09-09-2013
Problem with structure of authlog in regard to an external log Auditing system.
Hello everyone,
I hope I'm posting my question in the right section as it is not too easy to find the ideal spot for this one, especially for a brandspankingnew user of this forum. As this might be something simple I chose the Dummy section. By all means, feel free to move the post if not at the right place here.
The ArcSight auditing system deployed by my Security department has some troubles interpreting specific records in my managed system's auth_log. When a successful login is done you will see the next (anonimized) record logged in the auth_log:
Sep 9 13:49:49 SYSTEMNAME sshd[1613]: [ID 800047 auth.notice] Failed none for USERNAME from XX.XX.XX.XX port XXXX ssh2
I have marked the problematic piece of the sentence by making it bold. The specific part of the sentence "Failed none" unfortunately starts with "Failed" which makes our auditing system think it is a failed login, while it is a successful login.
Unfortunately a change on ArcSight side is out of the question as my system is apparently the only one using this odd phrasing according to support on that side. Switching off auth.notice is also out of the question because they need to be able to see successful logins, which would be gone if I'd disable auth.notice.
I have been looking into how i can manipulate the message logged in the auth_log, but I have been unable to find a befitting way to tackle this problem.
Systeminfo:
PAM seems to be installed and used
SunOS SYSTEMNAME 5.10 Generic_142900-10 sun4v sparc SUNW,Netra-T5440
The question now of course is, does someone know a way of manipulating this sentence structure without having to hack into the syslogger? I've found references to authentication order changing the logged message, but I have been unable to locate a guide that tells me how to do this.
Thanks in advance for your help guys!
Best regards,
Sjleegketting
The Netherlands
Last edited by Sjleegketting; 09-09-2013 at 09:15 AM..
Reason: forgot a quite important part of the problem.
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LEARN ABOUT OSF1
syslog.conf
syslog.conf(4) Kernel Interfaces Manual syslog.conf(4)
NAME
syslog.conf - syslogd configuration file
SYNOPSIS
facility.severity destination Where: Is part of the system generating the message, specified in /usr/include/sys/syslog_pri.h.
See also the syslogd(8) reference page. The severity level, which can be emerg, alert, crit, err, warning, notice, info, or debug. See
/usr/include/sys/syslog_pri.h.
The syslogd daemon logs all messages of the specified severity level plus all messages of greater severity. For example, if you
specify level err, all messages of levels err, crit, alert, and emerg or panic are logged. A local file pathname to a log file, a
host name for remote logging or a list of users. In the latter case the users will receive messages when they are logged in. An
asterisk (*) causes a message to be sent to all users who are currently logged in.
DESCRIPTION
The /etc/syslog.conf file is a system file that enables you to configure or filter events that are to be logged by syslogd. You can specify
more than one facility and its severity level by separating them with semicolons.
You can specify more than one facility logs to the same file by separating the facilities with commas, as shown in the EXAMPLES section.
The syslogd daemon ignores blank lines and lines that begin with an octothorpe (#). You can specify # as the first character in a line to
include comments in the file or to disable an entry. The facility and severity level are separated from the destination by one or more tab
characters.
If you want the syslogd daemon to use a configuration file other than the default, you must specify the file name with the following com-
mand: # syslogd -f config_file
Daily Log Files
You can specify in the /etc/syslog.conf file that the syslogd daemon create daily log files. To create daily log files, use the following
syntax to specify the path name of the message destination: /var/adm/syslog.dated/ { file} The file variable specifies the name of the log
file, for example, mail.log or kern.log. If you specify a /var/adm/syslog.dated/file path name destination, each day the syslogd daemon
creates a sub-directory under the /var/adm/syslog.dated directory and a log file in the sub-directory, using the following syntax:
/var/adm/syslog.dated/ date / file Where: The date variable specifies the day, month, and time that the log file was created. The file
variable specifies the name of the log file you previously specified in the /etc/syslog.conf file. The syslogd daemon automatically cre-
ates a new date directory every 24 hours and also when you boot the system. The current directory is a link to the latest date directory.
To get the latest logs, you only need to reference the /var/adm/syslog.dated/current directory.
EXAMPLES
The following is a sample /etc/syslog.conf file: # # syslogd config file # # facilities: kern user mail daemon auth syslog lpr binary #
priorities: emerg alert crit err warning notice info debug # kern.debug /var/adm/syslog.dated/kern.log user.debug /var/adm/sys-
log.dated/user.log daemon.debug /var/adm/syslog.dated/daemon.log auth.crit;syslog.debug /var/adm/syslog.dated/syslog.log mail,lpr.debug
/var/adm/syslog.dated/misc.log msgbuf.err /var/adm/crash.dated/msgbuf.savecore kern.debug /var/adm/messages kern.debug /dev/console *.emerg
*
FILES
/etc/syslog.conf
/etc/syslog.auth - Authorization file for remote logging.
/usr/include/sys/syslog_pri.h - Common components of a syslog event log record.
RELATED INFORMATION
Commands: /usr/sbin/syslogd(8), /usr/sbin/binlogd(8)
System Administration delim off
syslog.conf(4)