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Another DNS Flaw Found, Patched 66

Posted by Soulskill
from the come-and-gone dept.
darthcamaro writes "Remember the big DNS flaw that Dan Kaminsky 'discovered' last year? Well, it looks like another flaw in DNS has just been patched. This time it's an item that affects DNSSEC, which was supposed to be the savior for the Kaminsky flaw. The good news, though, is that this time, the issue is relatively minor and DNS has already been patched. 'The flaw is specific to certain usages of DNSSEC,' Joao Damas, senior programming manager of the ISC told InternetNews. 'It is strongly advised that all BIND DNSSEC deployments update in case they are using the particular pattern affected (DSA keys in some cases) and to prevent coming across the problem in the future unexpectedly.'"
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Another DNS Flaw Found, Patched

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  • by LingNoi (1066278) on Friday January 09, 2009 @08:33PM (#26394271)

    Is this somehow related to the bind DNS updates for ubuntu desktop that got pushed yesterday?

    • Re: (Score:3, Informative)

      by WarJolt (990309)

      Your home ubuntu machine or windows machine won't be effected directly by this.

      • by Sir_Lewk (967686)
        Even if we are running a DNS server on one of them?
        • Otherwise not a problem.

          • Re: (Score:1, Offtopic)

            by hairyfeet (841228)
            Slightly OT, but since it is a DNS question and I have NO freaking clue where else to ask this, here goes. Does anyone know of a good easy to set up and use DNS server for Win2K Pro? I have been using Treewalk [ntcanuck.com], which is nice, easy to maintain and low resource, but with it not having been updated since '05 and all these DNS hacks coming out I think it might be time to switch. Any ideas on what would make a good, preferably low resource replacement?
            • I no longer do proprietaryware, so this isn't from personal experience. Point one is second hand and point two is based on the docs. Be kind to me mods, I did turn the karma bonus off and I am being transparent on the authority level.

              1) Doesn't "Pro" at least come with a DNS server of some sort? I was under the impression... or maybe you don't trust it (you won't get any argument from me there, altho 2K was still respectable as it didn't yet have the eXPrivacy thing that was what ultimately gave me the f

              • by hairyfeet (841228)

                Win2K Pro doesn't come with any DNS, and trying to compile using GCC on Win2K Pro is about as fun as getting hit in the nuts repeatedly with a ball peen hammer. Linux and Windows just don't play nice with each other, at least not for me. And all my gear doesn't work in Linux. The board has funky proprietary chips, the all in one printer won't even print, and the router won't talk to anything but IE for configuration. So switching to Linux is pretty much out. I need something I can fire up and walk away from

                • > And all my gear doesn't work in Linux.

                  Been there. =:^(

                  Luckily, about time W98 (which I was in line for at midnight, after running the IE4 betas and installing IE4 with desktop enhancements on W95) came out, I started playing around with Linux, and soon began to require that any hardware I bought was Linux compatible, so by the time MS gave me that final shove when they decided eXPrivacy was going to require authentication, I had been buying all Linux compatible hardware for a couple years and was fine

                  • by hairyfeet (841228)

                    Sigh.....that must really be nice to be able to do that. In the past 5 years I have spent exactly $0.00 for my PC gear. With a paraplegic sister and a half blind mom who had to quit working to take care of sis I just don't have it. Every dime that I make at the shop ends up going to them or my boys. So I have adapted and became a "scrap rat" to keep myself in gear.

                    A customer will come in and say "I hate this thing, it is too slow! Can you get my stuff off and get me a faster one?" or "This thing is broken!

                    • Well... if you look at my posting history, you'll note that I learned the hard way to actively prioritize things in my life, and then actively go after what I have prioritized.

                      In a way, you're lucky, in that you have family you value highly enough to make that sacrifice for. You mention both upstream and downstream family. I don't have any downstream family. I do have upstream, but while I love 'em, let's just say we get along better if there's a bit of distance between us. So I have no family to spend

                    • My computer is 8 years old AMD 1.4ghz - and yes, when I bought it, I checked the compatibility.
                      It would be interesting if you posted the actual hardware you are having issues with.
                      The problems may have been resolved.
                      An out of the box linux has far better HW compatibility these days than Windows.
                      The windows advantage is the manufacturers actually make sure the equipment has the drivers when they sell it to you.
                      If you build on your own, which, if you are as poor as you say, you should, you can trivially ensur

                    • by hairyfeet (841228)

                      I guess you didn't really read my post. i don't actually BUY hardly anything. I swap the machine off of a customer and then scavenge the pieces I need. So there isn't any "shopping for compatibility" there. As for the gear, well besides the Windows programs I use for work, There is an HP Pavilion with a funky as hell audio chipset(not realtek, that would be easy. Maybe an old Ali? I've not busted it open in awhile) along with a Trendnet router that only works with IE for configuration and a Lexmark x1270 al

            • qemu.exe -hda debian.qcow -redir udp:53::53 -snapshot -vnc 3

              then you can run whatever DNS server you like (not necessarily Linux - Plan 9's DNS server doesn't suffer the sequence number guessing problem). Use snapshot once it's set up so that you can just switch off without worrying about syncing its fs, (or use the console to apply fs changes while in snapshot mode). Or use samba to attach to the Host FS and use that, or use AOE (though I've only tried that the other way round with Linux as the host).

              Ironi

  • subject (Score:5, Funny)

    by cstdenis (1118589) on Friday January 09, 2009 @08:47PM (#26394395)

    This is bad for all those who use DNSSEC. Both of them must be annoyed at the need to their software.

  • by mrsbrisby (60242) on Friday January 09, 2009 @08:53PM (#26394451) Homepage

    I don't have anything to add to my subject.

  • Yeah, um... (Score:5, Informative)

    by Ethanol (176321) on Friday January 09, 2009 @09:24PM (#26394691)

    That's not a "DNS flaw".

    It's an OpenSSL bug that turned out to affect BIND.

    • Re: (Score:2, Funny)

      by Anonymous Coward

      Since the Windows resolver can connect to BIND, and Microsoft didn't release a patch, a well-written Slashdot summary should have read

      Microsoft refuses to fix critical Windows 7 security vulnerability.

    • Re:Yeah, um... (Score:5, Informative)

      by Florian Weimer (88405) <fw@deneb.enyo.de> on Saturday January 10, 2009 @04:27AM (#26396673) Homepage

      It's an OpenSSL bug that turned out to affect BIND.

      No, it's a misuse of an OpenSSL API from within BIND, so the error is on BIND's side. It's of extremely low impact, though.

      • Exactly. I was just on the ISC site checking out something else (someone was asking about DNS for MS W2K and I was checking on that), and they said return codes for openSSL function calls weren't being checked in a few places so a verify failure may not have been properly caught. The released patch and downstream updates fix that.

  • time to dump BIND (Score:2, Informative)

    by hansoloaf (668609)
    and go wtih djbdns
    • by abigor (540274)

      Make that PowerDNS, and I agree. BIND is a flaming sack of dog shit, and the conflation of DNS with BIND in many people's minds drives me nuts.

    • Re: (Score:2, Interesting)

      Personally, I use ldapdns [nimh.org], which used to be based on the djbdns code and continues to adopt some ideas from djbdns, The nice thing about ldapdns, though, is that the database store is entirely in LDAP. You change it in LDAP and the changes in the DNS server are instantaneous.

      I would consider PowerDNS as well, but ldapdns is also very small, fast and lightweight and it scales well. I don't get the feeling that PowerDNS is so lightweight.

      • Re: (Score:3, Informative)

        by abigor (540274)

        PowerDNS is actually quite light. They had the good sense to split it into a caching nameserver and a recursing resolver, making two lightweight daemons, rather than a single "does everything" process.

        It's also nice because it can suck in BIND zone files if you're stuck with them and don't want to migrate. Good commercial support is also available. The code itself is GPL.

    • by Morty (32057)

      It doesn't make sense to drop BIND in favor of djbdns just because of this. djbdns doesn't even try to do DNSSEC. The bug in BIND is not a direct attack on the DNS server, it just means that DNSSEC validation doesn't always work right. By switching from BIND to djbdns, you are completely breaking DNSSEC validation. In different terms, the worst consequence of this bug was that it sometimes made BIND act like djbdns.

  • DNS Flaw? (Score:5, Insightful)

    by HairyCanary (688865) on Friday January 09, 2009 @10:46PM (#26395175)

    "DNS Flaw"? Can we shoot for a bit more accuracy here on Slashdot, since we're all technical enough to understand the details? It's a flaw that affects BIND. And BIND != DNS. I shouldn't have to point that out...

  • > Remember the big DNS flaw that Dan Kaminsky 'discovered' last year?

    Why emphasize "discovered" in sarcastic quote marks? Did he NOT discover it? Was it someone else?

Murphy's Law, that brash proletarian restatement of Godel's Theorem. -- Thomas Pynchon, "Gravity's Rainbow"

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