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AUSCERT External Security Bulletin Redistribution
Remote code execution in nmbd
4 August 2014
AusCERT Security Bulletin Summary
Publisher: The Samba Team
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Root Compromise -- Remote/Unauthenticated
CVE Names: CVE-2014-3560
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== Subject: Remote code execution in nmbd
== CVE ID#: CVE-2014-3560
== Versions: Samba 4.0.0 to 4.1.10
== Summary: Samba 4.0.0 to 4.1.10 are affected by a
== remote code execution attack on
== unauthenticated nmbd NetBIOS name services.
All current versions of Samba 4.x.x are vulnerable to a remote code
execution vulnerability in the nmbd NetBIOS name services daemon.
A malicious browser 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
A patch addressing this defect has been posted to
Additionally, Samba 4.1.11 and 4.0.21 have been issued as security
releases to correct the defect. Patches against older Samba versions
are available at http://samba.org/samba/patches/. Samba vendors and
administrators running affected versions are advised to upgrade or
apply the patch as soon as possible.
Do not run nmbd, the NetBIOS name services daemon.
This problem was found and the fix provided by Volker Lendecke, a
Samba Team member working for SerNet <firstname.lastname@example.org>
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