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Mandrake: samba Buffer overflow vulnerability Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
Mandrake The SuSE security team, during an audit of the Samba source code, found a flaw in the main smbd code which could allow an external attacker to remotely and anonymously gain root privilege on a system running the Samba server.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

________________________________________________________________________

                Mandrake Linux Security Update Advisory
________________________________________________________________________

Package name:           samba
Advisory ID:            MDKSA-2003:032
Date:                   March 15th, 2003

Affected versions:	8.0, 8.1, 8.2, 9.0, Corporate Server 2.1,
			Multi Network Firewall 8.2
________________________________________________________________________

Problem Description:

 The SuSE security team, during an audit of the Samba source code, found
 a flaw in the main smbd code which could allow an external attacker to
 remotely and anonymously gain root privilege on a system running the
 Samba server.  This flaw exists in all version of Samba 2.x up to and
 including 2.2.7a.  The Samba team announced 2.2.8 today, however these
 updated packages include a patch that corrects this problem.
 
 MandrakeSoft urges all users to upgrade immediately.  If you are unable
 to apply the updated packages (perhaps due to unavailability on your
 preferred mirror), the following steps can be taken to protect an
 unpatched system:
 
 The "hosts allow" and "hosts deny" options in the smb.conf file can
 be used to allow access to your Samba server by only selected hosts; for
 example:
 
    hosts allow = 127.0.0.1 192.168.2.0/24 192.168.3.0/24
    hosts deny  = 0.0.0.0/0
 
 This will disallow all connections from machines that are not the 
 localhost or in the 192.168.2 and 192.168.3 private networks.
 Alternatively, you can tell Samba to listen to only specific network
 interfaces by using the "interfaces" and "bind interfaces only"
 options:
 
   interfaces = eth1 lo
   bind interfaces only = yes
 
 Obviously, use the internal interface for your network and not an
 external interface connected to the internet.  You may also choose to
 firewall off some UDP and TCP ports in addition to the previously
 mentioned suggestions by blocking external access to ports 137 and 138
 (UDP) and ports 139 and 445 (TCP).
 
 These steps should only be used as a temporary preventative measure
 and all users should upgrade as quickly as possible.
 
 Thanks to Sebastian Krahmer and the SuSE security team for performing
 the audit, Jeremy Allison for providing the fix, and Andrew Tridgell
 for providing advice on how to protect an unpatched Samba system.
________________________________________________________________________

References:
  
   http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0085
   http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0086
   http://www.samba.org/samba/whatsnew/samba-2.2.8.html
________________________________________________________________________

Updated Packages:
  
 Corporate Server 2.1:
 810bfc81419eda40ab94406b80e2fa78  corporate/2.1/RPMS/nss_wins-2.2.7a-8.1mdk.i586.rpm
 6ddcdba4b4ddc8de889a68408cf63e6e  corporate/2.1/RPMS/samba-client-2.2.7a-8.1mdk.i586.rpm
 dbbf8399e5d5b475e76b4ee4c8aa78ee  corporate/2.1/RPMS/samba-common-2.2.7a-8.1mdk.i586.rpm
 94ef44b5ce3a5aededddeb60485c90cd  corporate/2.1/RPMS/samba-doc-2.2.7a-8.1mdk.i586.rpm
 ca867675236e7df77aa4901f6f91f21e  corporate/2.1/RPMS/samba-server-2.2.7a-8.1mdk.i586.rpm
 3c9dbd347014301c6cc249979170bf19  corporate/2.1/RPMS/samba-swat-2.2.7a-8.1mdk.i586.rpm
 15b1406c67b55ecefb228cd40736d8fe  corporate/2.1/RPMS/samba-winbind-2.2.7a-8.1mdk.i586.rpm
 536160396aa14907f6195f42c480c0e3  corporate/2.1/SRPMS/samba-2.2.7a-8.1mdk.src.rpm

 Mandrake Linux 8.0:
 f705527a1ad9f511a8e61da4e2581bbf  8.0/RPMS/samba-client-2.2.7a-8.1mdk.i586.rpm
 2bb5172eb1e79908df14b6829ddfc8eb  8.0/RPMS/samba-common-2.2.7a-8.1mdk.i586.rpm
 3db651903659ecf5ca94be587a78057b  8.0/RPMS/samba-doc-2.2.7a-8.1mdk.i586.rpm
 aac48811be4dbb7663b31f75f10d56fa  8.0/RPMS/samba-server-2.2.7a-8.1mdk.i586.rpm
 8eca4b870ad649dd50635142ef3220e3  8.0/RPMS/samba-swat-2.2.7a-8.1mdk.i586.rpm
 536160396aa14907f6195f42c480c0e3  8.0/SRPMS/samba-2.2.7a-8.1mdk.src.rpm

 Mandrake Linux 8.0/PPC:
 c0619454ddd254a2864f41d1a15b3d31  ppc/8.0/RPMS/samba-client-2.2.7a-8.1mdk.ppc.rpm
 a98846ba4a83fa3953c1d910fe9ba650  ppc/8.0/RPMS/samba-common-2.2.7a-8.1mdk.ppc.rpm
 2f47b120f0947fa8458e250f214e3689  ppc/8.0/RPMS/samba-doc-2.2.7a-8.1mdk.ppc.rpm
 2a48acf9fc1db869a9c7dfac85953b1f  ppc/8.0/RPMS/samba-server-2.2.7a-8.1mdk.ppc.rpm
 35491c934f9bdd08b689b5c1b68e57fe  ppc/8.0/RPMS/samba-swat-2.2.7a-8.1mdk.ppc.rpm
 536160396aa14907f6195f42c480c0e3  ppc/8.0/SRPMS/samba-2.2.7a-8.1mdk.src.rpm

 Mandrake Linux 8.1:
 b8c035ddd18cd9da2682f3143e234b5a  8.1/RPMS/samba-client-2.2.7a-8.1mdk.i586.rpm
 f28d560e6c86e9315898351f7c528275  8.1/RPMS/samba-common-2.2.7a-8.1mdk.i586.rpm
 391bfea011d0bd10a91335754f135f6a  8.1/RPMS/samba-doc-2.2.7a-8.1mdk.i586.rpm
 1adccf598ff2488a65e3ac776056d6b8  8.1/RPMS/samba-server-2.2.7a-8.1mdk.i586.rpm
 8db945ae3a6f9f880ee9b2c76b4dd084  8.1/RPMS/samba-swat-2.2.7a-8.1mdk.i586.rpm
 536160396aa14907f6195f42c480c0e3  8.1/SRPMS/samba-2.2.7a-8.1mdk.src.rpm

 Mandrake Linux 8.1/IA64:
 c56ad7bbaab34e52592788c2d5ab26c2  ia64/8.1/RPMS/samba-client-2.2.7a-8.1mdk.ia64.rpm
 031bf8a6ce97a8dd24b50af5e925a457  ia64/8.1/RPMS/samba-common-2.2.7a-8.1mdk.ia64.rpm
 4e58c18e456d97c965d886381f7daa52  ia64/8.1/RPMS/samba-doc-2.2.7a-8.1mdk.ia64.rpm
 a1cce762d949e5946543fcdfd286fb3a  ia64/8.1/RPMS/samba-server-2.2.7a-8.1mdk.ia64.rpm
 129843f008dadb6081de6c23395a8a84  ia64/8.1/RPMS/samba-swat-2.2.7a-8.1mdk.ia64.rpm
 536160396aa14907f6195f42c480c0e3  ia64/8.1/SRPMS/samba-2.2.7a-8.1mdk.src.rpm

 Mandrake Linux 8.2:
 02f8d011f45ee9e58327e255ea83612d  8.2/RPMS/nss_wins-2.2.7a-8.1mdk.i586.rpm
 60cd9b4e2992f3165f1817556d3bac53  8.2/RPMS/samba-client-2.2.7a-8.1mdk.i586.rpm
 fc333e12163e12c36b04fc4859c55881  8.2/RPMS/samba-common-2.2.7a-8.1mdk.i586.rpm
 aee8b9fe6070528d6f336331438a0550  8.2/RPMS/samba-doc-2.2.7a-8.1mdk.i586.rpm
 8d826c7806adb99d8052025c286ae974  8.2/RPMS/samba-server-2.2.7a-8.1mdk.i586.rpm
 c53dad490cde79b748b1573962f92fce  8.2/RPMS/samba-swat-2.2.7a-8.1mdk.i586.rpm
 19e6759a7bcc7e75441f6dacdaaaac09  8.2/RPMS/samba-winbind-2.2.7a-8.1mdk.i586.rpm
 536160396aa14907f6195f42c480c0e3  8.2/SRPMS/samba-2.2.7a-8.1mdk.src.rpm

 Mandrake Linux 8.2/PPC:
 78d9e286b11af034707b39947601bc82  ppc/8.2/RPMS/nss_wins-2.2.7a-8.1mdk.ppc.rpm
 0fe779cadcecee5f4b5bf3a5a9e32144  ppc/8.2/RPMS/samba-client-2.2.7a-8.1mdk.ppc.rpm
 089e1ef95859b9959cbffe02f3c2bddc  ppc/8.2/RPMS/samba-common-2.2.7a-8.1mdk.ppc.rpm
 5fb312afc5d21ccf17ac6a46598a301e  ppc/8.2/RPMS/samba-doc-2.2.7a-8.1mdk.ppc.rpm
 786069f299f8b948971dfc546c4b4cb4  ppc/8.2/RPMS/samba-server-2.2.7a-8.1mdk.ppc.rpm
 fdc770fca7973d2a64bfce4cb2245b9b  ppc/8.2/RPMS/samba-swat-2.2.7a-8.1mdk.ppc.rpm
 6572712f90bcd13c4ca9358a59cb39ff  ppc/8.2/RPMS/samba-winbind-2.2.7a-8.1mdk.ppc.rpm
 536160396aa14907f6195f42c480c0e3  ppc/8.2/SRPMS/samba-2.2.7a-8.1mdk.src.rpm

 Mandrake Linux 9.0:
 810bfc81419eda40ab94406b80e2fa78  9.0/RPMS/nss_wins-2.2.7a-8.1mdk.i586.rpm
 6ddcdba4b4ddc8de889a68408cf63e6e  9.0/RPMS/samba-client-2.2.7a-8.1mdk.i586.rpm
 dbbf8399e5d5b475e76b4ee4c8aa78ee  9.0/RPMS/samba-common-2.2.7a-8.1mdk.i586.rpm
 94ef44b5ce3a5aededddeb60485c90cd  9.0/RPMS/samba-doc-2.2.7a-8.1mdk.i586.rpm
 ca867675236e7df77aa4901f6f91f21e  9.0/RPMS/samba-server-2.2.7a-8.1mdk.i586.rpm
 3c9dbd347014301c6cc249979170bf19  9.0/RPMS/samba-swat-2.2.7a-8.1mdk.i586.rpm
 15b1406c67b55ecefb228cd40736d8fe  9.0/RPMS/samba-winbind-2.2.7a-8.1mdk.i586.rpm
 536160396aa14907f6195f42c480c0e3  9.0/SRPMS/samba-2.2.7a-8.1mdk.src.rpm

 Multi Network Firewall 8.2:
 60cd9b4e2992f3165f1817556d3bac53  mnf8.2/RPMS/samba-client-2.2.7a-8.1mdk.i586.rpm
 fc333e12163e12c36b04fc4859c55881  mnf8.2/RPMS/samba-common-2.2.7a-8.1mdk.i586.rpm
 536160396aa14907f6195f42c480c0e3  mnf8.2/SRPMS/samba-2.2.7a-8.1mdk.src.rpm
________________________________________________________________________

Bug IDs fixed (see https://qa.mandrakesoft.com for more information):
________________________________________________________________________

To upgrade automatically, use MandrakeUpdate.  The verification of md5
checksums and GPG signatures is performed automatically for you.

If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".  A list of
FTP mirrors can be obtained from:

   http://www.mandrakesecure.net/en/ftp.php

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:

  rpm --checksig 

All packages are signed by MandrakeSoft for security.  You can obtain
the GPG public key of the Mandrake Linux Security Team from:

  https://www.mandrakesecure.net/RPM-GPG-KEYS

Please be aware that sometimes it takes the mirrors a few hours to
update.

You can view other update advisories for Mandrake Linux at:

   http://www.mandrakesecure.net/en/advisories/

MandrakeSoft has several security-related mailing list services that
anyone can subscribe to.  Information on these lists can be obtained by
visiting:

   http://www.mandrakesecure.net/en/mlist.php

If you want to report vulnerabilities, please contact

  security_linux-mandrake.com

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  

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