[Clamav-users] virus threats to Linux (was: PhishingScanURLs is dreadfully slow/CPU-intensive)

2007-11-13 Thread Tilman Schmidt
Kelson schrieb:
 Tilman Schmidt wrote:
 Also, OpenOffice on Linux is normally run from a non-privileged user ID,
 heavily limiting the ability of any malicious macro to harm or propagate.
 
 Huh?  What difference does running as a non-privileged user make when 
 the method of infection is to spread via *documents*?  It doesn't need 
 root access to modify the user's own files.

If that's all it does then yes, running non-privileged doesn't change
anything.

-- 
Tilman Schmidt
Abteilungsleiter Technik

Tilman Schmidt  [EMAIL PROTECTED]
Phoenix Software GmbH   Tel. +49 228 97199 0
Geschäftsführer: W. Grießl Fax  +49 228 97199 99
Adolf-Hombitzer-Str. 12   www.phoenixsoftware.de
53227 Bonn, GermanyAmtsgericht Bonn HRB 2934




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Re: [Clamav-users] Error message appended to subject line

2007-11-13 Thread Nigel Horne

Tony Baker wrote:

Hi after a recent upgrade of ClamAV

Some mail is having   (No virus check: internal error)   appended to
the subject line.


That message appears nowhere in the ClamAV source code, so I presume
it's generated by some 3rd party software which you haven't told us you're
using and I would suggest aiming your enquiry to their mailing list.


Tony



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[Clamav-users] Error message appended to subject line

2007-11-13 Thread Tony Baker
Hi after a recent upgrade of ClamAV

Some mail is having   (No virus check: internal error)   appended to
the subject line.

However checking through the logs the mail is showing that is Passed
CLEAN

Can someone tell me where this appending of the subject line is being
generated from.
More importantly is it a problem that requires fixing.


Sending a test virus from eicar.com gets picked up as a virus
correctly but doesn't append the subject line


Tony
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Re: [Clamav-users] Error message appended to subject line

2007-11-13 Thread Tony Baker
Tony Baker wrote:

 Hi after a recent upgrade of ClamAV
 Some mail is having   (No virus check: internal error)   appended to
 the subject line.


Nigel Horne wrote:
That message appears nowhere in the ClamAV source code, so I presume
it's generated by some 3rd party software which you haven't told us  
you're
using and I would suggest aiming your enquiry to their mailing list.


Nigel Hi !
Thanks for the reply

Apologies if I have sent this to the wrong list, but the message  
started occurring after an upgrade of ClamAV.

I have also upgraded spamassassin and amavis-new, but the messages  
started after upgrading ClamAV.

My system is an Intel Apple Xserver running MacOSX 10.4.10 using  
postfix for mail.


Do you think I should be trying the amavis or spamassassin lists then??


Tony


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Re: [Clamav-users] Error message appended to subject line

2007-11-13 Thread Rob MacGregor
On Nov 13, 2007 10:42 AM, Tony Baker [EMAIL PROTECTED] wrote:

 Apologies if I have sent this to the wrong list, but the message
 started occurring after an upgrade of ClamAV.

 I have also upgraded spamassassin and amavis-new, but the messages
 started after upgrading ClamAV.

---SNIP---
 Do you think I should be trying the amavis or spamassassin lists then??

As you're probably using amavis for calling clamav I'd suggest you try
the amavis list.  Be sure to provide details that you've missed on
this thread, like actual version numbers and how you're calling clamav
from amavis ;)

-- 
 Please keep list traffic on the list.

Rob MacGregor
  Whoever fights monsters should see to it that in the process he
doesn't become a monster.  Friedrich Nietzsche
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Re: [Clamav-users] Accurate subjects (was Re: PhishingScanURLs is dreadfully slow/CPU-intensive)

2007-11-13 Thread Jan-Pieter Cornet
On Mon, Nov 12, 2007 at 04:22:47PM -0500, David F. Skoll wrote:
  My own opinion is that the developers are not going to change the default
  settings since they are what the majority of users would want enabled by
  default.
 
 Really?  All posters on this thread who gave an opinion wanted
 PhishingScanURLs off by default.  I invite users who want
 PhishingScanURLs to be on by default to come forward; I'll happily go
 with the majority decision.

If there's going to be a vote, I haven't expressed my opinion in this
thread yet.

PhishingScanURLs should be off, in my opinion, for every mailserver
installation that actually cares about delivering legitimate mails to
its users. So that would imply the default to be off.

In fact, this very feature is the reason we are considering to stop the
use of ClamAV. Complete lack of a standard naming scheme to distinguish
between viruses and phishing mails is also a factor here.

The reason we're so concerned about this is the false positive rate.
Traditionally, virus scanners have had a negligible false positive
ratio (less than 1 in 1E9, typically). This means it is in
practice no problem to flat-out reject or discard mails that are flagged
as a virus.

However, spam and phishing detection has a much higher false positive
rate, so it's very unwise to discard the mails, and it's usually bad
to reject them (because of automatic bounce handling by legitimate bulk
mailers), so we put such mails in a special folder.

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Re: [Clamav-users] Accurate subjects (was Re: PhishingScanURLs is dreadfully slow/CPU-intensive)

2007-11-13 Thread G.W. Haywood
Hi there,

On Monday November 12, 2007 at 04:22:47 (PM) David F. Skoll wrote:

 Really?  All posters on this thread who gave an opinion wanted
 PhishingScanURLs off by default.

 I invite users who want PhishingScanURLs to be on by default to come
 forward; I'll happily go with the majority decision.

I invite users who really care about this issue to send mail directly
to Mr. Skoll, and not to add to the noise on the ClamAV mailing list.


On Tue, 13 Nov 2007 Dennis Peterson wrote:

 I think it's a non-issue. Even timid users need to edit the file as
 a minimum to disable the Example line. Once there I'm certain they
 can then change the other critical areas that require attention.

+1 to that, and I don't intend to add any pseudo-legitimacy to this
voting nonsense either.

There are more important issues.  Please let's kill this thread.

--

73,
Ged.
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Re: [Clamav-users] Accurate subjects (was Re: PhishingScanURLs is dreadfully slow/CPU-intensive)

2007-11-13 Thread David F. Skoll
G.W. Haywood wrote:

 I invite users who really care about this issue to send mail directly
 to Mr. Skoll, and not to add to the noise on the ClamAV mailing list.

OK.  Off-list to [EMAIL PROTECTED] and I will summarise.

 There are more important issues.  Please let's kill this thread.

There are more important issues, maybe.  However, I think
on-by-default code that is inefficient, badly-written, a source of
false-positives and of dubious value in a virus-scanner is pretty
important to discuss.

Regards,

David.
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Re: [Clamav-users] Accurate subjects (was Re: PhishingScanURLs is dreadfully slow/CPU-intensive)

2007-11-13 Thread jef moskot
On Tue, 13 Nov 2007 Dennis Peterson wrote:
 Even timid users need to edit the file as a minimum to disable the
 Example line.

Another point is that those who use clamscan (not the daemon) will have
the default behavior changed more invisibly.  You have to pass a parameter
to disable the anti-phishing stuff, and clamscan users aren't used to
making config changes to get the same behavior.

It's not the end of the world, but it is a shock to the system when the
behavior of a program changes so drastically.

Jeffrey Moskot
System Administrator
[EMAIL PROTECTED]
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