openSUSE Security March 2000

security@lists.opensuse.org

93 participants
70 discussions

Re: [suse-security] *WANTED: ipchains guru*
by Chrissy LeMaire 16 Mar '00

16 Mar '00

> > I think you mean forwarding ports to other machines (as opposed to >just redirecting them on a particular interface/machine). Oui :) > As for ipchains, i think it can do port forwarding itself-- this >is from /sbin/ipchains --help: > > --destination -d [!] address[/mask] [!] [port[:port]] > destination specification The destination, as far as I know is where the packet is headed. For instance, one of my chains says /sbin/ipchains -A input -p tcp -s 0/0 -d 192.168.0.1/32 80 -j ACCEPT "if the source of the packet is coming from any ip (0/0) and its destination is port 80 my own ip (192.168.0.1) ..accept it." I fiddled with getting ipchains to do what redir does a few months ago..and did not get anywhere. ipchains can be used to redirect (-j REDIRECT) one port to another (ex. 192.168.0.1:80 -> 192.168.0.1:21), on the same IP address..but not to another IP address.. Chrissy

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*WANTED: ipchains guru*
by KULISHdotCOM 16 Mar '00

16 Mar '00

Looking for someone to take a look at my ipchains script. I don't want to post it on the list as it is kind of long. A little background is in order. I want to setup an ipchains firewall to do the following: Deny everythind that is not explicitly allowed. I have a server sitting behind it that will host pop3, smtp, www, and ftp so I will need to forward all these ports. I want to allow everyone on the local network to ANYTHING out on the internet. I want to log any denials and protect against IP spoofing (and anything else that might be dangerous). If anyone is willing to help, I will send them my annotated script to take a look at. I do realize that some things are missing (probably the stuff I need help on). I have read all the HOW-TOs that I can find but something isn't clicking. Thanks for any HELP! CK

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which ssh vs. to use?
by Jan Kr�ger 16 Mar '00

16 Mar '00

-----BEGIN PGP SIGNED MESSAGE----- Hi, has anyone suggestions about which ssh version is "better" (e.g. more secure) to use: the last open source (is it?) version 1.2.27 or the proprietary 2.0.xx, except that open source code is more transparent? - -- The fjutscha is unwritten! - - PGP- or GnuPG-Key on request - -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv iQEVAwUBOM+0sEjWXFgvINoZAQGm8AgAiwCpvUbQnaOqCwacclWL6oTquqkkNcPy H9OcYVxuMN7qDNt34nocJCgmM8kElzny/dEbM8PcD/3yFTuy95jEpglMHr9VajnV 8MCOshoYtPlAlzq8T5jiY4+Lu50B8m9akrJIV5XQFjKcaF7ywPjLUoHfeklmOHzR JHmZ1XY6Q+2IvVhNp5wQa7ixCL83YGcylzfQeMezRnI+4glPpWbxa0siP7UDOzt7 XO6CvVW1uuHxiOjYy3QdugrpodBvoyJvc/eFCvzSNftjCIkeRfoXKq4sms9X7DMv 5GuVyBvB+YpqZlTwvo2Q/ymz2CyUpIzlZcvYxtW8Wcg9WpWss8Um5Q== =ajf2 -----END PGP SIGNATURE-----

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SuSE Security Announcement - SuSE Linux IMAP Server
by marc＠suse.de 15 Mar '00

15 Mar '00

-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SuSE Security Announcement Package: SuSE Linux IMAP Server Date: Wed Mar 15 20:41:42 CET 2000 Affected SuSE versions: SuSE Linux IMAP Server Vulnerability Type: remote unauthorized access SuSE default package: not a SuSE Linux Distribution package Other affected systems: no ______________________________________________________________________________ A security hole was discovered in the package mentioned above. Please update as soon as possible or disable the service if you are using this software on your SuSE Linux installation(s). Please note that we provide this information on an "as-is" basis only. There is no warranty whatsoever and no liability for any direct, indirect or incidental damage arising from this information or the installation of the update package. _____________________________________________________________________________ 1. Problem Description A vulnerability in the SuSE Linux IMAP Server - which is unrelated to the SuSE Linux Distribution (which is unaffected) - was found which allows remote users to circumvented the imap authentication. 2. Impact An attacker can receive imap administrator privilige which can be used e.g. to create or delete folders. 3. Solution Install the security fix from our FTP server. ______________________________________________________________________________ Please verify these md5 checksums of the updates before installing: bf746792686246b631996af8144f45d2 http://www.suse.de/de/produkte/susesoft/imas/imasupd/secfix.tgz ______________________________________________________________________________ You can find updates on our ftp-Server: ftp://ftp.suse.com/pub/suse/i386/update for Intel processors ftp://ftp.suse.com/pub/suse/axp/update for Alpha processors or this special update at: http://www.suse.de/de/produkte/susesoft/imas/imasupd/secfix.tgz or try the following web pages for a list of mirrors: http://www.suse.de/ftp.html http://www.suse.com/ftp_new.html Our webpage for patches: http://www.suse.de/patches/index.html Our webpage for security announcements: http://www.suse.de/security If you want to report vulnerabilities, please contact security(a)suse.de ______________________________________________________________________________ SuSE has got two free security mailing list services to which any interested party may subscribe: suse-security(a)suse.com - moderated and for general/linux/SuSE security discussions. All SuSE security announcements are sent to this list. suse-security-announce(a)suse.com - SuSE's announce-only mailing list. Only SuSE's security annoucements are sent to this list. To subscribe to the list, send a message to: <suse-security-subscribe(a)suse.com> To remove your address from the list, send a message to: <suse-security-unsubscribe(a)suse.com> Send mail to the following for info and FAQ for this list: <suse-security-info(a)suse.com> <suse-security-faq(a)suse.com> _____________________________________________________________________________ This information is provided freely to everyone interested and may be redistributed provided that it is not altered in any way. Type Bits/KeyID Date User ID pub 2048/3D25D3D9 1999/03/06 SuSE Security Team <security(a)suse.de> - ------BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.3i mQENAzbhLQQAAAEIAKAkXHe0lWRBXLpn38hMHy03F0I4Sszmoc8aaKJrhfhyMlOA BqvklPLE2f9UrI4Xc860gH79ZREwAgPt0pi6+SleNFLNcNFAuuHMLQOOsaMFatbz JR9i4m/lf6q929YROu5zB48rBAlcfTm+IBbijaEdnqpwGib45wE/Cfy6FAttBHQh 1Kp+r/jPbf1mYAvljUfHKuvbg8t2EIQz/5yGp+n5trn9pElfQO2cRBq8LFpf1l+U P7EKjFmlOq+Gs/fF98/dP3DfniSd78LQPq5vp8RL8nr/o2i7jkAQ33m4f1wOBWd+ cZovrKXYlXiR+Bf7m2hpZo+/sAzhd7LmAD0l09kABRG0JVN1U0UgU2VjdXJpdHkg VGVhbSA8c2VjdXJpdHlAc3VzZS5kZT6JARUDBRA24S1H5Fiyh7HKPEUBAVcOB/9b yHYji1/+4Xc2GhvXK0FSJN0MGgeXgW47yxDL7gmR4mNgjlIOUHZj0PEpVjWepOJ7 tQS3L9oP6cpj1Fj/XxuLbkp5VCQ61hpt54coQAvYrnT9rtWEGN+xmwejT1WmYmDJ xG+EGBXKr+XP69oIUl1E2JO3rXeklulgjqRKos4cdXKgyjWZ7CP9V9daRXDtje63 Om8gwSdU/nCvhdRIWp/Vwbf7Ia8iZr9OJ5YuQl0DBG4qmGDDrvImgPAFkYFzwlqo choXFQ9y0YVCV41DnR+GYhwl2qBd81T8aXhihEGPIgaw3g8gd8B5o6mPVgl+nJqI BkEYGBusiag2pS6qwznZiQEVAwUQNuEtBHey5gA9JdPZAQFtOAf+KVh939b0J94u v/kpg4xs1LthlhquhbHcKNoVTNspugiC3qMPyvSX4XcBr2PC0cVkS4Z9PY9iCfT+ x9WM96g39dAF+le2CCx7XISk9XXJ4ApEy5g4AuK7NYgAJd39PPbERgWnxjxir9g0 Ix30dS30bW39D+3NPU5Ho9TD/B7UDFvYT5AWHl3MGwo3a1RhTs6sfgL7yQ3U+mvq MkTExZb5mfN1FeaYKMopoI4VpzNVeGxQWIz67VjJHVyUlF20ekOz4kWVgsxkc8G2 saqZd6yv2EwqYTi8BDAduweP33KrQc4KDDommQNDOXxaKOeCoESIdM4p7Esdjq1o L0oixF12Cg== =pIeS - ------END PGP PUBLIC KEY BLOCK----- -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv iQEVAwUBOM/tAney5gA9JdPZAQGcGgf+MLJKh9b/0INnZNAEJqHhtcJa4BI48iaE zrK6gDpGp85ZP2vvWieueXcPnUgN+GmgmI1TNynEMf2vJqojz28i8VsDxdHHKY81 rr/eIAyMkS3IXaXi9ROqfH0oVMD1rtRHtbce4akyJAKNHKo3pLM1ZNIhVygb8xkK LBM9QgsOq1VGB17A8ySXLuAJfVmOioVPkoE8JbCokJHnWk4nMZElVzuJyqSVvRvl b4T8wL5Qf/Ys8QoW0y4/eXe/7akuUIxw4ue9AcZIRBgRM1PbO8neUzE8EE/e4zoJ SKpA25AVWmTw4SAUdvd4tfBRetCXQOZq2VkcyEGjxm/rhC58/456VQ== =J/mX -----END PGP SIGNATURE-----

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Why did SuSE pass this one up?!!
by Fred A. Miller 14 Mar '00

14 Mar '00

Linux Platforms to Add Tripwire Three suppliers of Linux operating systems plan to add Tripwire intrusion detection and prevention software to boost security. http://www.techweb.com/wire/story/TWB20000302S0022 http://www.zdnet.com/zdnn/stories/news/0,4586,2453339,00.html -- ----/ / _ Fred A. Miller ---/ / (_)__ __ ____ __ Systems Administrator --/ /__/ / _ \/ // /\ \/ / Cornell Univ. Press Services -/____/_/_//_/\_,_/ /_/\_\ fm(a)cupserv.org

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Firewall 2.0: Samba services
by Daniel Mehrmann 13 Mar '00

13 Mar '00

Hello, With Firewall 1.4 and 2.0 i have a problem: The SuSE Firewall blocking all SAMBA pakets from my internal network :-(( My system has 5 Networkcards. All pakets from my local networks, e.g. 192.168.1.0:138 -> 192.168.2.0:138, will be blocked :-(( When comes a bugfix ? greetings daniel

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Re: [suse-security] Strange kernel message
by Jan Hildebrandt 13 Mar '00

13 Mar '00

> Hello Jan, > > Jan Hildebrandt writes: > > This is probably not directly security related and might be > > off-topic - but today I discovered a strenge kernel message in > > /var/log/messages of our central file server running SuSE Linux 6.2: > > > > Mar 10 12:01:23 xxx kernel: eth0: Something Wicked happened! 000a. [...] > > I had the same effect with several ethernet cards with VIA VT3043 > Rhine chips. I think it is a driver problem. > After this Kernel-Message there goes nothing over that interface. Thanks for the info - uhm, we would have noticed if the NIC had been down after that kernel message - it's our central server as I said ;-) We have no problem with the network traffic itself - no packet loss at all (thank goodness...). So it seems to be a problem with the driver module, no security issue - and as long as the server continues to serve our data I won't have to worry. Jan -- jan.hildebrandt(a)mathema.de MATHEMA Software GmbH (http://www.mathema.de) Nägelsbachstraße 25a D-91052 Erlangen, Germany Tel: (+49)9131/8903-0 Fax: (+49)9131/8903-55

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Strange kernel message
by Jan Hildebrandt 13 Mar '00

13 Mar '00

This is probably not directly security related and might be off-topic - but today I discovered a strenge kernel message in /var/log/messages of our central file server running SuSE Linux 6.2: Mar 10 12:01:23 xxx kernel: eth0: Something Wicked happened! 000a. There have been logged several such messages (000a as well as 0009, 000b) during the last days. It's a 10/100 NIC running with the via-rhine module: Feb 27 17:03:19 xxx kernel: eth0: VIA VT3043 Rhine at 0xb800, 00:40:05:a5:2f:54, IRQ 10. Feb 27 17:03:19 xxx kernel: eth0: MII PHY found at address 8, status 0x782d advertising 05e1 Link 40a1. I'm a little worried now (maybe I'm just paranoid ;-)) - can someone of you tell me what this message means? Thanks in advance, Jan Hildebrandt -- jan.hildebrandt(a)mathema.de MATHEMA Software GmbH (http://www.mathema.de) Nägelsbachstraße 25a D-91052 Erlangen, Germany Tel: (+49)9131/8903-0 Fax: (+49)9131/8903-55

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Sendmail
by Leon van Heerden 12 Mar '00

12 Mar '00

Is there any securtiy reasons why frontpage extentions for apache has not been released as SuSE packages? If so , what are they ? Leon.

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firewall
by als 12 Mar '00

12 Mar '00

Hi , i installed Suse 6.3 with firewall 1.4. I want to permit the following access through the firewall: www, domain, ftp, smtp and ssh. Then i made some adjustments in "rc.firewall" like : FW_ROUTE="yes" FW_TCP_SERVICES_EXTERNAL="smtp www domain ftp" FW_UDP_SERVICES_EXTERNAL="domain smtp ftp" After starting of firewall i have full access from internal network to internet but there isn't any access from Internet and no mail.... Could someone tell me what should i do? Alireza

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openSUSE Security March 2000