The OpenPKG Project Information for VU#958321

Samba contains a remotely exploitable stack buffer overflow

Status

Affected

Vendor Statement

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________________________________________________________________________

OpenPKG Security Advisory                            The OpenPKG Project
http://www.openpkg.org/security.html              http://www.openpkg.org
openpkg-security@openpkg.org                         openpkg@openpkg.org
OpenPKG-SA-2002.012                                          29-Nov-2002
________________________________________________________________________

Package:             samba
Vulnerability:       code execution, root exploit
OpenPKG Specific:    no

Dependent Packages:  none

Affected Releases:   Affected Packages:       Corrected Packages:
OpenPKG 1.0          <= samba-2.2.2-1.0.0     >= samba-2.2.2-1.0.1
OpenPKG 1.1          <= samba-2.2.5-1.1.0     >= samba-2.2.5-1.1.1
OpenPKG CURRENT      <= samba-2.2.6-20021017  >= samba-2.2.7-20021120

Description:
 A vulnerability in Samba [0] versions 2.2.2 through 2.2.6 was
 discovered by the Debian Samba maintainers [1]. A bug in the
 length checking for encrypted password change requests from clients
 could be exploited using a buffer overrun attack on the smbd(8)
 stack. This attack would have to be crafted in such a way that
 converting a DOS codepage string to little endian UCS2 unicode
 would translate into an executable block of code.

  Check whether you are affected by running "<prefix>/bin/rpm -q
 samba". If you have an affected version of the samba package (see
 above), please upgrade it according to the solution below.

Solution:
 Update existing packages to newly patched versions of Samba. Select the
 updated source RPM appropriate for your OpenPKG release [2][3][4], and
 fetch it from the OpenPKG FTP service or a mirror location. Verify its
 integrity [5], build a corresponding binary RPM from it and update your
 OpenPKG installation by applying the binary RPM [6]. For the latest
 OpenPKG 1.1 release, perform the following operations to permanently fix
 the security problem (for other releases adjust accordingly).

  $ ftp ftp.openpkg.org
 ftp> bin
 ftp> cd release/1.1/UPD
 ftp> get samba-2.2.5-1.1.1.src.rpm
 ftp> bye
 $ <prefix>/bin/rpm -v --checksig samba-2.2.5-1.1.1.src.rpm
 $ <prefix>/bin/rpm --rebuild samba-2.2.5-1.1.1.src.rpm
 $ su -
 # <prefix>/bin/rpm -Fvh <prefix>/RPM/PKG/samba-2.2.5-1.1.1.*.rpm
 # <prefix>/etc/rc samba stop start
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References:
 [0]
http://www.samba.org/
 [1]
http://www.debian.org/security/2002/dsa-200
 [2]
ftp://ftp.openpkg.org/release/1.0/UPD/
 [3]
ftp://ftp.openpkg.org/release/1.1/UPD/
 [4]
ftp://ftp.openpkg.org/current/SRC/
 [5]
http://www.openpkg.org/security.html#signature
 [6]
http://www.openpkg.org/tutorial.html#regular-source
________________________________________________________________________

For security reasons, this advisory was digitally signed with
the OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F)
of the OpenPKG project which you can find under the official URL
http://www.openpkg.org/openpkg.pgp or on http://keyserver.pgp.com/. To
check the integrity of this advisory, verify its digital signature by
using GnuPG (
http://www.gnupg.org/). For example, pipe this message to
the command "gpg --verify --keyserver keyserver.pgp.com".
________________________________________________________________________

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Comment: OpenPKG <openpkg@openpkg.org>

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

The CERT/CC has no additional comments at this time.

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