Samba LSA RPC "take ownership" Privilege Security Bypass Security Issue

SA48976

CVE-2012-2111

01 May 2012

Less Critical

Vendor Patch

Samba 3.x

From local network

Security Bypass

This covers vulnerabilities or security issues where malicious users or people can bypass certain security mechanisms of the application.

The actual impact varies significantly depending on the design and purpose of the affected application.

A security issue has been reported in Samba, which can be exploited by malicious users to bypass certain security restrictions.

The security issue is caused due to improper application of security checks in the CreateAccount, OpenAccount, AddAccountRights, and RemoveAccountRights remote procedure calls (RPC) within the Local Security Authoriy (LSA). This can be exploited to gain "take ownership" privileges and e.g. change the ownership of arbitrary files and directories on the smdb file server.

The security issue is reported in versions 3.4.x through 3.6.4.

Apply patch or update to version 3.4.17, 3.5.15, and 3.6.5.
http://www.samba.org/samba/patches/

The vendor credits Ivano Cristofolini.

http://www.samba.org/samba/security/CVE-2012-2111