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Re: [Sks-devel] Search returns 500 MB blob

From: Kim Minh Kaplan
Subject: Re: [Sks-devel] Search returns 500 MB blob
Date: Tue, 04 Jun 2019 09:25:26 +0000

Sascha Rommelfangen:

> Hi all,
> Is nobody else affected by this issue?
> Nobody able to reproduce it?
> Cheers,
> Sascha

Yes, searches for the words jr, cix and ie yield 16 keys that have
serverly been abused.

    $ du -hc /tmp/key-*.pgp
    29M     /tmp/key-03d7350a8e44bd76efdcf02e4fd34f4d.pgp
    20M     /tmp/key-0a84c799778a4fbc6fdba0a61909c9ad.pgp
    26M     /tmp/key-5d5673e1a896a9dfb59e2d815b46b7a3.pgp
    89M     /tmp/key-60bf5c0adc380ac4136370a1f125fb95.pgp
    23M     /tmp/key-6e4ec9f1a4a7bd05504f02f1cad6ba33.pgp
    15M     /tmp/key-89827e4c457bd4095ce4abdf866b56be.pgp
    9.5M    /tmp/key-a228a387845f71b4a0d030e5e81176f0.pgp
    1.6M    /tmp/key-a7dd70f37114703dcd61128e8890532c.pgp
    24M     /tmp/key-aaed1419190168b87a44df97cf8cec70.pgp
    80M     /tmp/key-b149ebf1b6d8588d79a5a095c1cd12d2.pgp
    72M     /tmp/key-c23b37ec41ec018dfaabf17fe79bd845.pgp
    49M     /tmp/key-cf9660f3b6fa8e50b3164c4dff770bfa.pgp
    133M    /tmp/key-e10f483b942a5ad6adaa6b53be05fd46.pgp
    119M    /tmp/key-e7ed87d8418531a19dcf65d7f84f65de.pgp
    35M     /tmp/key-ebf15811e4e12e9c455d375d0d4db913.pgp
    29M     /tmp/key-f673d164e9b4a52aa2e7786b35c889cb.pgp
    747M    total

Not that as far as I can see none of them match address@hidden Mays be we
should open a bug for that.

Kim Minh

>> On 27 May 2019, at 15:27, Sascha Rommelfangen <address@hidden> wrote:
>> Hi all,
>> We’re just running into a situation where we looked up a key for the email 
>> address address@hidden All keyservers we tried, including our very own one 
>> at, returned a blob of 500 MB.
>> Some key servers return a timeout after 30 seconds. The situation can also 
>> be tested with key ID 0x62cfc8f5, however, the returned blob is much smaller 
>> (23 MB). 
>> Has anyone else seen this or similar cases and investigated the root cause 
>> and what can be done to prevent systematically the exhaustion of resources?
>> Thank you very much and with kind regards,
>> Sascha Rommelfangen
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