GLSA-200407-21 : Samba: Multiple buffer overflows

This script is Copyright (C) 2004-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200407-21
(Samba: Multiple buffer overflows)

Evgeny Demidov found a buffer overflow in SWAT, located in the base64 data
decoder used to handle HTTP basic authentication (CAN-2004-0600). The same
flaw is present in the code used to handle the sambaMungedDial attribute
value, when using the ldapsam passdb backend. Another buffer overflow was
found in the code used to support the 'mangling method = hash' smb.conf
option (CAN-2004-0686). Note that the default Samba value for this option
is 'mangling method = hash2' which is not vulnerable.

Impact :

The SWAT authentication overflow could be exploited to execute arbitrary
code with the rights of the Samba daemon process. The overflow in the
sambaMungedDial handling code is not thought to be exploitable. The buffer
overflow in 'mangling method = hash' code could also be used to execute
arbitrary code on vulnerable configurations.

Workaround :

Users disabling SWAT, not using ldapsam passdb backends and not using the
'mangling method = hash' option are not vulnerable.

See also :

http://www.samba.org/samba/history/samba-3.0.5.html
http://www.gentoo.org/security/en/glsa/glsa-200407-21.xml

Solution :

All Samba users should upgrade to the latest version:
# emerge sync
# emerge -pv '>=net-fs/samba-3.0.5'
# emerge '>=net-fs/samba-3.0.5'

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 14554 (gentoo_GLSA-200407-21.nasl)

Bugtraq ID:

CVE ID: CVE-2004-0600
CVE-2004-0686