I just had a Mac OS X 10.11/ClamXav 2.8.5/ClamAV 0.98.7 user with a similar 
situation.  Appears to be in the US, but I need to get more information to 
verify that and the results of sigtool -i:

Checking official ClamAV definitions
--------------------------------------
ClamAV update process started at Sat Oct 17 11:58:34 2015
main.cvd is up to date (version: 55, sigs: 2424225, f-level: 60, builder: neo)
Downloading daily-20931.cdiff [100%]
Downloading daily-20932.cdiff [100%]
Downloading daily-20933.cdiff [100%]
Downloading daily-20934.cdiff [100%]
Downloading daily-20935.cdiff [100%]
Downloading daily-20936.cdiff [100%]
Downloading daily-20937.cdiff [100%]
Downloading daily-20938.cdiff [100%]
Downloading daily-20939.cdiff [100%]
Downloading daily-20940.cdiff [100%]
Downloading daily-20941.cdiff [100%]
Downloading daily-20942.cdiff [100%]
Downloading daily-20943.cdiff [100%]
Downloading daily-20944.cdiff [100%]
Downloading daily-20945.cdiff [100%]
Downloading daily-20946.cdiff [100%]
Downloading daily-20947.cdiff [100%]
Downloading daily-20948.cdiff [100%]
Downloading daily-20949.cdiff [100%]
Downloading daily-20950.cdiff [100%]
Downloading daily-20951.cdiff [100%]
Downloading daily-20952.cdiff [100%]
Downloading daily-20953.cdiff [100%]
Downloading daily-20954.cdiff [100%]
Downloading daily-20955.cdiff [100%]
Downloading daily-20956.cdiff [100%]
Downloading daily-20957.cdiff [100%]
Downloading daily-20958.cdiff [100%]
Downloading daily-20959.cdiff [100%]
Downloading daily-20960.cdiff [100%]
Downloading daily-20961.cdiff [100%]
Downloading daily-20962.cdiff [100%]
Downloading daily-20963.cdiff [100%]
Downloading daily-20964.cdiff [100%]
Downloading daily-20965.cdiff [100%]
Downloading daily-20966.cdiff [100%]
Downloading daily-20967.cdiff [100%]
Downloading daily-20968.cdiff [100%]
Downloading daily-20969.cdiff [100%]
Downloading daily-20970.cdiff [100%]
Downloading daily-20971.cdiff [100%]
Downloading daily-20972.cdiff [100%]
Downloading daily-20973.cdiff [100%]
Downloading daily-20974.cdiff [100%]
Downloading daily-20975.cdiff [100%]
Downloading daily-20976.cdiff [100%]
Downloading daily-20977.cdiff [100%]
ERROR: Failed to load new database: Malformed database
ERROR: Failed to load new database
--------------------------------------
ClamAV update process started at Sun Oct 18 05:45:07 2015
main.cvd is up to date (version: 55, sigs: 2424225, f-level: 60, builder: neo)
Downloading daily-20931.cdiff [100%]
Downloading daily-20932.cdiff [100%]
Downloading daily-20933.cdiff [100%]
Downloading daily-20934.cdiff [100%]
Downloading daily-20935.cdiff [100%]
Downloading daily-20936.cdiff [100%]
Downloading daily-20937.cdiff [100%]
Downloading daily-20938.cdiff [100%]
Downloading daily-20939.cdiff [100%]
Downloading daily-20940.cdiff [100%]
Downloading daily-20941.cdiff [100%]
Downloading daily-20942.cdiff [100%]
ERROR: cdiff_apply: Incorrect digital signature
ERROR: getpatch: Can't apply patch
Downloading daily.cvd [100%]
ERROR: Verification: Can't verify database integrity
Trying again in 5 secs...
ClamAV update process started at Sun Oct 18 05:52:05 2015
main.cvd is up to date (version: 55, sigs: 2424225, f-level: 60, builder: neo)
Downloading daily-20931.cdiff [100%]
Downloading daily-20932.cdiff [100%]
Downloading daily-20933.cdiff [100%]
Downloading daily-20934.cdiff [100%]
Downloading daily-20935.cdiff [100%]
Downloading daily-20936.cdiff [100%]
Downloading daily-20937.cdiff [100%]
Downloading daily-20938.cdiff [100%]
Downloading daily-20939.cdiff [100%]
Downloading daily-20940.cdiff [100%]
Downloading daily-20941.cdiff [100%]
Downloading daily-20942.cdiff [100%]
Downloading daily-20943.cdiff [100%]
Downloading daily-20944.cdiff [100%]
Downloading daily-20945.cdiff [100%]
Downloading daily-20946.cdiff [100%]
Downloading daily-20947.cdiff [100%]
Downloading daily-20948.cdiff [100%]
ERROR: cdiff_cmd_close: Can't apply DEL at line 1493879 of daily.mdb
ERROR: cdiff_apply: Can't execute command CLOSE
ERROR: cdiff_apply: Error executing command at line 19
ERROR: getpatch: Can't apply patch
Downloading daily.cvd [100%]
ERROR: Verification: Can't verify database integrity
Trying again in 5 secs...
ClamAV update process started at Sun Oct 18 05:53:10 2015
main.cvd is up to date (version: 55, sigs: 2424225, f-level: 60, builder: neo)
Downloading daily-20931.cdiff [100%]
Downloading daily-20932.cdiff [100%]
Downloading daily-20933.cdiff [100%]
Downloading daily-20934.cdiff [100%]
Downloading daily-20935.cdiff [100%]
Downloading daily-20936.cdiff [100%]
Downloading daily-20937.cdiff [100%]
Downloading daily-20938.cdiff [100%]
Downloading daily-20939.cdiff [100%]
Downloading daily-20940.cdiff [100%]
Downloading daily-20941.cdiff [100%]
Downloading daily-20942.cdiff [100%]
Downloading daily-20943.cdiff [100%]
Downloading daily-20944.cdiff [100%]
Downloading daily-20945.cdiff [100%]
Downloading daily-20946.cdiff [100%]
Downloading daily-20947.cdiff [100%]
Downloading daily-20948.cdiff [100%]
ERROR: cdiff_cmd_close: Can't apply DEL at line 1493879 of daily.mdb
ERROR: cdiff_apply: Can't execute command CLOSE
ERROR: cdiff_apply: Error executing command at line 19
ERROR: getpatch: Can't apply patch
Downloading daily.cvd [100%]
ERROR: Verification: Can't verify database integrity
Giving up on database.clamav.net...
Update failed. Your network may be down or none of the mirrors listed in 
/usr/local/clamXav/etc/freshclam.conf is working. Check 
http://www.clamav.net/doc/mirrors-faq.html for possible reasons.

-Al-
 
On Thu, Oct 15, 2015 at 01:41 PM, Rafael Ferreira wrote:
> 
> Odd, we run Debian (Jessie) Linux and we see this problem on quite a few of 
> our hosts; nothing obviously relevant seems to have changed on our side. We 
> will keep looking and report back.
> 
>> On Oct 15, 2015, at 1:15 PM, Steven Morgan <smor...@sourcefire.com> wrote:
>> Thanks, that is working for me with ClamAV 0.98.7. It even worked using
>> http://scanii-assets.s3.amazonaws.com/daily.cvd. What OS and hardware are
>> you using?
>> 
>> On Thu, Oct 15, 2015 at 1:30 PM, Rafael Ferreira <r...@uvasoftware.com>
>> wrote:
>>> 0.98.7
>>> 
>>>>> On Oct 15, 2015, at 8:46 AM, Steven Morgan 
>>>> wrote:
>>>> Rafael,
>>>> 
>>>> I don't see this. Which version of ClamAV are you using?
>>>> 
>>>> Steve
>>>> 
>>>> 
>>>> On Thu, Oct 15, 2015 at 11:24 AM, Rafael Ferreira
>>>> wrote:
>>>>> Howdy folks, we started noticing problems with daily.cvd:
>>>>> 
>>>>> Retrieving http://scanii-assets.s3.amazonaws.com/daily.cvd
>>>>> 
>>>>> Trying to download http://scanii-assets.s3.amazonaws.com/daily.cvd (IP:
>>>>> 54.231.34.41)
>>>>> 
>>>>> Downloading daily.cvd [100%]
>>>>> 
>>>>> Loading signatures from daily.cvd
>>>>> 
>>>>> WARNING: [LibClamAV] cli_parseadd(): Problem adding signature (1b).
>>>>> 
>>>>> WARNING: [LibClamAV] Problem parsing database at line 1097
>>>>> 
>>>>> WARNING: [LibClamAV] Can't load daily.ldb: Malformed database
>>>>> 
>>>>> WARNING: [LibClamAV] cli_tgzload: Can't load daily.ldb
>>>>> 
>>>>> WARNING: [LibClamAV] Can't load
>>>>> /var/lib/clamav/clamav-bde1e525a5ccd73f8aef9d297171cfdc.tmp/clamav-d1391230fbba45ed1a1ab05e2a069102.cvd:
>>>>> Malformed database
>>>>> 
>>>>> ERROR: Failed to load new database: Malformed database
>>>>> 
>>>>> ERROR: During database load : WARNING: [LibClamAV] cli_parse_add():
>>>>> Problem
>>>>> adding signature (1). [...] ERROR: Failed to load new database:
>>>>> Malformed
>>>>> database
>>>>> 
>>>>> WARNING: Database load exited with status 55
>>>>> 
>>>>> ERROR: Failed to load new database
>>>>> 
>>>>> couple of things worth noting, there's no indication of memory pressure
>>>>> on
>>>>> the hosts, the databases do pass a sigtool dump of its contents and were
>>>>> tested for potential in flight corruption.
>>>>> 
>>>>> Anyone else seeing this?
>>>>> 
>>>>> - Rafael



Attachment: smime.p7s
Description: S/MIME cryptographic signature

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