Date: Fri, 13 Jun 2003 15:26:25 +0200 (CEST)
From: Thomas Biege <[email protected]>
To: [email protected]Subject: SuSE Security Announcement: radiusd-cistron (SuSE-SA:2003:030)
-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SuSE Security Announcement
Package: radiusd-cistron
Announcement-ID: SuSE-SA:2003:030
Date: Friday, Jun 13th 2003 09:32 MET
Affected products: 7.2, 7.3, 8.0
Vulnerability Type: possible remote system compromise
SuSE default package: no
Cross References: http://bugs.debian.org/cgi-bin/bugreport.cgi
?bug=196063
Content of this advisory:
1) security vulnerability resolved: handling too large NAS numbers
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- lprng
- frox
- poster
- ghostscript-library
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
The package radiusd-cistron is an implementation of the RADIUS protocol.
Unfortunately the RADIUS server handles too large NAS numbers not
correctly. This leads to overwriting internal memory of the server
process and may be abused to gain remote access to the system the RADIUS
server is running on.
There is no temporary workaround known.
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.
Please note, missing packages will be published as soon as possible.
Intel i386 Platform:
SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/radiusd-cistron-1.6.6-88.i386.rpm
e61fb299edfb092f24b3e455256cf262
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/radiusd-cistron-1.6.6-88.i386.patch.rpm
d323307d4bc4c0e4dc0bcef3f848b91f
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/radiusd-cistron-1.6.6-88.src.rpm
fc7718319972625612292798092d9a8b
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n3/radiusd-cistron-1.6.4-182.i386.rpm
ee949e18ef02e87dffc4b5ea8d5d5ec5
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/radiusd-cistron-1.6.4-182.src.rpm
f4f87aab549967c0d4c216c8d2e312a1
SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/n3/radiusd-cistron-1.6.4-182.i386.rpm
e5a20985f79c887739ce0b83539c347b
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/radiusd-cistron-1.6.4-182.src.rpm
f5f73b9e9c3e5d338bfddd1a6b2b14d8
Sparc Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n3/radiusd-cistron-1.6.4-70.sparc.rpm
7318cc63ec3c29618b81ae6c8eb29fc8
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/radiusd-cistron-1.6.4-70.src.rpm
0212fba5fd8d4ff3e9afe4a8a8802655
PPC Power PC Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n3/radiusd-cistron-1.6.4-108.ppc.rpm
30f9920f2a8d2db0e8eb2a0439d61118
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/radiusd-cistron-1.6.4-108.src.rpm
8133911f08442832c383000cb65e70ca
______________________________________________________________________________
2) Pending vulnerabilities in SuSE Distributions and Workarounds:
- lprng
A race condition in psbanner was fixed that can be abused by local
users to overwrite file owned by daemon:lp.
New packages are available on out FTP servers.
- frox
The init script of frox handled tmp file in an insecure manner.
This behavior can be exploited by local users.
New packages are available on out FTP servers.
- poster
A possible buffer overflow due to usage of gets() was fixed which could
have been exploited by malicious input data to execute code under the
user id of the user running poster.
New packages are available on out FTP servers.
- ghostscript-library
Malicious PostScript[tm] files could execute shell commands
even if the ghostscript interpreter was invoked with the -dSAFER
flag.
______________________________________________________________________________
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 [email protected]),
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 "[email protected]" 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:
[email protected]
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email to
<[email protected]>.
[email protected]
- SuSE's announce-only mailing list.
Only SuSE's security announcements are sent to this list.
To subscribe, send an email to
<[email protected]>.
For general information or the frequently asked questions (faq)
send mail to:
<[email protected]> or
<[email protected]> respectively.
SuSE's security contact is <[email protected]> or <[email protected]>.
The <[email protected]> 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 <[email protected]>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <[email protected]>
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Bye,
Thomas
--
Thomas Biege <[email protected]>
SuSE Linux AG,Deutschherrnstr. 15-19,90429 Nuernberg
Function: Security Support & Auditing
"lynx -source http://www.suse.de/~thomas/contact/thomas.asc | gpg --import"
Key fingerprint = 7254 B15D B3C4 943F 485E 0BBD 8ECC D7CB C200 A213
--
Das erste Opfer einer Schlacht ist immer der Schlachtplan.
