clamd DoS?

Julian Field MailScanner at
Mon Sep 15 17:07:48 IST 2008

Raymond Dijkxhoorn wrote:
> Hi!
>> Also with ClamAV 0.94 and latest MS beta it breaks. We just upgraded.
>> I just ran the message with clamd and had no problems at all.
>> At Mon Sep 15 16:29:30 2008 the virus scanner said:
>>  Clamd: was infected: Trojan.Agent-49425=20
>> # clamscan --version
>> ClamAV 0.94/8247/Mon Sep 15 13:04:53 2008
> We have 4 different site that are having all the same issue, with 
> various versions of MailScanner. I dont know if we can test feeding it 
> Clam directly. But inside MailScannner with ClamD running it really 
> breaks. So strange.
In /usr/sbin/MailScanner there are a couple of calls to "Explode". 
Immediately after them, add a line saying
and it will stop straight after the attachment unpacking.
Then you can go into /var/spool/MailScanner/incoming, find the relevant 
directory and see what attachments it pulled out.
Then try clamscan-ing them by hand. If the attachments look okay in that 
directory, then it's a clamd issue I think. I would be interested to see 
what clamscan makes of them when run by hand.


Julian Field MEng CITP CEng
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