[clamav-users] ClamAV's 'configure' doesn't seem to complain about invalid options

[Paul Kosinski via clamav-users]

Building 0.103.6, I ran 'configure' with the option "--disable-clamonaccess" 
(instead of "--disable-clamonacc") and got no error or warning that the option 
was not recognized. 

I did this because I realized that I had still been using the old 
"--disable-clamuko", which also had no effect, and gave no warning that it was 
ignored.

Since I never tried to use either feature (and divert all the systemd stuff to 
a dummy directory), the fact that these options were ignored just wasted some 
disk space.

But there might be situations where misspelled options being silently ignored 
could cause serious problems.
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Re: [clamav-users] clamav overload ec2 instances

[Micah Snyder (micasnyd) via clamav-users]

Hi Emanuel,

I see you mention clamd and provide a clamd.conf file.  But then you say you're 
running clamscan, which doesn't require clamd and loads the databases itself.  
So, if you have clamd running (uses a bunch of RAM to load databases) and then 
use clamscan (also uses a bunch of RAM to load the databases) instead of 
clamDscan (which would just send scan requests to clamd) -- yeah, I could see 
that running your container out of memory.

Try using clamdscan instead of clamscan -- or shut down clamd and only use 
clamscan.

Cheers,
Micah


Micah Snyder
ClamAV Development
Talos
Cisco Systems, Inc.

From: clamav-users  on behalf of Emanuel 
Gonzalez 
Sent: Tuesday, July 19, 2022 10:29 AM
To: clamav-users@lists.clamav.net 
Subject: [clamav-users] clamav overload ec2 instances


Hi, i use clamav in AWS ec2 instances c5.large. When I run the clamscan command 
/home/user/testfile the cpu usage is triggered and the instance stops 
responding.

Here my config:

clamd --version
ClamAV 0.103.6/26606/Tue Jul 19 04:57:30 2022


LocalSocket /var/run/clamav/clamd.ctl
FixStaleSocket true
LocalSocketGroup clamav
LocalSocketMode 666
# TemporaryDirectory is not set to its default /tmp here to make overriding
# the default with environment variables TMPDIR/TMP/TEMP possible
User clamav
ScanMail true
ScanArchive true
ArchiveBlockEncrypted false
MaxDirectoryRecursion 15
FollowDirectorySymlinks false
FollowFileSymlinks false
ReadTimeout 180
MaxThreads 12
MaxConnectionQueueLength 15
LogSyslog false
LogRotate true
LogFacility LOG_LOCAL6
LogClean false
LogVerbose false
PreludeEnable no
PreludeAnalyzerName ClamAV
DatabaseDirectory /var/lib/clamav
OfficialDatabaseOnly false
SelfCheck 3600
Foreground false
Debug false
ScanPE true
MaxEmbeddedPE 10M
ScanOLE2 true
ScanPDF true
ScanHTML true
MaxHTMLNormalize 10M
MaxHTMLNoTags 2M
MaxScriptNormalize 5M
MaxZipTypeRcg 1M
ScanSWF true
ExitOnOOM false
LeaveTemporaryFiles false
AlgorithmicDetection true
ScanELF true
IdleTimeout 30
CrossFilesystems true
PhishingSignatures true
PhishingScanURLs true
PhishingAlwaysBlockSSLMismatch false
PhishingAlwaysBlockCloak false
PartitionIntersection false
DetectPUA false
ScanPartialMessages false
HeuristicScanPrecedence false
StructuredDataDetection false
CommandReadTimeout 30
SendBufTimeout 200
MaxQueue 100
ExtendedDetectionInfo true
OLE2BlockMacros false
AllowAllMatchScan true
ForceToDisk false
DisableCertCheck false
DisableCache false
MaxScanTime 12
MaxScanSize 100M
MaxFileSize 25M
MaxRecursion 16
MaxFiles 1
MaxPartitions 50
MaxIconsPE 100
PCREMatchLimit 1
PCRERecMatchLimit 5000
PCREMaxFileSize 25M
ScanXMLDOCS true
ScanHWP3 true
MaxRecHWP3 16
StreamMaxLength 25M
LogFile /var/log/clamav/clamav.log
LogTime true
LogFileUnlock false
LogFileMaxSize 0
Bytecode true
BytecodeSecurity TrustSigned
BytecodeTimeout 6
OnAccessMaxFileSize 5M

Any ideas??
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