Samba smbmnt allows elevated privileges
| samba-smbmnt-gain-privileges (15131) |  High Risk |
Description:
Samba could allow a local attacker to gain elevated privileges on the system, caused by a vulnerability in the smbmnt binary configuration. The smbmnt binary is configured with set user id (setuid) root privileges. If a local attacker has access to a remote Samba server, the attacker can use smbmnt to mount the server to the attacker's computer. The attacker can then execute a setuid binary on the remote Samba server to gain elevated privileges, including root.
Platforms Affected:
- Debian, Debian Linux 3.0
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 9.1 PPC
- MandrakeSoft, Mandrake Linux 9.1
- MandrakeSoft, Mandrake Linux 9.2
- MandrakeSoft, Mandrake Linux 9.2 AMD64
- MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 2.1
- MandrakeSoft, Mandrake Multi Network Firewall 8.2
- Samba, Samba 2.0
- Samba, Samba 3.0.0
- Turbolinux, Turbolinux 10 Desktop
- Turbolinux, Turbolinux 10 F...
- Turbolinux, Turbolinux 7 Server
- Turbolinux, Turbolinux 7 Workstation
- Turbolinux, Turbolinux 8 Server
- Turbolinux, Turbolinux 8 Workstation
- Turbolinux, Turbolinux Appliance Server 1.0
- Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
Remedy:
For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest samba package (2.2.3a-13 or later), as listed in DSA-463-1. See References.
For Mandrake Linux:
Upgrade to the latest samba package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:035 : samba for more information. See References.
Mandrake Linux 9.1: 2.2.7a-9.3.91mdk or later
Mandrake Linux 9.2: 2.2.8a-13.1.92mdk or later
Mandrake Linux Multi Network Firewall 8.2: 2.2.7a-9.3.M82mdk or later
Mandrake Linux Corporate Server 2.1: 2.2.7a-10.1.C21mdk or later
For Gentoo Linux:
Upgrade to the latest version of samba (3.0.2a-r2 or later), as listed in GLSA 200404-21. See References.
For Turbolinux:
Upgrade to the latest samba package, as listed below. Refer to Turbolinux Security Advisory TLSA-2004-25 for more information. See References.
Turbolinux Appliance Server 1.0 Hosting Edition and Turbolinux Appliance Server 1.0 Workgroup Edition: 2.2.7a-9jaJP or later
Turbolinux 10 Desktop: 2.2.7a-9jaJP or later
Turbolinux 8 Server and workstation, and 7 Server and workstation:2.2.7a-9jaJP or later
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Gain Access
References:
- BugTraq Mailing List, Mon Feb 09 2004 - 15:23:03 CST , Samba 3.x + kernel 2.6.x local root vulnerability at http://archives.neohapsis.com/archives/bugtraq/2004-02/0238.html.
- GLSA 200404-21, Multiple Vulnerabilities in Samba at http://www.linuxsecurity.com/content/view/105994/104/.
- BID-9619: Linux Kernel Samba Share Local Privilege Elevation Vulnerability
- CVE-2004-0186: smbmnt in Samba 2.x and 3.x on Linux 2.6, when installed setuid, allows local users to gain root privileges by mounting a Samba share that contains a setuid root program, whose setuid attributes are not cleared when the share is mounted.
- DSA-463: samba -- privilege escalation
- GLSA-200404-21: Multiple Vulnerabilities in Samba
- MDKSA-2004:035: Updated samba packages fix privilege escalation vulnerability
- OSVDB ID: 3916: Samba smbmnt Local Privilege Escalation
Reported:
Feb 10, 2004
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