FreeBSD : samba -- potential leakage of arbitrary memory contents (1583640d-be20-11dd-a578-0030843d3802)

This script is Copyright (C) 2008-2013 Tenable Network Security, Inc.

Synopsis :

The remote FreeBSD host is missing one or more security-related

Description :

Samba Team reports :

Samba 3.0.29 and beyond contain a change to deal with gcc 4
optimizations. Part of the change modified range checking for
client-generated offsets of secondary trans, trans2 and nttrans
requests. These requests are used to transfer arbitrary amounts of
memory from clients to servers and back using small SMB requests and
contain two offsets: One offset (A) pointing into the PDU sent by the
client and one (B) to direct the transferred contents into the buffer
built on the server side. While the range checking for offset (B) is
correct, a cut and paste error lets offset (A) pass completely
unchecked against overflow.

The buffers passed into trans, trans2 and nttrans undergo higher-level
processing like DCE/RPC requests or listing directories. The missing
bounds check means that a malicious client can make the server do this
higher-level processing on arbitrary memory contents of the smbd
process handling the request. It is unknown if that can be abused to
pass arbitrary memory contents back to the client, but an important
barrier is missing from the affected Samba versions.

See also :

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 8.5

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 34976 (freebsd_pkg_1583640dbe2011dda5780030843d3802.nasl)

Bugtraq ID:

CVE ID: CVE-2008-4314

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