|
|
The PAM module (and server) pam_smb allows users of Linux systems to be authenticated by querying an NT server. Dave Airlie <airlied@samba.org> informed us about a bug in the authentication code of pam_smb that allows a remote attacker to gain access to a system using pam_smb by issuing a too long password string.
|
|
-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SuSE Security Announcement
Package: pam_smb
Announcement-ID: SuSE-SA:2003:036
Date: Wednesday, Sep 3nd 2003 16:40 MEST
Affected products: 7.2, 7.3, 8.0, 8.1, 8.2
SuSE Linux Database Server,
SuSE eMail Server III, 3.1
SuSE Linux Enterprise Server 7, 8
SuSE Linux Firewall on CD/Admin host
SuSE Linux Connectivity Server
SuSE Linux Office Server
Vulnerability Type: remote privilege escalation
Severity (1-10): 6
SuSE default package: no
Cross References:
Content of this advisory:
1) security vulnerability resolved: buffer overflow
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- gdm2
- whois
- node
- postgresql
- gkrellm
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
The PAM module (and server) pam_smb allows users of Linux systems to
be authenticated by querying an NT server.
Dave Airlie <airlied@samba.org> informed us about a bug in the
authentication code of pam_smb that allows a remote attacker to gain
access to a system using pam_smb by issuing a too long password string.
Please download the update package for your distribution and verify its
integrity by the methods listed in section 3) of this announcement.
Then, install the package using the command "rpm -Fhv file.rpm" to apply
the update.
Our maintenance customers are being notified individually. The packages
are being offered to install from the maintenance web.
Intel i386 Platform:
SuSE-8.2:
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/pam_smb-1.1.6-501.i586.rpm
77b933d95963020022c0b8ec426b1b33
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/pam_smb-1.1.6-501.i586.patch.rpm
be26f459b855e0eb8a7aeb048966aff2
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/pam_smb-1.1.6-501.src.rpm
f533ca1293f8a70db9d5ad2cc1aca1eb
SuSE-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/pam_smb-1.1.6-500.i586.rpm
b12d1f7897319eabaccd3241c40a022a
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/pam_smb-1.1.6-500.i586.patch.rpm
7bac2fa8229633f5329e51cc4474514f
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/pam_smb-1.1.6-500.src.rpm
84a8f0156950582354832d9850964829
SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/pam_smb-1.1.6-500.i386.rpm
d340b5e40b5a70ba91613c6328995b32
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/pam_smb-1.1.6-500.i386.patch.rpm
f60ff0bb02f6e5d0346db13075cb819a
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/pam_smb-1.1.6-500.src.rpm
1bbd9e875b5952dedfe2b5a0754e5619
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/pam_smb-1.1.6-501.i386.rpm
7223b46ae84c85e343c9ebbf1b7d93fc
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/pam_smb-1.1.6-501.src.rpm
d98153d86906f0c658fc076c4e7bc2e3
SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/pam_smb-1.1.6-500.i386.rpm
5e13b0856e21bdfcf5f6b7bd3da6aced
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/pam_smb-1.1.6-500.src.rpm
21a70e45e84f518f33c0180d145b922f
Sparc Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/pam_smb-1.1.6-147.sparc.rpm
c6d8dc37b190d80d198565391455547a
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/pam_smb-1.1.6-147.src.rpm
da99ca714612b897b035477aaae5b600
PPC Power PC Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/pam_smb-1.1.6-328.ppc.rpm
0287905509e5d134ff9cd07be7aad701
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/pam_smb-1.1.6-328.src.rpm
55659805dada2721d5d0f5598e3ede27
______________________________________________________________________________
2) Pending vulnerabilities in SuSE Distributions and Workarounds:
- gdm2
Due to a bug in GDM it is possible for local users to read any text
file on a system by creating a symlink from ~/.xsession-errors.
Updated packages will be available on our FTP servers soon.
- whois
The client tool whois is vulnerable to several buffer overflows
while processing its command-line arguments. In conjunction with using
untrusted data from remote sources as input, like using whois in a CGI
script and so on, this buffer overflows may be abused to compromise
a system.
New whois packages are built and will be released at the usual
locations as soon as quality assurance is passed.
- node
The simple hamradio front-end node is vulnerable to buffer overflows
and format-string bugs.
New packages will be available soon.
- postgresql
The SQL database server postgresql of version 7.3.x prior 7.3.4 is
vulnerable to buffer overflow attacks.
New packages will be available soon.
- gkrellm
The server component of the gkrellm monitoring package is
vulnerable to a buffer overflow.
News packages will be available soon.
______________________________________________________________________________
3) standard appendix: authenticity verification, additional information
- Package authenticity verification:
SuSE update packages are available on many mirror ftp servers all over
the world. While this service is being considered valuable and important
to the free and open source software community, many users wish to be
sure about the origin of the package and its content before installing
the package. 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) md5sums as provided in the (cryptographically signed) announcement.
2) using the internal gpg signatures of the rpm package.
1) execute the command
md5sum <name-of-the-file.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
announcement. Since the announcement containing the checksums is
cryptographically signed (usually using the key security@suse.de),
the checksums show proof of the authenticity of the package.
We disrecommend to subscribe to security lists which cause the
email message containing the announcement to be modified so that
the signature does not match after transport through the mailing
list software.
Downsides: You must be able to verify the authenticity of the
announcement in the first place. If RPM packages are being rebuilt
and a new version of a package is published on the ftp server, all
md5 sums for the files are useless.
2) 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, where <file.rpm> is the
filename of the rpm package that you have downloaded. Of course,
package authenticity verification can only target an un-installed rpm
package file.
Prerequisites:
a) gpg is installed
b) The package is signed using a certain key. The public part of this
key must be installed by the gpg program in the directory
~/.gnupg/ under the user's home directory who performs the
signature verification (usually root). You can import the key
that is used by SuSE in rpm packages for SuSE Linux by saving
this announcement to a file ("announcement.txt") and
running the command (do "su -" to be root):
gpg --batch; gpg < announcement.txt | gpg --import
SuSE Linux distributions version 7.1 and thereafter install the
key "build@suse.de" upon installation or upgrade, provided that
the package gpg is installed. The file containing the public key
is placed at the top-level directory of the first CD (pubring.gpg)
and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .
- SuSE runs two security mailing lists to which any interested party may
subscribe:
suse-security@suse.com
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email 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 email 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> respectively.
=====================================================================
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,
it is desired that the clear-text signature shows proof of the
authenticity of the text.
SuSE Linux AG makes 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>
- -----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org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=LRKC
- -----END PGP PUBLIC KEY BLOCK-----
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)
iQEVAwUBP1YMrXey5gA9JdPZAQHTEgf/X1chps/rv6DCOXiT4M6lYSWQI5jydnKB
SMBgObCg0qViZlurwT5yuJ2EHVV7LEKMN2Mw/W2emN26sJ1EnPEkDAtRAMzPmOwN
TWASVgdvmPnW40ZNV1oMCZ5HrsGr3sgb6uHf1Fhix74VQdW9Zu7CH4Tu1s/ionkC
MX4n5HQrDqu/6GZ0jGDBY0625L8j2KoGTuFwYRqP8t9AUS4xHiXyxJg8xc37ffwM
KQj9f/Y9aezIL0RM6itdQslRpGkH6Wh2Sc9jHtzx8nhyO641Q50eqU7dH79PyB+1
ZKGy2dkZ+D6WnZ//wuNDPJexXc4OAioNF51XlFboT5eOAG1yjMdGqg==
=hiNx
-----END PGP SIGNATURE-----
Bye,
Thomas
--
Thomas Biege <thomas@suse.de>
SuSE Linux AG,Deutschherrnstr. 15-19,90429 Nuernberg
Function: Security Support & Auditing
"lynx -source http://www.suse.de/~thomas/contact/thomas.asc | pgp -fka"
Key fingerprint = 51 AD B9 C7 34 FC F2 54 01 4A 1C D4 66 64 09 83
--
... bring the pieces back together, we discover communication...
- Maynard James Keenan
--
To unsubscribe, e-mail: suse-security-announce-unsubscribe@suse.com
For additional commands, e-mail: suse-security-announce-help@suse.com
This archive was generated by hypermail 2.1.7
: Wed Sep 03 2003 - 17:57:53 CEST
| 
