SV-261462r996793_rule
V-261462
SRG-OS-000327-GPOS-00127
SLEM-05-654195
CAT II
10
Configure SLEM 5 to generate an audit record for any privileged use of the "execve" system call.
Add or modify the following lines in "/etc/audit/rules.d/audit.rules" file:
-a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -k setuid
-a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -k setuid
-a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -k setgid
-a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -k setgid
To reload the rules file, restart the audit daemon:
> sudo systemctl restart auditd.service
or issue the following command:
> sudo augenrules --load
Verify SLEM 5 generates an audit record for any privileged use of the "execve" system call with the following command:
> sudo auditctl -l | grep -w 'execve'
-a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -F key=setuid
-a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -F key=setuid
-a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -F key=setgid
-a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -F key=setgid
If both the "b32" and "b64" audit rules for "SUID" files are not defined, this is a finding.
If both the "b32" and "b64" audit rules for "SGID" files are not defined, this is a finding.
Note: The "key=" value is arbitrary and can be different from the example output above.
V-261462
False
SLEM-05-654195
Verify SLEM 5 generates an audit record for any privileged use of the "execve" system call with the following command:
> sudo auditctl -l | grep -w 'execve'
-a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -F key=setuid
-a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -F key=setuid
-a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -F key=setgid
-a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -F key=setgid
If both the "b32" and "b64" audit rules for "SUID" files are not defined, this is a finding.
If both the "b32" and "b64" audit rules for "SGID" files are not defined, this is a finding.
Note: The "key=" value is arbitrary and can be different from the example output above.
M
5596