Check: TOSS-04-030900
Tri-Lab Operating System Stack (TOSS) 4 STIG:
TOSS-04-030900
(in version v1 r1)
Title
The TOSS audit records must be off-loaded onto a different system or storage media from the system being audited. (Cat II impact)
Discussion
Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. TOSS installation media provides "rsyslogd." "rsyslogd" is a system utility providing support for message logging. Support for both internet and UNIX domain sockets enables this utility to support both local and remote logging. Couple this utility with "gnutls" (which is a secure communications library implementing the SSL, TLS, and DTLS protocols), and there is now a method to securely encrypt and off-load auditing. Rsyslog provides three ways to forward message: the traditional UDP transport, which is extremely lossy but standard; the plain TCP based transport, which loses messages only during certain situations but is widely available; and the RELP transport, which does not lose messages but is currently available only as part of the rsyslogd 3.15.0 and above. Examples of each configuration: UDP *.* @remotesystemname TCP *.* @@remotesystemname RELP *.* :omrelp:remotesystemname:2514 Note that a port number was given as there is no standard port for RELP. Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224
Check Content
Verify the audit system off-loads audit records onto a different system or media from the system being audited with the following command: $ sudo grep @@ /etc/rsyslog.conf /etc/rsyslog.d/*.conf /etc/rsyslog.conf:*.* @@[remoteloggingserver]:[port] If a remote server is not configured, or the line is commented out, ask the System Administrator to indicate how the audit logs are off-loaded to a different system or media. If there is no evidence that the audit logs are being off-loaded to another system or media, this is a finding.
Fix Text
There are multiple software applications other than rsyslog may be used by the system to accomplish this requirement. This Fix assumes rsyslog is used for offloading logs from the system. Configure the operating system to off-load audit records onto a different system or media from the system being audited by specifying the remote logging server in "/etc/rsyslog.conf" or "/etc/rsyslog.d/[customfile].conf" with the name or IP address of the log aggregation server. *.* @@[remoteloggingserver]:[port]
Additional Identifiers
Rule ID: SV-253032r824768_rule
Vulnerability ID: V-253032
Group Title: SRG-OS-000342-GPOS-00133
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001851 |
The information system off-loads audit records per organization-defined frequency onto a different system or media than the system being audited. |
Controls
Number | Title |
---|---|
AU-4 (1) |
Transfer To Alternate Storage |