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Ubuntu Security Notice USN-1434-1

Ubuntu Security Notice USN-1434-1
Posted May 1, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1434-1 - Ivano Cristofolini discovered that Samba incorrectly handled some Local Security Authority (LSA) remote procedure calls (RPC). A remote, authenticated attacker could exploit this to grant administrative privileges to arbitrary users. The administrative privileges could be used to bypass permission checks performed by the Samba server.

tags | advisory, remote, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2012-2111
MD5 | 38b127c8c765b97608e2d50fd59c5741

Ubuntu Security Notice USN-1434-1

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Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-1434-1
May 01, 2012

samba vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

Samba could allow a user to gain administrative privileges to the Samba server.

Software Description:
- samba: SMB/CIFS file, print, and login server for Unix

Details:

Ivano Cristofolini discovered that Samba incorrectly handled some Local
Security Authority (LSA) remote procedure calls (RPC). A remote, authenticated
attacker could exploit this to grant administrative privileges to arbitrary
users. The administrative privileges could be used to bypass permission checks
performed by the Samba server.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
samba 2:3.6.3-2ubuntu2.1

Ubuntu 11.10:
samba 2:3.5.11~dfsg-1ubuntu2.3

Ubuntu 11.04:
samba 2:3.5.8~dfsg-1ubuntu2.5

Ubuntu 10.04 LTS:
samba 2:3.4.7~dfsg-1ubuntu3.10

After a standard system update you may need to review the privileges of Samba
user accounts.

References:
http://www.ubuntu.com/usn/usn-1434-1
CVE-2012-2111

Package Information:
https://launchpad.net/ubuntu/+source/samba/2:3.6.3-2ubuntu2.1
https://launchpad.net/ubuntu/+source/samba/2:3.5.11~dfsg-1ubuntu2.3
https://launchpad.net/ubuntu/+source/samba/2:3.5.8~dfsg-1ubuntu2.5
https://launchpad.net/ubuntu/+source/samba/2:3.4.7~dfsg-1ubuntu3.10

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