Date: Fri, 21 Mar 2003 13:54:49 +0100 (CET)
From: Thomas Biege <[email protected]>
To: [email protected]Subject: SuSE Security Announcement: ethereal (SuSE-SA:2003:019)
-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SuSE Security Announcement
Package: ethereal
Announcement-ID: SuSE-SA:2003:019
Date: Friday, Mar 21th 2003 10:12 MET
Affected products: 7.1, 7.2, 7.3, 8.0, 8.1
SuSE Linux Database Server,
SuSE eMail Server III, 3.1
SuSE Linux Enterprise Server 7,
SuSE Linux Firewall on CD/Admin host
SuSE Linux Connectivity Server
SuSE Linux Office Server
Vulnerability Type: local privilege escalation
Severity (1-10): 3
SuSE default package: yes
Cross References: CAN-2003-0081
Content of this advisory:
1) security vulnerability resolved:
- buffer overlfow
- format string bug
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- mutt
- kernel
- apcupsd
- vnc
- openssl
- mod_php4
- pgp4pine
- nethack
- netpbm
- man
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
Ethereal is a GUI for analyzing and displaying network traffic.
Ethereal is vulnerable to a format string bug in it's SOCKS code
and to a heap buffer overflow in it's NTLMSSP code.
These bugs can be abused to crash ethereal or maybe to execute
arbitrary code on the machine running ethereal.
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-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/ethereal-0.9.6-152.i586.rpm
1ea03e4f888f30bc37669ea4dd0cfe30
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/ethereal-0.9.6-152.i586.patch.rpm
317046452887bdb6d9bc3882909540f1
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/ethereal-0.9.6-152.src.rpm
831fd8c3f888a7bf832422aa58a5ea35
SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/ethereal-0.9.6-153.i386.rpm
3e4762aa5dabfce6dc8bce77ff623d7f
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/ethereal-0.9.6-153.i386.patch.rpm
9404cb917fb1ab56a59746d1c12a9c81
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/ethereal-0.9.6-153.src.rpm
1846c9dfe0ba59e99966a63d3ba0e645
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/ethereal-0.9.6-154.i386.rpm
e9f55cdf8d89f0dee322f5829908d3d9
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/ethereal-0.9.6-154.src.rpm
57f1589a18d614afa17a0f779625adff
SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/ethereal-0.9.6-155.i386.rpm
c7362031d0082b097d50bed249e170bf
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/ethereal-0.9.6-155.src.rpm
39b2f8a42575f42c9f68d7d8b8b41cd7
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/i386/update/7.1/n2/ethereal-0.9.6-156.i386.rpm
b6a7c65cc20e0bb901bf1599ff107e6a
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/ethereal-0.9.6-156.src.rpm
b650101ce46e7f8050c674cfb275cfe6
Sparc Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/ethereal-0.9.6-57.sparc.rpm
e979f24ce5292a2a698f752d67bfa916
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/ethereal-0.9.6-57.src.rpm
32504bc48c8e6771ff6285c59668d282
AXP Alpha Platform:
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/axp/update/7.1/n2/ethereal-0.9.6-80.alpha.rpm
111e039aafef5669863b6d502392d115
source rpm(s):
ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/ethereal-0.9.6-80.src.rpm
2373bb476bb8bea7667e9621411fbc0f
PPC Power PC Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/ethereal-0.9.6-90.ppc.rpm
ab58afaae72d603941de12ad97baba39
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/ethereal-0.9.6-90.src.rpm
ba0fbd761194112f0a09c8422f54a25b
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n2/ethereal-0.9.6-92.ppc.rpm
dbad6f03abc69882ce47a78360cde7fa
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/ethereal-0.9.6-92.src.rpm
05517631f384f6244d26a5dc3bb4a3c7
______________________________________________________________________________
2) Pending vulnerabilities in SuSE Distributions and Workarounds:
- mutt
A buffer overflow in mutt's IMAP code may result in remote system
compromise.
New packages are currently being build and will be available soon.
- kernel
A bug in the Linux kernel was found that allows local users to
become root. The bug can just be exploited if ptrace(2) is allowed,
LKM and kmod support is enabled.
We already build new kernels and are currently testing them.
As a workaround kernel module loading can be disabled after every
boot by executing the following action as root:
# echo /just/a/temporary/workaround > /proc/sys/kernel/modprobe
Please note, that this will disable some services.
- apcupsd
The control and management daemon for APC UPS systems is vulnerable
to remote code execution due to buffer overflow and format string bugs.
A dedicated advisory for this issue will be released as soon as all
packages are being build.
- vnc
VNC (Virtual Network Computing) uses a weak cookie generation process
which can be exploited by an attacker to bypass authentication.
New packages are currently being tested and will be available on our
FTP servers soon.
- openssl
A paper regarding remote timing attacks against OpenSSL has been
published by researchers of the Stanford University. It is possible
to extract the private RSA key used by services using OpenSSL by
observing their timing behavior.
Additionally czech researchers found another bug in OpenSSL which
is an extension of the "Bleichenbacher Attack".
Fixed packages will be available on our FTP servers soon.
- mod_php4 4.3.0
A serious security vulnerability was found in mod_php 4.3.0 which
allows a remote attacker to read files or even execute PHP-code.
This was possible due to direct access to the CGI module.
SuSE does not ship this vulnerable version.
- pgp4pine
A buffer overflow in pine's filter add-on pgp4pine can be abused
to execute arbitrary commands remotely. The pgp4pine version
SuSE ships is not vulnerable to this bug.
- nethack
A buffer overflow in nethack can be exploited local users to gain
higher privileges if the nethack binary is installed setuid/setgid.
This bug is fixed for upcoming SuSE Linux versions. As a temporary
workaround you should disable all s-bits on the nethack binary
(/etc/permissions.local).
- netpbm
The netpbm package contains various integer overflows which can
lead to arbitrary code execution. New packages are published on our
FTP servers.
- man
A vulnerability in man was published that allows local privilege
escalation. SuSE Linux does not ship this vulnerable version of man.
______________________________________________________________________________
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
