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Vulnerability Assessment & Network Security Forums |
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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery. Home >> Browse Vulnerability Assessment Database >> Mandrake Local Security Checks >> MDKSA-2003:032: samba Vulnerability Assessment Details
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MDKSA-2003:032: samba |
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Check for the version of the samba package Detailed Explanation for this Vulnerability Assessment The remote host is missing the patch for the advisory MDKSA-2003:032 (samba). The SuSE security team, during an audit of the Samba source code, found a flaw in the main smbd code which could permit 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 permit' and 'hosts deny' options in the smb.conf file can be used to permit access to your Samba server by only selected hosts for example: hosts permit = 127.0.0.1 192.168.2.0/24 192.168.3.0/24 hosts deny = 0.0.0.0/0 This will dispermit 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. Solution : http://wwwnew.mandriva.com/security/advisories?name=MDKSA-2003:032 Network Security Threat Level: High Networks Security ID: Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security |
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