Hi all,
here's a bit of a step-by-step description on how to keep nimda
and codered from filling your apache logs.
Parts used:
- SuSE 7.2 Professional
- SuSEfirewall2
- iptables 1.2.3
- linux kernel 2.4.13-pre5
steps:
1. install kernel sources for a kernel >> 2.4.9, running 2.4.13-
pre5 here, works fine so far
2. get the sources for iptables 1.2.3 from
http://netfilter.samba.org
3. unpack sources somewhere
4. export KERNEL_DIR=$(where you put the kernel tree)
5. cd into unpacked iptables sources, there's a subdirectory
named patch-o-matic there
6. apply wanted patches by running ./runme $(name.of.patch)patch
for this here You'll want the string patch
You can also apply other patches, like the irc-conntrack patch
7. now there's a little bug in this patch...
here's a diff:
--- linux/net/ipv4/netfilter/ipt_string.c~ Sun Oct 21
00:16:29 2001
+++ linux/net/ipv4/netfilter/ipt_string.c Sun Oct 21
16:54:45 2001
@@ -62,7 +62,7 @@
sk = skip[haystack[right_end - i]];
sh = shift[i];
- right_end = max(int, right_end - i + sk,
right_end + sh);
+ right_end = max(right_end - i + sk, right_end +
sh);
}
return NULL;
8. now, make config/menuconfig/xconfig... as usual. You can
import your running kernel's config first.
9. enable the experimental stuff
10. go to networking options->netfilter, there's an option there
to enable string matching; set that to M
11. compile and install kernel as usual; remember to uncomment
the export INSTALL_PATH=/boot in the main makefile.
12. now build a rpm file for the new iptables stuff by installing
the source rpm which comes with suse, then edit the spec file,
put the iptables source in /usr/src/packages/SOURCE and rebuild.
13. now there are some small changes to the firewall config
files.
a) uncomment the last line in
/etc/rc.config.d/firewall2.rc.config:
FW_CUSTOMRULES="/etc/rc.config.d/firewall2-custom.rc.config"
b) edit that file, I got the following stuff in mine:
for forbidden_string in root.exe cmd.exe .ida; do
iptables -I input_ext -p tcp --dport http -m string \
--string $forbidden_string -m state \
--state ESTABLISHED -j REJECT --reject-with tcp-reset
done
put that in the last supfunction defined in the custom rc file.
c) change the FW_LOG setting in firewall2.rc.config from reading
-log-level warning to -log-level kernel.warning
14. last: some small changes to /sbin/SuSEfirewall2
search in the script for the parts where the modules are loaded
and unloaded; be sure to add ipt_string (and the other new
modules you created by patching the kernel and enabling them in
make config) to the modules loading/unloading code there.
15. reboot
16. if you try now to access (from outside, of course) one of the
nimda or codered URLS, all you get is a 'connection reset by
peer', and the request doesn't show in apache log files.
btw, no guarantees, and the usual YMMV :)
bye
[L]
Hi,
I use suse 7.3
Internal network connect to internet by setting port
3128 in IE but when i set in squid.conf for
authenticate_program that get windows login for users,
IE don't get any windows and Internal network
(clients) connect to internet normally without login
I set these options in squid.conf:
authenticate_program /usr/sbin/pam_auth
acl password proxy_auth payam
acl users src 192.168.1.0/255.255.252.0
http_access allow users
http_access allow password
Is here any problem with this configuration that IE
can't get windows login when want to browsing?
Thanks for your help,
Payam
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Hi,
I have the following in my /var/log/warn file :
Feb 28 13:51:37 plato kernel: SuSE-FW-ILLEGAL-TARGET IN=ppp0 OUT= MAC= SRC=xx.xx.xx.xx DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=55846 PROTO=2
I've read that this message is basically a misconfigured router from my DSL supplier.
However what I'd like to know is, what can I add to my SuSEFirewall config so that I
can skip logging these messages (i.e. ignore any 224.0.0.1 messages )?
Thanks
CPH
Hi Prabu
you see that it is ssh if you look at the destination port DST it is 22 or SSH
.
Ian
---------- Forwarded Message ----------
Subject: RE: [suse-security] My SuSEFirewall blocks something than my LAM can
not surfing in internet anymore.
Date: Fri, 28 Feb 2003 06:01:33 -0800 (PST)
From: Prabu Subroto <prabu_subroto(a)yahoo.com>
To: SuSE Security Milis <suse-security(a)suse.com>
Dear Peer....
I tried the command line from you. But the output is
empty...
I grep nothing...
I will repeat this threat from you if the problem
comes again.
Btw, how can you know that what I send to you was only
ssh?
Please help me, I am stucked...
--- Peer Stefan <stefan.peer(a)tiwag.at> wrote:
> Hi Prabu,
>
> Sorry to say so, but this trace shows nothing more
> than a connection-trace of your ssh-session (DPT=22
> ...).
> Don't tail /var/log/messages, it's quite big and
> gets filled really fast.
> Do a "cat /var/log/messages|grep DTP=80|grep -v
> DST=192.168.23.10" in order to get all the outgoing
> http-stuff.
>
> so long,
> Stefan
>
> btw. I'm called Stefan - it's a bit queer here in
> Austria, we always put the last name in front ;-)
>
> > From: Prabu Subroto
>
> [mailto:prabu_subroto@yahoo.com]
>
> > Dear my friend, Peer...
> >
> > Today morning, it happened again. I follow your
>
> advice
>
> > and this is the 60 lines of my "/var/log/messages"
> > file:
> > "
> > proxy:/var/log # tail -n 60 messages
> > Feb 27 14:04:49 proxy kernel:
> > SuSE-FW-ACCEPT-ALL-INTERNAL IN=eth0 OUT=
> > MAC=00:50:bf:77:77:d5:00:50:bf:77:80:49:08:00
> > SRC=192.168.23.237 DST=192.168.23.10 LEN=52
>
> TOS=0x10
>
> > PREC=0x00 TTL=64 ID=4343 DF PROTO=TCP SPT=1132
>
> DPT=22
>
Hi
> From: Prabu Subroto [mailto:prabu_subroto@yahoo.com]
> Dear my collegues...
>
> I have SuSE Linux 8.1 with SuSEfirewall2, BIND 8,
> ip-masquerading and squid server. This server use ISDN
> dial up to arcor (www.arcor.de).
>
> Everything runs properly, I have opened "53 3128 67 25
> 110". But after sometimes than my LAN User can not
> surfing to internet anymore but they still can use
> e-mail (pop and smtp) properly.I don't know when the
> problem comes, lookslike after our ISP reset/change
> the IP number of our ISDN card (I guess so).
>
> The LAN user can go to the internet only after I
> restart my SuSEfirewall, such as:
> "
> SuSEfirewall2 stop
> SuSEfirewall2 start
> "
>
> Thank you very much.
Have a look at /var/log/messages -> are there any entries which show dropped or rejected packages?
>
> ps. If I start my SuSEfirewall2 than comes this error
> message:
> "
> proxy:~ # SuSEfirewall2 start
> Warning: FW_SERVICE_DNS defined, but no DNS server
> found running!
> proxy:~ #
> "
Does your DNS crash sometimes? Again look at /var/log/messages, it's all in there ;-)
-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SuSE Security Announcement
Package: hypermail
Announcement-ID: SuSE-SA:2003:0012
Date: Thursday, Feb 27th 2003 18:30 MET
Affected products: 7.1, 7.2, 7.3, 8.0, 8.1
Vulnerability Type: remote system compromise
Severity (1-10): 4
SuSE default package: no
Cross References: CAN-2003-0025
Content of this advisory:
1) security vulnerability resolved: several bugs after source code
review
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- vnc
- w3m
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
Hypermail is a tool to convert a Unix mail-box file to a set of cross-
referenced HTML documents.
During an internal source code review done by Thomas Biege several bugs
where found in hypermail and its tools. These bugs allow remote code
execution, local tmp race conditions, denial-of-service conditions and
read access to files belonging to the host hypermail is running on.
Additionally the mail CGI program can be abused by spammers as email-
relay and should thus be disabled.
There is no temporary fix known other then disabling hypermail. Please
download and install the new packages from our FTP servers.
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-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/hypermail-2.1.4-58.i58…
a4b683703b65cb65d0d1b246c2bf652d
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/hypermail-2.1.4-58.i58…
9e087a97c250c8987dda03da43e0dd1e
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/hypermail-2.1.4-58.src.…
9d95d9872a3ed98a4dbff25e952335d7
SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/ap4/hypermail-2.1.3-234.i386.rpm
53bdfc3ca1ab0c504f460ac7a18ba42e
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/hypermail-2.1.3-234.src.rpm
be0df42b666fc59e38babd671479d2f1
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/ap2/hypermail-2.1.2-141.i386.rpm
81194dcbb3cf149f67eac9948dd79db9
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/hypermail-2.1.2-141.src.rpm
9a02ce79e81bab281c418070fa91dbde
SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/ap2/hypermail-2.1.0-91.i386.rpm
d61f52df6c995b65e16a4141b1b7efa1
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/hypermail-2.1.0-91.src.rpm
66b65eed8f2daefde8115abf77511bba
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/i386/update/7.1/ap2/hypermail-2.0b29-59.i386.rpm
698338c7d9b8961ec3d4f4ab99ee2436
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/hypermail-2.0b29-59.src.rpm
8db31cd4981ee84a0333ec8200443bef
Sparc Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/ap2/hypermail-2.1.2-40.sparc.r…
341757885457f2e4b018dbb132f1a8f8
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/hypermail-2.1.2-40.src.rpm
cdc92a18900996524768914c79bf20d9
AXP Alpha Platform:
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/axp/update/7.1/ap2/hypermail-2.0b29-37.alpha.rpm
980f217c12affcb3c0a6d0fd916a5115
source rpm(s):
ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/hypermail-2.0b29-37.src.rpm
a2242ecc8ba2a13c3d18ca94e6ba23f0
PPC Power PC Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/ap2/hypermail-2.1.2-98.ppc.rpm
6c7a197fe18a95b7594b2cd7b572837a
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/hypermail-2.1.2-98.src.rpm
e370de5432545f06731c9f841bc84054
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/ap2/hypermail-2.0b29-38.ppc.rpm
64b3be05678f4789985824e31f8335d2
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/hypermail-2.0b29-38.src.rpm
4cd2b65522738594d0b60333f807b8b2
______________________________________________________________________________
2) Pending vulnerabilities in SuSE Distributions and Workarounds:
- 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.
- w3m
The textbased web-browser w3m does not properly escape HTML tags.
A malicious HTML page or img alt attribute may lead to information
leakage. New 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(a)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(a)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(a)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(a)suse.com>.
suse-security-announce(a)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(a)suse.com>.
For general information or the frequently asked questions (faq)
send mail to:
<suse-security-info(a)suse.com> or
<suse-security-faq(a)suse.com> respectively.
=====================================================================
SuSE's security contact is <security(a)suse.com> or <security(a)suse.de>.
The <security(a)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(a)suse.de>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build(a)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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Bye,
Thomas
--
Thomas Biege <thomas(a)suse.de>
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
--
Swimming through the Void
We hear the Words
We lose Ourselves
But we find it All
-- Serj Tankian (Arials Lyrics)
-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SuSE Security Announcement
Package: openssl
Announcement-ID: SuSE-SA:2003:011
Date: Wednesday, Feb. 26th 2003 15:20 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 Enterprise Server 8
SuSE Linux Firewall on CD/Admin host
SuSE Linux Connectivity Server
SuSE Linux Office Server
Vulnerability Type: remote attack on encryption
Severity (1-10): 5
SuSE default package: yes
Cross References: CAN-2003-0078
Content of this advisory:
1) security vulnerability resolved: openssl
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- vnc
- w3m
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
OpenSSL is an implementation of the Secure Sockets Layer and Transport
Layer Security protocols and provides strong cryptography for many
applications in a Linux system. It is a default package in all SuSE
products.
A security weakness has been found, known as "Vaudenay timing attack
on CBC", named after one of the discoverers (Brice Canvel (EPFL), Alain
Hiltgen (UBS), Serge Vaudenay (EPFL), and Martin Vuagnoux (EPFL, Ilion)).
The weakness may allow an attacker to obtain a plaintext data block by
observing timing differences in response to two different error cases
(cipher padding errors vs. MAC verification errors).
In order to exploit this vulnerability, the attacker has to meet certain
requirements: The network connection between client and server must be
of high quality to be able to observe timing differences, the attacker
must be able to perform a man-in-the-middle attack, the transactions
must repeatedly contain the same (encrypted) plain text block (such as
a pop password or alike), and decoding failures in the SSL layer must
not be propagated to the application that is using the SSL connection.
These exploitation conditions considerably reduce the security risk
imposed by the vulnerability. However, we recommend to completely
remedy this weakness by installing the update packages for your system
according to the following guidelines. There does not exist any temporary
workaround for this problem other than applying the update packages.
Please download the update package for your distribution and verify its
integrity by the methods listed in section 3) of this announcement.
Our maintenance customers are being notified individually. The packages
are being offered to install from the maintenance web.
SPECIAL INSTALLATION INSTRUCTIONS:
====================================
Please update your openssl package using the command
rpm -Fhv <package.rpm>
The operation of this command must not be interrupted! An interrupted
update of the openssl package may cause large protions of your system to
fail.
After performing the update, it is adviseable to run the command
"ldconfig" to update the shared library loading cache.
After the update, running processes in your system will continue to
use the shared libraries from the old package before the update.
Generally, it is necessary to restart all of these processes to
completely fix the vulnerability in your system. The command
lsof -n 2>/dev/null | grep RPMDELETE
can be used to find the binaries and processes that still use the old
shared libraries. In all cases, the next reboot of the system will cause
the old shared libraries to be completely removed from the system.
Alternatively, a transition to runlevel 1 (single user mode) and back
to the default runlevel will have the same effect.
Intel i386 Platform:
SuSE-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-0.9.6g-55.i586…
7fbf4d975180a20ff8dedc8adbdecc59
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-0.9.6g-55.i586…
6ed4321ec536aa718189702470c33091
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/openssl-0.9.6g-55.src.r…
90fc753346dd2aff00eee4c530cea84a
SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/sec1/openssl-0.9.6c-83.i386.rpm
d6246b820780993cc0e2b48597743a8f
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/sec1/openssl-0.9.6c-83.i386.pat…
2d933e913a9062de6a1fa35de969d211
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/openssl-0.9.6c-83.src.rpm
b4b887a7311e9734a14d11e1a380f76e
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/sec1/openssl-0.9.6b-154.i386.rpm
d3c0f892441c09c8c5a689e2af04ba55
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/openssl-0.9.6b-154.src.rpm
31ec962fe3549a713b9e6937190a88fb
SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/sec1/openssl-0.9.6a-78.i386.rpm
d14f67c34c589f168b750b18c9162508
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/openssl-0.9.6a-78.src.rpm
2ba5a416d6ca3cb75c9aabb5a25bb532
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/i386/update/7.1/sec1/openssl-0.9.6a-78.i386.rpm
c6b711573555982fadd31cfa179dd9dc
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/openssl-0.9.6a-78.src.rpm
d00df30aa6ec6a3872c58da709181879
Sparc Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/sec1/openssl-0.9.6b-87.sparc.r…
6a8f19a49a698b93e740121321f59e5d
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/openssl-0.9.6b-87.src.rpm
50712c3fd35042278063622ad5cc77c7
AXP Alpha Platform:
The packages for the 7.1-axp distribution will be published soon.
PPC Power PC Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/sec1/openssl-0.9.6b-147.ppc.rpm
051ef85d8e711819b2de38f55dc0023a
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/openssl-0.9.6b-147.src.rpm
58631776b8fa88932eb57069a7f2878e
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/sec1/openssl-0.9.6a-28.ppc.rpm
da5e7caa177316f3016dd98497e580de
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/openssl-0.9.6a-28.src.rpm
b317144556c8f1890d15f304d95c5764
______________________________________________________________________________
2) Pending vulnerabilities in SuSE Distributions and Workarounds:
- 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.
- w3m
The textbased web-browser w3m does not properly escape HTML tags.
A malicious HTML page or img alt attribute may lead to information
leakage. New 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(a)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(a)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(a)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(a)suse.com>.
suse-security-announce(a)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(a)suse.com>.
For general information or the frequently asked questions (faq)
send mail to:
<suse-security-info(a)suse.com> or
<suse-security-faq(a)suse.com> respectively.
=====================================================================
SuSE's security contact is <security(a)suse.com> or <security(a)suse.de>.
The <security(a)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(a)suse.de>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build(a)suse.de>
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--
- -
| Roman Drahtmüller <draht(a)suse.de> // "You don't need eyes to see, |
SuSE Linux AG - Security Phone: // you need vision!"
| Nürnberg, Germany +49-911-740530 // Maxi Jazz, Faithless |
- -