[tor-relays] Log warning : possible (zlib) compression bomb on middle relays

[petrarca at protonmail.ch]

Same here - obviously something happening all over in Tor (timezone is CET):

Nov 02 05:29:24.000 [warn] Possible compression bomb; abandoning stream.
Nov 02 05:29:25.000 [warn] Possible compression bomb; abandoning stream.
Nov 02 05:29:29.000 [warn] Possible compression bomb; abandoning stream.
Nov 02 05:29:36.000 [warn] Possible compression bomb; abandoning stream.

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
Am Montag, 2. November 2020 17:59 schrieb Christoph Graf <christoph at links-nett.ch>:

> Same here on my bridge:
>
> Nov 2 06:21:04 raspipfupf Tor[2556]: Possible zlib bomb; abandoning stream.
> Nov 2 06:21:04 raspipfupf Tor[2556]: Possible zlib bomb; abandoning stream.
>
> Time is UTC+1, nothing before and after
>
> Cheers, Christoph
>
> On 02.11.20 11:05, Guinness wrote:
>
>> Hi all,
>>
>> We are at least 3 users running middle relays from 0.4.4.5 and after having
>> some logs like those :
>> ```
>> Nov 02 05:30:55.000 [warn] Possible compression bomb; abandoning stream.
>> Nov 02 05:30:55.000 [warn] Possible zlib bomb; abandoning stream.
>> Nov 02 05:30:56.000 [warn] Possible compression bomb; abandoning stream.
>> Nov 02 05:31:00.000 [warn] Possible compression bomb; abandoning stream.
>> Nov 02 05:31:00.000 [warn] Possible compression bomb; abandoning stream.
>> Nov 02 05:31:00.000 [warn] Possible compression bomb; abandoning stream.
>> Nov 02 05:31:55.000 [warn] Possible compression bomb; abandoning stream.
>> Nov 02 05:31:56.000 [warn] Possible compression bomb; abandoning stream.
>> ```
>>
>> I'm wondering if this is an attack or a new feature (haven't checked
>> yet) but I'd like to know how many users are impacted.
>>
>> The interesting informations are :
>>  * Number of warnings
>>  * What kind of relay it is (middle, exit, entry)
>>
>> After your answers, I'll complete the issue I have opened on the bug
>> tracker.
>>
>> Cheers,
>>
>> _______________________________________________
>> tor-relays mailing list
>> tor-relays at lists.torproject.org
>>
>> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
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