[ZendTo] ClamAV fail
Pedrosi, Derek G.
pedrosi at millercanfield.com
Thu Jul 26 16:07:47 BST 2018
Jules,
I’m the only one with ANY access to this system (other than web), and I was on vacation.
Nevertheless, I’ve comment out the stats lines in clamd.conf and then I received this error.
root at ZendTo5:/opt/zendto/config# /usr/bin/clamdscan preferences.php
ERROR: Could not connect to clamd on LocalSocket /var/run/clamav/clamd.ctl: No such file or directory
----------- SCAN SUMMARY -----------
Infected files: 0
Total errors: 1
Time: 0.000 sec (0 m 0 s)
Likewise in ZendTo the log shows…
Error: Virus scan of dropped-off files /var/zendto/incoming/phpSAkd0U for dgpedrosi failed with ERROR: Could not connect to clamd on LocalSocket /var/run/clamav/clamd.ctl: No such file or directory ----------- SCAN SUMMARY ----------- Infected files: 0 Total errors: 1 Time: 0.000 sec (0 m 0 s)
Then from clamd.conf I commented out these lines
#LocalSocket /var/run/clamav/clamd.ctl
#FixStaleSocket true
And now I can run a command line scan without error:
root at ZendTo5:/opt/zendto/config# /usr/bin/clamdscan preferences.php
----------- SCAN SUMMARY -----------
Infected files: 0
Total errors: 1
Time: 0.000 sec (0 m 0 s)
root at ZendTo5:/opt/zendto/config#
But ZendTo will still not AV scan, from the ZendTo log:
Error: Virus scan of dropped-off files /var/zendto/incoming/phpcz1Ojf for dgpedrosi failed with ----------- SCAN SUMMARY ----------- Infected files: 0 Total errors: 1 Time: 0.000 sec (0 m 0 s)
Also, I’m running Ubuntu 16.04.4 LTS no clamd service to be found:
root at ZendTo5:/opt/zendto/config# service --status-all
[ + ] acpid
[ + ] apache-htcacheclean
[ + ] apache2
[ + ] apparmor
[ + ] apport
[ + ] atd
[ - ] bootmisc.sh
[ - ] checkfs.sh
[ - ] checkroot-bootclean.sh
[ - ] checkroot.sh
[ - ] clamav-daemon
[ + ] clamav-freshclam
[ + ] console-setup
[ + ] cron
But I did reboot the server, and I’m still seeing the issue.
???
From: Jules Field [mailto:Jules at Zend.To]
Sent: Thursday, July 26, 2018 10:27 AM
To: Pedrosi, Derek G. <pedrosi at millercanfield.com>; ZendTo Users <zendto at zend.to>
Subject: Re: [ZendTo] ClamAV fail
Derek,
On 26/07/2018 14:50, Pedrosi, Derek G. wrote:
This is my production server, and no changes were made;
Ah, the famous "But I didn't change anything" defence. :-) :-)
it just started throwing the error.
Ah, but changes *were* made. Just possibly not by you. :-)
Someone (or more likely some*thing*) did a "yum upgrade" or an "apt upgrade", and replaced the copy of ClamAV that was running.
You see that file "clamd.conf.ucf-dist" in your "ls -al" output below? That was modified yesterday morning, which is probably shortly before it all stopped working.
From your /etc/clamav/clamd.conf file, based on the output from "clamdscan" below, you should remove the lines that start "AllowSupplementaryGroups" and "StatsEnabled". Then restart the clamd service ("service clamd restart" will *probably* do the trick on almost any Linux variant). Then try that clamdscan command again and see if it gets further.
Cheers,
Jules.
Running clamdscan:
root at ZendTo5:/opt/zendto/config# /usr/bin/clamdscan --stdout preferences.php
WARNING: Ignoring deprecated option AllowSupplementaryGroups at line 11
ERROR: Parse error at line 79: Unknown option StatsEnabled
ERROR: Can't parse clamd configuration file /etc/clamav/clamd.conf
root at ZendTo5:/opt/zendto/config# clamscan --version
ClamAV 0.100.1/24784/Thu Jul 26 04:44:34 2018
root at ZendTo5:/opt/zendto/config# nano /etc/clamav/clamd.conf
root at ZendTo5:/opt/zendto/config# ls /etc/clamav -la
total 36
drwxr-xr-x 5 root root 4096 Jul 26 09:49 .
drwxr-xr-x 94 root root 4096 Jul 25 06:06 ..
-rw-r--r-- 1 root root 2059 Mar 5 10:19 clamd.conf
-rw-r--r-- 1 root root 1999 Jul 25 06:06 clamd.conf.ucf-dist
-rw-r--r-- 1 root root 2060 Mar 5 10:19 clamd.conf.zendto
-r--r--r-- 1 clamav adm 702 Jul 25 06:06 freshclam.conf
drwxr-xr-x 2 root root 4096 Jan 29 11:14 onerrorexecute.d
drwxr-xr-x 2 root root 4096 Jan 29 11:14 onupdateexecute.d
drwxr-xr-x 2 root root 4096 Jan 29 11:14 virusevent.d
derek
From: ZendTo [mailto:zendto-bounces at zend.to] On Behalf Of Jules Field via ZendTo
Sent: Wednesday, July 25, 2018 12:26 PM
To: Pedrosi, Derek G. via ZendTo <zendto at zend.to><mailto:zendto at zend.to>; ZendTo Users <zendto at zend.to><mailto:zendto at zend.to>
Cc: Jules Field <Jules at Zend.To><mailto:Jules at Zend.To>
Subject: Re: [ZendTo] ClamAV fail
Derek,
Testing it with "clamscan" won't help. It's "clamdscan" that has to work, which is a very different beast.
"clamscan" just does it all at once (which is why it takes so long).
"clamdscan" uses the "clamd" process to actually do the scanning, and hence is much faster as there's no startup time while it loads and compiles all the virus signatures.
If it works with a small text file, but not an archive or docx file, then you've probably run out of disk space in wherever clamd is trying to unpack the archive.
Otherwise, it is almost always permissions/ownership problems.
You shouldn't do any harm by fetching a new copy of the ZendTo installer and *just* doing the "Setup ClamAV" section.
If you want to test it by hand, you need to do this:
Edit the /etc/passwd file and give your apache or www-data user a real shell such as /bin/bash.
"pwconv" (that makes the /etc/shadow file).
"su - apache" (or "su - www-data") to properly become the web server user.
clamdscan /var/zendto/*
clamdscan --fdpass /var/zendto/*
If both of those succeed, then start a big upload going in ZendTo. This will force some data (with the right permissions) into /var/zendto/incoming. While it's running, do "clamdscan /var/zendto/incoming/*" and "clamdscan --fdpass /var/zendto/incoming/*".
By the time you've done all that lot, you've probably got some errors from ClamAV which will help narrow down the cause.
When you've fixed it, remember to put your "/etc/passwd" file back so the shell says "/sbin/nologin" and run the "pwconv" command again.
Hope that helps,
Jules.
On 25/07/2018 17:04, Pedrosi, Derek G. via ZendTo wrote:
Suddenly, my drops are no longer being scanned by AV and users were unable to drop files. No changes were made.
User see this…
Upload Error
The attempt to virus-scan your drop-off failed. Please notify the system administrator.
I’ve since disable AV scan from the preferences.php (it was 'clamdscan' => '/usr/bin/clamdscan --stdout --fdpass',) and now users can drop files.
The details…
From ZendTo log…
2018-07-25 08:22:31 172.16.0.103 [XXXX]: Error: Virus scan of dropped-off files /var/zendto/incoming/phpLfUrV9 /var/zendto/incoming/phpf6ExDv for USER failed with
From the /var/log/clamav dir:
root at ZendTo5:/var/log/clamav# tail freshclam.log
Wed Jul 25 11:02:09 2018 -> --------------------------------------
Wed Jul 25 11:44:24 2018 -> Update process terminated
Wed Jul 25 11:44:25 2018 -> --------------------------------------
Wed Jul 25 11:44:25 2018 -> freshclam daemon 0.100.1 (OS: linux-gnu, ARCH: x86_64, CPU: x86_64)
Wed Jul 25 11:44:25 2018 -> ClamAV update process started at Wed Jul 25 11:44:25 2018
Wed Jul 25 11:44:25 2018 -> main.cvd is up to date (version: 58, sigs: 4566249, f-level: 60, builder: sigmgr)
Wed Jul 25 11:44:25 2018 -> daily.cld is up to date (version: 24781, sigs: 2024541, f-level: 63, builder: neo)
Wed Jul 25 11:44:25 2018 -> bytecode.cld is up to date (version: 325, sigs: 90, f-level: 63, builder: neo)
Wed Jul 25 11:44:25 2018 -> --------------------------------------
root at ZendTo5:/var/log/clamav# tail clamav.log
Wed Jul 25 04:47:22 2018 -> SelfCheck: Database status OK.
Wed Jul 25 04:57:22 2018 -> SelfCheck: Database status OK.
Wed Jul 25 05:07:22 2018 -> SelfCheck: Database status OK.
Wed Jul 25 05:17:22 2018 -> SelfCheck: Database status OK.
Wed Jul 25 05:27:13 2018 -> Reading databases from /var/lib/clamav
Wed Jul 25 05:27:27 2018 -> Database correctly reloaded (6584590 signatures)
Wed Jul 25 05:37:27 2018 -> SelfCheck: Database status OK.
Wed Jul 25 05:47:27 2018 -> SelfCheck: Database status OK.
Wed Jul 25 05:57:27 2018 -> SelfCheck: Database status OK.
Wed Jul 25 06:05:55 2018 -> --- Stopped at Wed Jul 25 06:05:55 2018
Now, I can scan files manually via the command line…
clamscan --verbose /var/log/
----------- SCAN SUMMARY -----------
Known viruses: 6584590
Engine version: 0.100.1
Scanned directories: 1
Scanned files: 43
Infected files: 0
Data scanned: 8.88 MB
Data read: 1.75 MB (ratio 5.07:1)
Time: 19.976 sec (0 m 19 s)
Anywhere else to look?
derek
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Jules
--
Julian Field MEng CEng CITP MBCS MIEEE MACM
Malin, Hebrides: South 5 to 7, occasionally 4 at first. Slight or moderate,
becoming rough in west. Rain later. Good, occasionally poor.
www.Zend.To<http://www.Zend.To>
Twitter: @JulesFM
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Jules
--
Julian Field MEng CEng CITP MBCS MIEEE MACM
'Ensanguining the skies
How heavily it dies
Into the west away;
Past touch and sight and sound
Not further to be found,
How hopeless under ground
Falls the remorseful day.' - A.E.Houseman
www.Zend.To<http://www.Zend.To>
Twitter: @JulesFM
PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654
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