in reply to Re^7: 5.18.0 is available NOW!
in thread 5.18.0 is available NOW!

Two problems with that retort:

  1. It would be hard to code a patch to handle an attack vector that -- to the best of my ability to discover; and despite requests for further information and a promise of "I would release a full-disclosure document in the middle to last week of march." -- it seems has never been publicly described, let alone demonstrated.

    Indeed -- whilst I'm still waiting to hear back from mitre (CVE DB maintainers) and a couple of other likely organisations -- I can find no trace that anyone other than demerphq has ever been made party to the details of the vulnerability.

  2. Also, based upon the scant information I have been able to glean -- and a lot of unfortunately necessary supposition -- it seems likely that any one of several one-line patches might serve to totally mitigate the possibility of CVE-2013-1667.

    With the added upside that almost none of the pain caused by the implemented solution would have been necessary.

I'm preparing a paper -- which will probably come in 4 or 5 parts -- now. But it would surely be easier, and maybe even unnecessary, if disclosure were made.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

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Re^9: 5.18.0 is available NOW!
by demerphq (Chancellor) on May 22, 2013 at 10:13 UTC

    It turns out that vendors are slow in providing updates. We did a survey and there were too many vulnerable systems to release the details of the attack. Once we feel most of the affected systems are patched we will release more details. This process is called "responsible disclosure".

    Also, based upon the scant information I have been able to glean -- and a lot of unfortunately necessary supposition -- it seems likely that any one of several one-line patches might serve to totally mitigate the possibility of CVE-2013-1667.

    The patches mitigating CVE-2013-1667 are all public. The patches which changed Perls hash implementation are all public. The only code which is not public is the code which demonstrates a key-discovery attack on perls old hash function, and the key generator code to produce an attack key set for CVE-2013-1667.

    Please stop posting FUD about this issue. You do not know what you are talking about, and everybody reading this thread should know it.

    ---
    $world=~s/war/peace/g

[reply]
[d/l]
      This process is called "responsible disclosure".

      That can lead to "a feeling of false security."

      The patches mitigating CVE-2013-1667 are all public.

      The patches are public; but whether they actually address the perceived problem -- nor even if the perceived problem is actually a problem -- cannot be determined without knowing what the problem is.

      The only code which is not public is the code which demonstrates a key-discovery attack on perls old hash function,

      Easily reproduced with a 20 line script. It is running now:

      C:\test\ACA>acaorg.pl
ffffffff9e18a6c0 : 4239443806   ffffffff9e125b4a : 0
ffffffff6b7df080 : 1779721366   ffffffff6b70c590 : 0
fffffffe3ce11140 : 910530016    fffffffe3cdeeb65 : 0
fffffffe306bfb00 : 1611835061   fffffffe3068d669 : 0
fffffffe2433edc0 : 4138893306   fffffffe2424e54f : 0
fffffffd42101540 : 859828120    fffffffd4208b306 : 0
fffffffc946f3b00 : 3818104431   fffffffc946a41f9 : 0
fffffffc74d81280 : 136820829    fffffffc74cf4fda : 0
fffffffc5358a200 : 3579781500   fffffffc53498ab5 : 0
fffffffc3bfb3000 : 3954332110   fffffffc3bf13ea0 : 0
fffffffc1b0513c0 : 3628689861   fffffffc1afb954d : 0
fffffffbe2283140 : 2595609187   fffffffbe21d75fc : 0
fffffffa1f5df880 : 1843139145   fffffffa1f5da785 : 0
fffffff9aeb6dc00 : 1542994541   fffffff9aeb43499 : 0
fffffff37d875d40 : 32872931     fffffff37d805214 : 0
fffffff2906be6c0 : 185662415    fffffff29062e505 : 0
fffffff0ed75df80 : 2700779586   fffffff0ed6c3df9 : 0
ffffffebb2436680 : 3189906622   ffffffebb238e16e : 0
ffffffeba22b8700 : 1310410987   ffffffeba226ec28 : 0
ffffffeaead37e00 : 3625920016   ffffffeaead35785 : 0
ffffffeac9358900 : 2393602125   ffffffeac92fc165 : 0
ffffffeab111b9c0 : 369131293    ffffffeab102c84f : 0
ffffffea0f1f9880 : 2519556133   ffffffea0f1e03c3 : 0
ffffffe33550fc80 : 1663884228   ffffffe335462eab : 0
ffffffdf8e0f53c0 : 365009925    ffffffdf8e01ec78 : 0
ffffffdf8a10fd00 : 1643510682   ffffffdf8a05ef7c : 0
ffffffdf76d06640 : 4167007409   ffffffdf76cbc05d : 0
ffffffdf6ea5f200 : 708933268    ffffffdf6ea3d955 : 0
ffffffdf6a1e4700 : 259152129    ffffffdf6a17cd59 : 0
ffffffda20145dc0 : 1010735616   ffffffda200ecfa8 : 0
ffffffda01439280 : 3003550292   ffffffda01407fca : 0
ffffffd6ca1fb200 : 1340458493   ffffffd6ca13cba8 : 0
ffffffd6c6309d80 : 146205514    ffffffd6c62950ac : 0
ffffffd60de47080 : 2347657043   ffffffd60ddee3ea : 0
ffffffd49b178340 : 2926855563   ffffffd49b106f2e : 0
ffffffd452508800 : 4106455009   ffffffd4524c74e8 : 0
ffffffd2413442c0 : 1672645870   ffffffd24134317d : 0
ffffffd23dddc4c0 : 1130186208   ffffffd23dd2ce81 : 0
ffffffd22113c600 : 715132221    ffffffd22107195d : 0
ffffffc3c48b2580 : 2954004226   ffffffc3c47ec9a7 : 0
ffffffc3c07d8c80 : 2379036288   ffffffc3c0704eab : 0
ffffffc0a1313000 : 476339637    ffffffc0a12329f4 : 0
ffffffbe7514af80 : 2160224410   ffffffbe7512b3a8 : 0
ffffffbe410bc340 : 372065889    ffffffbe410838ac : 0
ffffffbcee7dd740 : 1779644049   ffffffbcee78fdb6 : 0
ffffffb889372980 : 1539663863   ffffffb8892921f4 : 0
ffffffb8757c80c0 : 479680247    ffffffb8757198e8 : 0
ffffffb84e443840 : 2250928234   ffffffb84e39932e : 0
ffffffb84a5523c0 : 3478961441   ffffffb84a4d1032 : 0
ffffffb82b939ac0 : 4234041997   ffffffb82b8a2754 : 0
ffffffb6ebf9fa40 : 2595974984   ffffffb6ebeb29ca : 0
ffffffb672eb6080 : 2575639946   ffffffb672df23d2 : 0
ffffffb6590d1000 : 1016509299   ffffffb6590230ac : 0
ffffffb2eccd9ac0 : 2124353155   ffffffb2ecc8ad81 : 0
ffffffb2e0b41200 : 2010439422   ffffffb2e0ab127d : 0
ffffffb2b7dfccc0 : 2838986815

      [download]
      You do not know what you are talking about

      Actually, I do. As you will find out.

      With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
[reply]
[d/l]

        The patches are public; but whether they actually address the perceived problem -- nor even if the perceived problem is actually a problem -- cannot be determined without knowing what the problem is.

        Actually, I do. As you will find out.

        I look forward to reading your patch. But I find it hard to reconcile your two statements. On one hand you admit you don't know what the problem is, yet on the other you assert you know what you are talking about. Both can't be right. IMO if you understand the patches you should be able to figure out the attack and recreate it.

        ---
        $world=~s/war/peace/g

[reply]

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