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2003: 2,700 advisories published
2004: 3,100 advisories published
2005: 4,600 advisories published
2006: 5,300 advisories published

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TITLE:
Samba Multiple Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA27450

VERIFY ADVISORY:
http://secunia.com/advisories/27450/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From local network

SOFTWARE:
Samba 3.x
http://secunia.com/product/2999/
Samba 2.x
http://secunia.com/product/1271/

DESCRIPTION:
Some vulnerabilities have been reported in Samba, which can be
exploited by malicious people to compromise a vulnerable system.

1) A boundary error exists within the "reply_netbios_packet()"
function in nmbd/nmbd_packets.c when sending NetBIOS replies. This
can be exploited to cause a stack-based buffer overflow by sending
multiple specially crafted WINS "Name Registration" requests followed
by a WINS "Name Query" request.

Successful exploitation allows execution of arbitrary code, but
requires that Samba is configured to run as a WINS server (the "wins
support" option is enabled).

2) A boundary error exists within the processing of GETDC logon
requests. This can be exploited to cause a buffer overflow by sending
specially crafted GETDC mailslot requests.

Successful exploitation of the vulnerability requires that Samba is
configured as a Primary or Backup Domain Controller.

The vulnerabilities are reported in version 3.0.26a. Other versions
may also be affected.

SOLUTION:
Apply patches or update to version 3.0.27.

Patches for version 3.0.26a:
http://us1.samba.org/samba/ftp/patches/security/samba-3.0.26a-CVE-2007-5398.patch
http://us1.samba.org/samba/ftp/patches/security/samba-3.0.26a-CVE-2007-4572.patch

PROVIDED AND/OR DISCOVERED BY:
1) Alin Rad Pop, Secunia Research.
2) Reported by the vendor.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2007-90/

Samba:
http://us1.samba.org/samba/history/security.html

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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