Samba: Execution of arbitrary code — GLSA 200712-10

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

Affected Packages

net-fs/samba on all architectures
Affected versions < 3.0.28
Unaffected versions >= 3.0.28

Background

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

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:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-fs/samba-3.0.28"

References

Release Date
December 10, 2007

Latest Revision
December 10, 2007: 01

Severity
high

Exploitable
remote

Bugzilla entries