Obsolete Cipher Suite Message
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@tonyshowoff said in Obsolete Cipher Suite Message:
@Dashrender said in Obsolete Cipher Suite Message:
In this case, SHA-1 has still not been short circuited from a hacking perspective so the risk is truly minimal.
It has, for a long time: https://www.schneier.com/blog/archives/2005/02/sha1_broken.html
I'll read this in a min, but if this is what i heard about, there's a possible collision in something like the first half, or quarter or something.. which is a work toward the whole.. but definitely not a finished product by any means.
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@tonyshowoff said in Obsolete Cipher Suite Message:
@Dashrender said in Obsolete Cipher Suite Message:
In this case, SHA-1 has still not been short circuited from a hacking perspective so the risk is truly minimal.
It has, for a long time: https://www.schneier.com/blog/archives/2005/02/sha1_broken.html
OK now I've read it.. interesting.. if this is really the case, then why isn't it getting more attention? And that was from 2005. Eleven years ago... this is borderline NSA/Snowden like stuff.
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@Dashrender said in Obsolete Cipher Suite Message:
@tonyshowoff said in Obsolete Cipher Suite Message:
@Dashrender said in Obsolete Cipher Suite Message:
In this case, SHA-1 has still not been short circuited from a hacking perspective so the risk is truly minimal.
It has, for a long time: https://www.schneier.com/blog/archives/2005/02/sha1_broken.html
OK now I've read it.. interesting.. if this is really the case, then why isn't it getting more attention? And that was from 2005. Eleven years ago... this is borderline NSA/Snowden like stuff.
Well, MD5 was defeated as early as 1996, and to this day it's huge, and only recently did SHA-1 replace it in many places. So it's about the same timeframe, Google's on the right track like you said.
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I don't think it is an SHA issue.
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@BRRABill said in Obsolete Cipher Suite Message:
I don't think it is an SHA issue.
Yes it is, especially because of how fast you can actually collide in SHA-1. Consider, though, MD5 support for certificates wasn't even broadly removed until about 17 years after it was first found to be weak, I think Google just wants to speed things up. Me personally, I think we should all use SHA-512 (a part of SHA-2), it's what I use for everything I can. 256 will do though
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Is HMAC-SHA1 the same as SHA1?
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@BRRABill No, and it's more secure than SHA-1, so long as the key is safe. The SHA1 part of HMAC-SHA1 refers to how it's calculated.
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@tonyshowoff said in Obsolete Cipher Suite Message:
@BRRABill No, and it's more secure than SHA-1, so long as the key is safe.
The reason I asked because https://www.microsoft.com (for example) is using HMAC-SHA1.
Hence why I said it isn't a SHA-1 issue causing this, at least on that site, and others.
Or am I mistaken there?
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@BRRABill said in Obsolete Cipher Suite Message:
@tonyshowoff said in Obsolete Cipher Suite Message:
@BRRABill No, and it's more secure than SHA-1, so long as the key is safe.
The reason I asked because https://www.microsoft.com (for example) is using HMAC-SHA1.
Hence why I said it isn't a SHA-1 issue causing this, at least on that site, and others.
Or am I mistaken there?
In this case there really is no difference as confusing as that is, but I don't see SHA-1 there, instead SHA-2 (256)
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@tonyshowoff said
In this case there really is no difference as confusing as that is, but I don't see SHA-1 there, instead SHA-2 (256)
This is what I am seeing...
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@BRRABill said in Obsolete Cipher Suite Message:
@tonyshowoff said
In this case there really is no difference as confusing as that is, but I don't see SHA-1 there, instead SHA-2 (256)
This is what I am seeing...
That's SHA-2 (TLS 1.2 uses this), message authentication is a different aspect of it, in the simplest terms, it's to avoid corrupt messages.
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So in my original post, what is Chrome having an issue with?
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@BRRABill said in Obsolete Cipher Suite Message:
So in my original post, what is Chrome having an issue with?
In TLS 1.2 if it's not using the ECDHE with GCM it is obsolete according to Chrome. If the signature, however, uses SHA-1, Chrome I don't even think will just accept it without going red or whatever. I think that's where some confusion comes from, the cipher of the protocol itself versus the signature of the certificate.
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So the net net here is that it is probably OK, but should be upgraded if possible?
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@BRRABill Yes
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Now THIS is the kind of chatter this thread deserved, LOL.