wise to just ignore these issues. A motivated attacker could almost certainly produce an exploit very quickly. New release - ----------- The Samba 2.0.5 release fixes these and other bugs. See http://www.samba.org/ for the release notes and download. The Samba 2.0.5 release has the following MD5 checksum 9fa63ff151ae697648020df37464eca9 b samba-2.0.5.tar.gz Workarounds - ----------- If you cannot upgrade to version 2.0.5 then we recommend the following action as temporary workarounds: 1) remove the "message command" option from smb.conf if you have set it. 2) remove the setuid bit from smbmnt if it is set (use "chmod u-s smbmnt") 3) if nmbd starts using large amounts of CPU then kill and restart it. Credits - ------- Thanks to Olaf Kirch and Caldera for their thorough security audit and help in producing a suitable fix. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv iQCVAwUBN5UxPWNSlURsK/StAQFWtQQAmGC1XjOdsqgLIHMZwPKvwk/dNP8biUlC 1p7PN9cw+oTWeQMtjN9xX+UAAKK7wKzCL+hZiFigYWVGIWItC6oVJbGVqIqa2Ik1 ThDi3oZ5411x1Hkadb+Ox9Xz8ZAmKw3euN6mnD1MbmMiZnnndnxTl9cneqWBkwS5 fJp12Qf2fCc= =O11u -----END PGP SIGNATURE-----
This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 14:52:52 PDT