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Odd emit when starting amavisd 2.8.0
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Quanah Gibson-Mount  
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 More options Jul 13 2012, 12:03 pm
Newsgroups: mailing.unix.amavis-user
From: qua...@zimbra.com (Quanah Gibson-Mount)
Date: Fri, 13 Jul 2012 09:03:50 -0700
Local: Fri, Jul 13 2012 12:03 pm
Subject: Odd emit when starting amavisd 2.8.0
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I just upgraded to amavisd-new 2.8.0, and I see the following emitted when
I start up:

zimbra@zre-ldap002:~$ zmamavisdctl start
Starting amavisd...Amavis::Util: can't obtain a tainted string at
/opt/zimbra/amavisd/sbin/amavisd line 2609.
done.

zimbra@zre-ldap002:~$ echo $?
0

It doesn't appear to stop amavis from running:

zimbra@zre-ldap002:~$ ps -eaf | grep amavis
zimbra    6174     1  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (master)
zimbra    6175  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6176  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6177  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6178  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6179  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6180  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6181  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6182  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6183  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6184  6174  0 09:01 ?        00:00:00
/opt/zimbra/amavisd/sbin/amavisd (virgin child)
zimbra    6195  3166  0 09:01 pts/0    00:00:00 grep amavis

The block in question is:

 2602 use vars qw($enc_ascii $enc_utf8 $enc_tainted);
 2603 BEGIN {
 2604   $enc_ascii = Encode::find_encoding('ascii');
 2605   $enc_utf8  = Encode::find_encoding('UTF-8');
 2606   $enc_ascii  or die "Amavis::Util: unknown encoding 'ascii'";
 2607   $enc_utf8   or die "Amavis::Util: unknown encoding 'UTF-8'";
 2608   $enc_tainted = substr($ENV{PATH}.$ENV{HOME}, 0,0);  # tainted empty
string
 2609   tainted($enc_tainted) or warn "Amavis::Util: can't obtain a tainted
string";
 2610   1;
 2611 }

Any idea what the cause is?

Thanks,
Quanah

--

Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration


 
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Mark Martinec  
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 More options Jul 14 2012, 8:29 am
Newsgroups: mailing.unix.amavis-user
From: Mark.Martinec+ama...@ijs.si (Mark Martinec)
Date: Sat, 14 Jul 2012 14:29:39 +0200
Local: Sat, Jul 14 2012 8:29 am
Subject: Re: Odd emit when starting amavisd 2.8.0
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Quanah,

> I just upgraded to amavisd-new 2.8.0, and I see the following emitted
> when I start up:

> $ zmamavisdctl start
> Starting amavisd...Amavis::Util: can't obtain a tainted string at
> /opt/zimbra/amavisd/sbin/amavisd line 2609.
> The block in question is:
> 2608   $enc_tainted = substr($ENV{PATH}.$ENV{HOME}, 0,0);
> 2609   tainted($enc_tainted) or warn "Amavis::Util: can't obtain a
> tainted string";
> Any idea what the cause is?

Funny. Will investigate when I get home.
It is harmless in itself, but shows that some of the Perl's
taint checks will be less effective. Are you perhaps
removing the -t flag from the first line in a file 'amavisd'?

What version of Perl is this? OS is Linux I presume.

   Mark


 
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Quanah Gibson-Mount  
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 More options Jul 16 2012, 1:18 pm
Newsgroups: mailing.unix.amavis-user
From: qua...@zimbra.com (Quanah Gibson-Mount)
Date: Mon, 16 Jul 2012 10:18:35 -0700
Local: Mon, Jul 16 2012 1:18 pm
Subject: Re: Odd emit when starting amavisd 2.8.0
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--On Saturday, July 14, 2012 2:29 PM +0200 Mark Martinec

Yes, we are, although I don't recall the reasons behind it.  Something I
inherited.  I will see if it is still necessary.

> What version of Perl is this? OS is Linux I presume.

This is perl, v5.10.1 (*) built for x86_64-linux-gnu-thread-multi, Ubuntu
10 LTS

--Quanah

--

Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration


 
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Quanah Gibson-Mount  
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 More options Jul 17 2012, 5:14 pm
Newsgroups: mailing.unix.amavis-user
From: qua...@zimbra.com (Quanah Gibson-Mount)
Date: Tue, 17 Jul 2012 14:14:46 -0700
Local: Tues, Jul 17 2012 5:14 pm
Subject: Re: Odd emit when starting amavisd 2.8.0
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--On Monday, July 16, 2012 10:18 AM -0700 Quanah Gibson-Mount

<qua...@zimbra.com> wrote:
>> Funny. Will investigate when I get home.
>> It is harmless in itself, but shows that some of the Perl's
>> taint checks will be less effective. Are you perhaps
>> removing the -t flag from the first line in a file 'amavisd'?

> Yes, we are, although I don't recall the reasons behind it.  Something I
> inherited.  I will see if it is still necessary.

Removing taint was due to the fact we set PERL5LIB so that amavisd can find
the modules we ship.  PERL5LIB varies depending on OS.

As an improved solution, I've instead made it so that amavisd now untaints
perl5lib:

use lib $ENV{PERL5LIB} =~ /([^:]+)/g;

and re-enabled taint.  It appears to run just fine with that solution in
place.

--Quanah

--

Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration


 
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