nanog mailing list archives
Re: MD5 considered harmful
From: Keegan Holley <keegan.holley () sungard com>
Date: Fri, 27 Jan 2012 18:35:00 -0500
2012/1/27 Jared Mauch <jared () puck nether net>:
On Jan 27, 2012, at 3:52 PM, Patrick W. Gilmore wrote:Your network, your decision. On my network, we do not do MD5. We do more traffic than anyone and have to be in the top 10 of total eBGP peering sessions on the planet. Guess how many times we've seen anyone even attempt this attack? If you guessed more than zero, guess again. I am fully well aware saying this in a public place means someone, probably many someones, will try it now just to prove me wrong. I still don't care. What does that tell you? STOP USING MD5 ON BGP.I would generally say: If you are on a p2p link or control the network, then yeah, you don't need md5. If you are at a shared medium (e.g.: IX) I do recommend it there, as it will help mitigate cases where someone can hijack your session by putting your IP/ASN whatnot on the router. The threat (Attack) never became real and we've now had enough time that even the slowest carriers are running fixed code. - Jared
I kind of agree that there isn't much of a vector here, but I don't agree that MD5 hurts if done correctly. Is it really that hard to find a semi-secure place to store passwords for an entire company? There's also the question of engineering standards. Is it an aging practice? Probably... Is it worth spending time to update it and train everyone not to use it? Probably not. I'll be happy when the world realizes that it's ok to let gig-e auto-negotiate. I've never really seen MD5 cause issues.
Current thread:
- MD5? Brian Stengel (Jan 27)
- Re: MD5? Seth Mattinen (Jan 27)
- Re: MD5? Christopher Morrow (Jan 27)
- Re: MD5? Jon Lewis (Jan 27)
- Re: MD5? Christopher Morrow (Jan 27)
- MD5 considered harmful Patrick W. Gilmore (Jan 27)
- Re: MD5 considered harmful Christopher Morrow (Jan 27)
- Re: MD5 considered harmful Grzegorz Janoszka (Jan 27)
- Re: MD5 considered harmful Jared Mauch (Jan 27)
- Re: MD5 considered harmful Keegan Holley (Jan 27)
- Re: MD5 considered harmful Jeff Wheeler (Jan 27)
- Re: MD5 considered harmful Keegan Holley (Jan 27)
- Re: MD5? Christopher Morrow (Jan 27)
- Re: MD5 considered harmful Zaid Ali (Jan 27)
- Re: MD5 considered harmful Patrick W. Gilmore (Jan 27)
- Re: MD5? Seth Mattinen (Jan 27)
- Re: MD5 considered harmful John Kristoff (Jan 30)
- Re: MD5 considered harmful Keegan Holley (Jan 30)
- Re: MD5 considered harmful harbor235 (Jan 31)
- Re: MD5 considered harmful David Barak (Jan 31)
- Re: MD5 considered harmful Nick Hilliard (Jan 31)
- Re: MD5 considered harmful harbor235 (Jan 31)