CCMP: replay detected

Jason Carr jason at flacid.org
Wed Sep 21 21:00:06 EDT 2005


I'm getting this error and then it's disconnecting:

wifi0: TXEXC - status=0x0004 ([Discon]) tx_control=000c
    retry_count=0 tx_rate=110 fc=0x4208 (Data::0 FromDS)
    A1=00:12:f0:34:60:7f A2=00:09:5b:2f:83:83 A3=00:09:5b:2f:83:83 
A4=00:00:00:00 
                                                            :00:00


Maybe that will help...


Jouni Malinen wrote:
> On Tue, Sep 20, 2005 at 11:41:41AM -0400, Jason Carr wrote:
> 
>> I got this, it's the only thing keeping me from having a wireless link
>> stay up the whole night (I've had a huge list of problems I've finally
>> sorted out).
>>
>> This happened randomly at around 5:30am.  Is there a way to prevent this
>> from happening?  I'd rather my MAC not get banned for 60 seconds (or
>> whatever the "ban" time is for replay attacks) every night.  It
>> generally kills my connection to the outside world.
> 
> Do you mean that this is breaking the connection completely? For how
> long a time?
> 
>> CCMP: replay detected: STA=00:12:f0:34:60:7f previous PN 000000000080
>> received PN 000000000001
> 
> CCMP does not have anything like TKIP countermeasures which would be
> blocking the stations.. Packets with replayed PN are just being dropped.
> The station can continue using the network after this without any wait
> period, as long as the PN is correct (i.e., larger than anything
> previously used with the current key).
> 




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