July 2004 - openSUSE Security - openSUSE Mailing Lists

Getting public keys for signed mails automatically
by Juergen.Mell＠t-online.de 25 Jul '04

25 Jul '04

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi List, I have set up kmail to use OpenPGP for encripted and signed mails. When I get signed mails this works pretty well as long as the public key of the sender is in my key ring. If it is not I get a warning that the public key is not available. Of course I could now download the public key from a key server (provided that it is available on the server) and import it with kgpg but that's a long way to go. Is there any means to automate this process, eg. to downlad public keys which are not in the key ring when a mail is opened? Thanks for your help! Jürgen -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQFBAn9etMrl3JEeRvwRAlmmAJ9wasJzG5sxVgQwc178T8UF8BTNFwCeJ1xc 27vq++W4Zbv+Hss8+AYlDzU= =T4bm -----END PGP SIGNATURE-----

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Re: [suse-security] TEST - PLEASE IGNORE
by Jonathan Gardner 24 Jul '04

24 Jul '04

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Friday 23 July 2004 01:39 am, Marc Samendinger wrote: > On Wed, Jul 21, 2004 at 01:50:48PM -0700, Jonathan Gardner wrote: > > Hi Jonathan, hi suse-security-owner > > > On Wednesday 21 July 2004 01:38 pm, Jonathan Gardner wrote: > > > I've heard that someone or something (maybe us!) are harvesting email > > > addresses on this list and sending email to them from our legitimate > > > servers. (See http://spf.pobox.com and try host -t txt amazon.com) > > > > > > I'm hoping they'll bite and send me one as well. > > > > It bit, and the problem is being solved. Thanks for your cooperation > > and understanding. > > Looks like the problem is not resolved yet, I just got another mail from > amazon.co.uk. > Complete mail attached. > Yes, I've asked the suse-security-owner to just go ahead and remove any addresses with amazon in the domain. As long as a notice is sent out, those that are still reading the list will get a chance to resubscribe. The other option is to send me a list of those addresses and I will review them, and tell the owner which ones to remove. I haven't received a response yet. - -- Jonathan M. Gardner Mass Mail Systems Developer, Amazon.com jonagard(a)amazon.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (GNU/Linux) iD8DBQFBATpfBFeYcclU5Q0RAu1iAJ4/NGy44v2nGVi6+S8a7A2k+PFZYACcDDeX FYaX3+Zx+aHJLyXknzL1uTg= =ZThm -----END PGP SIGNATURE-----

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Cracking passwd "linux" with John (JTR) took 1hr
by Al Bogner 24 Jul '04

24 Jul '04

I try to find out how secure my passwords are and tried the following: I created a file passwd.1 with the following content: test: $2a$05$CL3uN2mrTaP6zoDNubQsEuFhxIB0K4bIylcm5yuP5LTY8nZ3HJ4MO:1002:100:te st:/home/test:/bin/bash Then I used john from SuSE 9.1-DVD: john -users:test -session:testcrack passwd.1 Loaded 1 password hash (OpenBSD Blowfish [32/32]) linux (test) guesses: 1 time: 0:01:11:27 (3) c/s: 333 trying: linux Why does it take so long to crack a simple passwd like "linux", while the password test1 was found immediately? I used a XP 2700+ with the following bechmarks: john -test Benchmarking: Traditional DES [24/32 4K]... DONE Many salts: 223578 c/s real, 232391 c/s virtual Only one salt: 214406 c/s real, 218773 c/s virtual Benchmarking: BSDI DES (x725) [24/32 4K]... DONE Many salts: 8009 c/s real, 8139 c/s virtual Only one salt: 7924 c/s real, 8053 c/s virtual Benchmarking: FreeBSD MD5 [32/32]... DONE Raw: 5999 c/s real, 6262 c/s virtual Benchmarking: OpenBSD Blowfish (x32) [32/32]... DONE Raw: 362 c/s real, 370 c/s virtual Benchmarking: Kerberos AFS DES [24/32 4K]... DONE Short: 213350 c/s real, 215941 c/s virtual Long: 593561 c/s real, 595945 c/s virtual Benchmarking: NT LM DES [32/32 BS]... DONE Raw: 3056787 c/s real, 3062913 c/s virtual Al

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AW: [suse-security] Limit Browser-Type
by Rasp, Robert 24 Jul '04

24 Jul '04

Hello, thanks to all :-) This was very helpful. CU Robert Rasp -----Ursprüngliche Nachricht----- Von: Philippe Vogel [mailto:filiaap@freenet.de] Gesendet: Freitag, 23. Juli 2004 17:05 An: suse-security(a)suse.com Betreff: Re: [suse-security] Limit Browser-Type Markus Gaugusch wrote: > On Jul 22, Rasp, Robert <Rob(a)killrob.de> wrote: > >> is it possible to limit the Browser-Type witch has INET-Access? >> I use SQUID and SQUIDGUARD. > > Just look at my homepage, http://gaugusch.at/squid.shtml > > I'm describing the process that my company did. We switched from IE to > Firefox and blocked inet access to IE via our squid proxy. > > Markus Nice :-) We used a logon-script after installing firefox and changed access-rights to the IE-executable to be accessible for group admin only. Philippe -- Check the headers for your unsubscription address For additional commands, e-mail: suse-security-help(a)suse.com Security-related bug reports go to security(a)suse.de, not here

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Limit Browser-Type
by Rasp, Robert 23 Jul '04

23 Jul '04

Hello, is it possible to limit the Browser-Type witch has INET-Access? I use SQUID and SQUIDGUARD. Thanks for the Help Robert Rasp

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Problem with Windows Network Neighborhood and Linux
by remote 23 Jul '04

23 Jul '04

Hi ! I run a small heterogeneous network of Linux boxes and Windows computer with a SuSE 8 Pro box which serves as central gateway, DNS and mail server and firewall. For a few days now, I have noticed that my users had trouble using the Windows Network Neighborhood. It would not show which other machines were available. The situation deteriorated until now, I get an error message saying that I cannot access the Neighborhood at all. The funny thing is, if I use Windows to search for a specific computer, it will find it and I can access the computer´s shared directories. I used my Linux gateway to check the other machines, they are physically available, they can be pinged and the DNS name resolution works fine. My other Linux boxes don´t seem to have any problems at all. Also, neither the Windows machines nor the Linux boxes have trouble with other network applications like mail or internet access. There have been no major hardware or configuration changes for several weeks now, thus I am sure this is no hardware problem but instead network-related. Any suggestions what my problem might be and how to solve it ? Thanks, Jörg

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SUSE Security Announcement: samba (SUSE-SA:2004:022)
by Thomas Biege 23 Jul '04

23 Jul '04

-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SUSE Security Announcement Package: samba Announcement-ID: SUSE-SA:2004:022 Date: Friday, Jul 23th 2004 12:30 MEST Affected products: 8.1, 8.2, 9.0, 9.1 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 root compromise Severity (1-10): 7 SUSE default package: no Cross References: CAN-2004-0600 CAN-2004-0686 Content of this advisory: 1) security vulnerability resolved: - buffer overflow in base64 code - buffer overflow in "mangling method hash" code problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds: - cadaver - kopete - wv - gnats - OpenOffice_org - mod_ssl - lha 3) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion, solution, upgrade information The Samba Web Administration Tool (SWAT) was found vulnerable to a buffer overflow in its base64 code. This buffer overflow can possibly be exploited remotely before any authentication took place to execute arbitrary code. The same piece of vulnerable code was also used in ldapsam passdb and in the ntlm_auth tool. This vulnerability only exists on Samba 3.0.2 to 3.0.4. Another buffer overflow was found in Samba 3.0.0 and later, as well as in Samba 2.2.x. This overflow exists in the hash code of the mangling method (smb.conf: mangling method = hash), the default uses hash2 which is not vulnerable. There is no temporary workaround known. The first proof-of-concept exploits were seen on public mailing lists. After the installation was successfully completed please restart the samba daemon. /usr/sbin/rcsmb restart SWAT is called by inetd/xinetd. Therefore it is sufficient to kill all running instances of SWAT only. 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. Note that SLES8 packages will be delivered with a short delay. x86 Platform: SUSE Linux 9.1: ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-3.0.4-1.27.i586.… eb8a66582bfa5749457ac18d518321ef ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-client-3.0.4-1.2… d38d71df7e69ede72ae70f1e763ee688 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-pdb-3.0.4-1.27.i… 9d95db6023323752e1705147c3a0609a ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-python-3.0.4-1.2… dfd2c9883cfdbefc27d8a6d555d483df ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-vscan-0.3.4-83.3… 117af75e8fb9d8a941a88680f813f7ba ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-winbind-3.0.4-1.… a589036769807de0fc0aa5bab67010f4 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-doc-3.0.4-1.12.i… c5ef1760451cc548082ad6dad990e971 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/libsmbclient-3.0.4-1.2… 2ea69766d732ca3393a3a49256550315 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/libsmbclient-devel-3.0… 6c03f36007f9172ec2c51b18796b7fed patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-3.0.4-1.27.i586.… 1d4b5402e5c4d86c6da563176e4c08fb ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-client-3.0.4-1.2… 71a324e5651388fc8386abd3ac7390e8 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-pdb-3.0.4-1.27.i… 37bb872de17d6553cd4b3953339fff57 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-python-3.0.4-1.2… 7e3f654697615788d6ec4a8b7befb409 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-vscan-0.3.4-83.3… 4fe8afef0d7a6423e9d75059f5c3a39c ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-winbind-3.0.4-1.… 5fdd07f3ed51f1445ae9627d27288ad5 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/samba-doc-3.0.4-1.12.i… a68c8621757af909d2b94e850be7de91 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/libsmbclient-3.0.4-1.2… 3ccb1c15d3a92e3addce0006fc5f36aa ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/libsmbclient-devel-3.0… f5611c3f3205bb71bb18c7aa9d89e147 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/samba-3.0.4-1.27.src.rpm 28ddb7350c6d00554cbbfee069508bfa ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/samba-3.0.4-1.27.src.rpm 28ddb7350c6d00554cbbfee069508bfa SUSE Linux 9.0: ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/samba-2.2.8a-220.i586.… 9ac0a1d443e21b690fa44efdf4fbfe26 ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/samba-client-2.2.8a-22… d06b6b598b068b32c5b8e53deba35781 ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/libsmbclient-2.2.8a-22… ee96bf9888505c733c2125d0c82bc6ab ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/libsmbclient-devel-2.2… d058f19c7d39a7cbad2a9e7802e18321 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/samba-2.2.8a-220.i586.… aec244915e9904e7ab768fc2a7f42678 ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/samba-client-2.2.8a-22… 975a1aa4730932384d1f714de1d97f0d ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/libsmbclient-2.2.8a-22… 83372f5221e4d87b442896d18cb13cfb ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/libsmbclient-devel-2.2… 01173f42d4c553060a3bd34e868b6036 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/samba-2.2.8a-220.src.rpm 1c593a5d8773adaf5bced92c448b1d28 SUSE Linux 8.2: ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/samba-2.2.8a-220.i586.… be58f82e80dadb267c2a4825f4595f78 ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/samba-client-2.2.8a-22… e8b0f39bc5399c47604e85fe4c5afaa8 ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/samba-vscan-0.3.2a-273… 6bceb4400311c62ba0ee3c67c307c995 ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/samba-doc-2.2.8a-220.i… 75f7435be45346ec464ac601928ef5ec ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/libsmbclient-2.2.8a-22… 25e6c997abb4d1f553d65f28c755bdd6 ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/libsmbclient-devel-2.2… 51db02193556b2e0f656ae3eab6e6d2c patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/samba-2.2.8a-220.i586.… 36c9f4bf87e8c24f383243b6afa60a78 ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/samba-client-2.2.8a-22… dae51ec83ebb8c4561f093275693cddd ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/samba-vscan-0.3.2a-273… 65e4ec644fcaa6dae0e0a6eb45bd3b32 ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/samba-doc-2.2.8a-220.i… b7afa9c1ce7c738e5713ecb099997c60 ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/libsmbclient-2.2.8a-22… 9012184f0134752e93304f446f66b58b ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/libsmbclient-devel-2.2… b3c54af825c8493477228a148e980fbb source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/samba-2.2.8a-220.src.rpm d4191930b031916da317826c97ed2d1f SUSE Linux 8.1: ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/samba-2.2.8a-218.i586.… bd05222b4bfb4e5f9b74d698193308b4 ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/samba-client-2.2.8a-21… 995a14fc6c056b6fd0f058e2998e3662 ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/samba-vscan-0.3.2a-271… 06f2b11f510feabd03a5f12011123434 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/samba-2.2.8a-218.i586.… 440f99b6f31364338f193f19d9ffa11c ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/samba-client-2.2.8a-21… e7f3e019310b89e9d886566eb1883015 ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/samba-vscan-0.3.2a-271… 9bdff15af5aa1bcbd8b3f3f7bc0ca3da source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/samba-2.2.8a-218.src.rpm 220a7c6d6321e3084a2aff660b6d0676 x86-64 Platform: SUSE Linux 9.1: ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-3.0.4-1.27.x… 1213320f05fe517f6ba04bc42d50709f ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-client-3.0.4… 5a82823e6084bb0a34f49ffb65a42cd0 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-pdb-3.0.4-1.… ab4eff578e923f7669117906e8b9746b ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-python-3.0.4… 5bbc5dadc8fe63fd6425eff47f8106ef ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-vscan-0.3.4-… 48430a71429570acc9b548aecd934231 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-winbind-3.0.… 6f392d6e316270195f378e6e2c9d985a ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-doc-3.0.4-1.… 1c1fd503a6647971062242e5331b3a40 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/libsmbclient-3.0.4… 3ea19bb5407aad016a81a1c58959a3f5 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/libsmbclient-devel… f29abe0a058b7ac5bf279c58da1786e9 patch rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-3.0.4-1.27.x… b2411efa394e95aaf7f99f24bfa49df4 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-client-3.0.4… d0f46d9895ed6e832eb084e27861e46b ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-pdb-3.0.4-1.… 772f3ee4c84c1f3a56ec8de8d84f0f9b ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-python-3.0.4… 24cf637c5d4e457ccf9e9f0c7310aaa2 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-vscan-0.3.4-… 3fc53fd5832e1dcc27cd94ac71f3326a ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-winbind-3.0.… 90d8eabb5627bf35926c14efbe38715c ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/samba-doc-3.0.4-1.… 604605a86c494ad75e36d726f5338e92 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/libsmbclient-3.0.4… a9fc6862320d1a5779bfdb579940aecc ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/libsmbclient-devel… e26969f5d5825783b9f3772c57130658 source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/samba-3.0.4-1.27.src.… ae515af0053f16915ec17a7603f8ea4f ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/samba-3.0.4-1.27.src.… ae515af0053f16915ec17a7603f8ea4f SUSE Linux 9.0: ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/samba-2.2.8a-220.x… 45d16bdb83a27119aa9214c47436c363 ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/samba-client-2.2.8… 488e2f2062d0a26188af0d4344090ce5 ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/libsmbclient-2.2.8… b71dd13a2eaa7e2e739051c1b3d46660 ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/libsmbclient-devel… 2c2d87093a5133ba06a16b951d7cdbee patch rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/samba-2.2.8a-220.x… b97f915e2e5d0a36ee158ea904a9afb2 ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/samba-client-2.2.8… 2c991a6b08e0d4a3e7a08df2674b6bdf ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/libsmbclient-2.2.8… 652aacdf4f9924fa116ecd6ba0be82b4 ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/libsmbclient-devel… 0187cf267440e0ae59cf6470506b8aff source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/samba-2.2.8a-220.src.… 3e8959024074f53e6af4f2d5db5799c4 ______________________________________________________________________________ 2) Pending vulnerabilities in SUSE Distributions and Workarounds: - cadaver The cadaver package includes a vulnerable version of the neon library (CAN-2004-0179, CAN-2004-0398). New packages are available on our FTP servers. - kopete This update fix' a security issue in the winpopup protocol. It was possible to overwrite files via a symlink attack. New packages are available on our FTP servers. - wv This update resolves the insecure handling of temporary files. New packages are available on our FTP servers. - gnats A format string bug in gnats has been fixed that possibly allows remote command execution. New packages are available on our FTP servers. - OpenOffice_org OpenOffice_org uses a vulnerable version of libneon (CAN-2004-0179, CAN-2004-0398, missing filtering of control chars). Note that this update is marked "optional" and not "security" because of the size of the package. New packages are available on our FTP servers. - mod_ssl A remotely exploitable format string bug has been found in the logging function of mod_ssl. New packages will be available soon. - lha A source code review of lha was conducted by the SuSE Security-Team to fix all possible buffer overflows. 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. 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Re: [suse-security] Email Spoofing
by Marc Samendinger 23 Jul '04

23 Jul '04

> -----Original Message----- > From: Alan Hadsell [mailto:ahadsell@MtDiablo.com] > Sent: Thursday, July 22, 2004 5:32 PM > > > > 1) You don't have the Received: headers until the SMTP handshake is > completed and the data is transferred. At that point in the > protocol, there is no way to reject the mail; the receiving MTA > has taken responsibility for it. Thats not quite true, while its only reasonable for low traffic sites, with postfix you have the posibility using a before-queue content filter http://www.postfix.org/SMTPD_PROXY_README.html With a before-queue content filter you could inspect the received lines and accept the mail if a spf trusted mail server ist found. I would not recommend this, I just wanted to say theres a technical way to do it :) marc

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Re: [suse-security] Re: Problem with Windows Network Neighborhood and Linux
by Kris Hoelzer 23 Jul '04

23 Jul '04

Hello Joerg, > Windows used my Linux-based DNS to do name resolution (which works fine, > btw). So, what exactly is a Master Browser and how do I find out which > of my > machines is it ? Is there a Windows-Servers acting as PDC (primary doamin controller) in your network available ? Instead you samba-running linux box played that role, maybe .. ? The master browser is this machine which "scans" the network for win-boxes -- to explained it very simply. Please don't wrap together windows-name-resolution and (your Linux) DNS. Windows use WINS as default and can be configured only to use DNS as backup. > nbtstat -r yields only a few of my machines. This exactly shows your problem which your WINS Try to check if all Win-Boxes are set to use you linux box as "master browser" Star with the autoupdated XPs fist ;o) HTH Kris

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openvpn and SuSEfirewall
by Kaiser, Hans 23 Jul '04

23 Jul '04

Hallo list, I'm using openvpn and SuSEfirewall. Oenvpn is running fine, but my routing won't work. My local network (eth0) is 192.168.1.0/24 My tunnel net (tun1) is 192.168.2.0/24 So I'm trying to route the both nets, but I get for every protocol from the SuSEfirewall: SFW2-FWDint-DROP-DEFLT IN=tun1 OUT=eth0 SRC=192.168.2.1 DST=192.168.1.250 LEN=84 TOS=0x00 PREC=0x00 TTL=63 ID=2 DF PROTO=ICMP TYPE=8 CODE=0 ID=2365 SEQ=3 Any Ideas, what is wrong? My SuSEfirewall config: My SuSEfirewall: FW_QUICKMODE="no" FW_DEV_EXT="ppp0" FW_DEV_INT="eth0 tun1" FW_DEV_DMZ="" FW_ROUTE="yes" FW_MASQUERADE="yes" FW_MASQ_DEV="$FW_DEV_EXT" FW_MASQ_NETS="0/0" FW_PROTECT_FROM_INTERNAL="no" FW_AUTOPROTECT_SERVICES="yes" FW_SERVICES_EXT_TCP="8890:8893 http https ssh" FW_SERVICES_EXT_UDP="isakmp" FW_SERVICES_EXT_IP="" FW_SERVICES_EXT_RPC="" FW_SERVICES_DMZ_TCP="" FW_SERVICES_DMZ_UDP="" FW_SERVICES_DMZ_IP="" FW_SERVICES_DMZ_RPC="" FW_SERVICES_INT_TCP="" FW_SERVICES_INT_UDP="" FW_SERVICES_INT_IP="esp" FW_SERVICES_INT_RPC="" FW_SERVICES_QUICK_TCP="" FW_SERVICES_QUICK_UDP="" FW_SERVICES_QUICK_IP="" FW_TRUSTED_NETS="192.168.1.0/24 192.168.2.0/24" FW_ALLOW_INCOMING_HIGHPORTS_TCP="no" FW_ALLOW_INCOMING_HIGHPORTS_UDP="DNS" FW_SERVICE_AUTODETECT="yes" FW_SERVICE_DNS="no" FW_SERVICE_DHCLIENT="no" FW_SERVICE_DHCPD="yes" FW_SERVICE_SQUID="no" FW_SERVICE_SAMBA="yes" FW_FORWARD="" FW_FORWARD_MASQ="" FW_REDIRECT="" FW_LOG_DROP_CRIT="yes" FW_LOG_DROP_ALL="no" FW_LOG_ACCEPT_CRIT="yes" FW_LOG_ACCEPT_ALL="no" FW_KERNEL_SECURITY="yes" FW_ANTISPOOF="no" FW_STOP_KEEP_ROUTING_STATE="no" FW_ALLOW_PING_FW="yes" FW_ALLOW_PING_DMZ="no" FW_ALLOW_PING_EXT="no" FW_ALLOW_FW_TRACEROUTE="yes" FW_ALLOW_FW_SOURCEQUENCH="yes" FW_ALLOW_FW_BROADCAST="int" FW_IGNORE_FW_BROADCAST="no" FW_ALLOW_CLASS_ROUTING="no" FW_CUSTOMRULES="" FW_REJECT="no" FW_HTB_TUNE_DEV="ppp0,125" FW_IPv6="" FW_IPv6_REJECT_OUTGOING="yes" FW_IPSEC_TRUST="int" FW_IPSEC_MARK="" FW_LOG="" My SuSEfirewall-custom: fw_custom_before_masq() { iptables -A INPUT -i tun+ -j ACCEPT iptables -A FORWARD -i tun+ -j ACCEPT iptables -A INPUT -i tap+ -j ACCEPT iptables -A FORWARD -i tap+ -j ACCEPT true } Best regards, Hans

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