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______________________________________________________________________________

SUSE Security Announcement

Package: openssh
Announcement ID: SUSE-SA:2006:008
Date: Tue, 14 Feb 2006 11:00:00 +0000
Affected Products: SUSE LINUX 10.0
SUSE LINUX 9.3
SUSE LINUX 9.2
SUSE LINUX 9.1
SuSE Linux Desktop 1.0
SuSE Linux Enterprise Server 8
SUSE SLES 9
UnitedLinux 1.0
Vulnerability Type: remote code execution
Severity (1-10): 7
SUSE Default Package: yes
Cross-References: CVE-2006-0225

Content of This Advisory:
1) Security Vulnerability Resolved:
scp double expansion
Problem Description
2) Solution or Work-Around
3) Special Instructions and Notes
4) Package Location and Checksums
5) Pending Vulnerabilities, Solutions, and Work-Arounds:
See SUSE Security Summary Report.
6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

A problem in the handling of scp in openssh could be used to execute
commands on remote hosts even using a scp-only configuration.

This requires doing a remote-remote scp and a hostile server. (CVE-2006-0225)

On SUSE Linux Enterprise Server 9 the xauth pollution problem was fixed too.

The security fix changes the handling of quoting filenames which might
break automated scripts using this functionality.

Please check that your automated scp scripts still work after the
update.

2) Solution or Work-Around

There is no known workaround, please install the update packages.

3) Special Instructions and Notes

Please restart the sshd service after the update.

4) Package Location and Checksums

The preferred method for installing security updates is to use the YaST
Online Update (YOU) tool. YOU detects which updates are required and
automatically performs the necessary steps to verify and install them.
Alternatively, download the update packages for your distribution manually
and verify their integrity by the methods listed in Section 6 of this
announcement. Then install the packages using the command

rpm -Fhv <file.rpm>

to apply the update, replacing <file.rpm> with the filename of the
downloaded RPM package.


x86 Platform:

SUSE LINUX 10.0:
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/openssh-4.1p1-10.4.i586.rpm
3b4e0557d7d0a2b1d23b2c426af95df9
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/openssh-askpass-4.1p1-10.4.i586.rpm
ac11a5ad265e171674485961472baaaf

SUSE LINUX 9.3:
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/openssh-3.9p1-12.4.i586.rpm
2c6d16e14134a1a4f1aaba9ac4aef97f
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/openssh-askpass-3.9p1-12.4.i586.rpm
4cab20c7e83f6de0e440383939e69ec5

SUSE LINUX 9.2:
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openssh-3.9p1-3.6.i586.rpm
9b8cf778290ac743fd07445799f79b1f
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openssh-askpass-3.9p1-3.6.i586.rpm
003115e216c2b36da09ec3679744ba3d

SUSE LINUX 9.1:
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/openssh-4.1p1-11.16.i586.rpm
6e89bdd71e10933bf8e95dc7fad0c289
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/openssh-askpass-4.1p1-11.16.i586.rpm
3d0446f739bcea3715e6945d253b0d53

Power PC Platform:

SUSE LINUX 10.0:
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/openssh-4.1p1-10.4.ppc.rpm
3970357da536041d1ae3f7e42655aac7
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/openssh-askpass-4.1p1-10.4.ppc.rpm
6a79a95ece5bc7738998adad11205f2f

x86-64 Platform:

SUSE LINUX 10.0:
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/openssh-4.1p1-10.4.x86_64.rpm
e9eec927db0859a76851d1b94fa7923d
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/openssh-askpass-4.1p1-10.4.x86_64.rpm
b4a2b9cf969794d1deb1abd07f192786

SUSE LINUX 9.3:
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/openssh-3.9p1-12.4.x86_64.rpm
65416ca8578374fa4db63ed9e67f41a3
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/openssh-askpass-3.9p1-12.4.x86_64.rpm
3fef6bb43541532a654b09dd46201f69

SUSE LINUX 9.2:
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/openssh-3.9p1-3.6.x86_64.rpm
3373a79ef05695446f72fdc1a3ec2d44
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/openssh-askpass-3.9p1-3.6.x86_64.rpm
37ac73c4c9a7723fdcaeb16671b4c6b9

SUSE LINUX 9.1:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/openssh-4.1p1-11.16.x86_64.rpm
d04d20e03a63676d5c3349c382318194
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/openssh-askpass-4.1p1-11.16.x86_64.rpm
ea0deb3eef9970963af2c8c0adce6a7b

Sources:

SUSE LINUX 10.0:
ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/src/openssh-4.1p1-10.4.src.rpm
97ffd38b1144c4797d474c7de1eb6f51

SUSE LINUX 9.3:
ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/openssh-3.9p1-12.4.src.rpm
1d43324b9d51941bf60e8e0bcbfa25c7

SUSE LINUX 9.2:
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/openssh-3.9p1-3.6.src.rpm
647e4b45eba8dd5399c30dcb64db0c91

SUSE LINUX 9.1:
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/openssh-4.1p1-11.16.src.rpm
cf86431c7c2b1b0b58f6a5f4fff92893
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/openssh-4.1p1-11.16.src.rpm
c04ea03236cd9955c5f21f8c15a35416

Our maintenance customers are notified individually. The packages are
offered for installation from the maintenance web:

http://support.novell.com/cgi-bin/search/searchtid.cgi?psdb/c0a0e2dc5435936145cde433208b0b1b.html
http://portal.suse.com/psdb/c0a0e2dc5435936145cde433208b0b1b.html

______________________________________________________________________________

5) Pending Vulnerabilities, Solutions, and Work-Arounds:

See SUSE Security Summary Report.
______________________________________________________________________________

6) Authenticity Verification and Additional Information

- Announcement authenticity verification:

SUSE security announcements are published via mailing lists and on Web
sites. The authenticity and integrity of a SUSE security announcement is
guaranteed by a cryptographic signature in each announcement. All SUSE
security announcements are published with a valid signature.

To verify the signature of the announcement, save it as text into a file
and run the command

gpg --verify <file>

replacing <file> with the name of the file where you saved the
announcement. The output for a valid signature looks like:

gpg: Signature made <DATE> using RSA key ID 3D25D3D9
gpg: Good signature from "SuSE Security Team <security@suse.de>"

where <DATE> is replaced by the date the document was signed.

If the security team's key is not contained in your key ring, you can
import it from the first installation CD. To import the key, use the
command

gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc

- Package authenticity verification:

SUSE update packages are available on many mirror FTP servers all over the
world. While this service is considered valuable and important to the free
and open source software community, the authenticity and the integrity of
a package needs to be verified to ensure that it has not been tampered
with.

There are two verification methods that can be used independently from
each other to prove the authenticity of a downloaded file or RPM package:

1) Using the internal gpg signatures of the rpm package
2) MD5 checksums as provided in this announcement

1) The internal rpm package signatures provide an easy way to verify the
authenticity of an RPM package. Use the command

rpm -v --checksig <file.rpm>

to verify the signature of the package, replacing <file.rpm> with the
filename of the RPM package downloaded. The package is unmodified if it
contains a valid signature from build@suse.de with the key ID 9C800ACA.

This key is automatically imported into the RPM database (on
RPMv4-based distributions) and the gpg key ring of 'root' during
installation. You can also find it on the first installation CD and at
the end of this announcement.

2) If you need an alternative means of verification, use the md5sum
command to verify the authenticity of the packages. Execute the command

md5sum <filename.rpm>

after you downloaded the file from a SUSE FTP server or its mirrors.
Then compare the resulting md5sum with the one that is listed in the
SUSE security announcement. Because the announcement containing the
checksums is cryptographically signed (by security@suse.de), the
checksums show proof of the authenticity of the package if the
signature of the announcement is valid. Note that the md5 sums
published in the SUSE Security Announcements are valid for the
respective packages only. Newer versions of these packages cannot be
verified.

- SUSE runs two security mailing lists to which any interested party may
subscribe:

suse-security@suse.com
- General Linux and SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an e-mail to
<suse-security-subscribe@suse.com>.

suse-security-announce@suse.com
- SUSE's announce-only mailing list.
Only SUSE's security announcements are sent to this list.
To subscribe, send an e-mail to
<suse-security-announce-subscribe@suse.com>.

For general information or the frequently asked questions (FAQ),
send mail to <suse-security-info@suse.com> or
<suse-security-faq@suse.com>.

=====================================================================
SUSE's security contact is <security@suse.com> or <security@suse.de>.
The <security@suse.de> public key is listed below.
=====================================================================
______________________________________________________________________________

The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way. In particular, the
clear text signature should show proof of the authenticity of the text.

SUSE Linux Products GmbH provides no warranties of any kind whatsoever
with respect to the information contained in this security advisory.

Type Bits/KeyID Date User ID
pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>

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