‫ Samba patch fixes critical vulnerability

Number: IRCNE2014082278
Date: 2014-08-04

According to “zdnet”, the latest in a recent series of updates to the Samba file system software fixes a critical vulnerability that could allow an attacker on the local network to take control of a host running a vulnerable version of the Samba nmbd NetBIOS name services daemon.

Samba is an open source implementation of the SMB/CIFS network file sharing protocol. SMB/CIFS is most famous as the protocol used in file sharing over Microsoft Windows networks, and Samba exists largely for non-Windows interoperability with those networks. nmbd is a server component of it which responds to NetBIOS requests over IP networks.

In order to exploit the vulnerability, a malicious system on the network (a "browser" in CIFS terminology) "...can send packets that may overwrite the heap of the target nmbd NetBIOS name services daemon. It may be possible to use this to generate a remote code execution vulnerability as the superuser (root)."

The new current versions of Samba are 4.1.11 and 4.0.21. There are also patches available for Samba versions 4.1.10 and 4.0.20. These versions themselves were just released in the last few days to address numerous non-security bugs.


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