[ GLSA 200712-10 ] Samba: Execution of arbitrary code

[GLSA]

Gentoo Linux Security Advisory

Title: Samba: Execution of arbitrary code (GLSA 200712-10)
Severity: high
Exploitable: remote
Date: December 10, 2007
Bug(s): #200773
ID: 200712-10

Synopsis


Samba contains a buffer overflow vulnerability potentially resulting in the
execution of arbitrary code.


Background


Samba is a suite of SMB and CIFS client/server programs for UNIX.


Affected Packages

Package: net-fs/samba
Vulnerable: < 3.0.28
Unaffected: >= 3.0.28
Architectures: All supported architectures


Description


Alin Rad Pop (Secunia Research) discovered a boundary checking error in
the send_mailslot() function which could lead to a stack-based buffer
overflow.


Impact


A remote attacker could send a specially crafted "SAMLOGON" domain
logon packet, possibly leading to the execution of arbitrary code with
elevated privileges. Note that this vulnerability is exploitable only
when domain logon support is enabled in Samba, which is not the case in
Gentoo's default configuration.


Workaround


Disable domain logon in Samba by setting " domain logons = no " in
the "global" section of your smb.conf and restart Samba.


Resolution


All Samba users should upgrade to the latest version: