Re: [tor-dev] DNS/DNSSEC resolving in Tor (PoC implementation)

[Ondrej Mikle <ondrej.mikle@xxxxxxxxx>]

On 01/30/2012 10:45 AM, Roger Dingledine wrote:
> On Thu, Jan 26, 2012 at 10:42:53PM +0100, Ondrej Mikle wrote:
>> Also, this seems to be a bug in
>> relay.c:connection_edge_process_relay_cell_not_open(), the
>> RELAY_COMMAND_RESOLVED case:
>>
>>     answer_len = cell->payload[RELAY_HEADER_SIZE+1];
>>     if (rh->length < 2 || answer_len+2>rh->length) {...}
>>
>> Payload is accessed before checking bounds.
> 
> cell->payload is a fixed-size array. It's going to be there no matter
> what values are in it.
> 
> Unless I'm misunderstanding you?

You're right. For some reason I thought it was malloc-ed buffer, but it's not.

Ondrej
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