Description of problem: nagios can't access cgi's in /usr/lib/nagios/cgi which leads to Internal Server error. Version-Release number of selected component (if applicable): nagios 2.9-1.fc7 nagios-plugins 1.4.8-1.fc7 selinux-policy 2.6.4-26.fc7 How reproducible: every time. Steps to Reproduce: 1. install nagios 2. open web interface 3. select some monitoring site disable selinux and everything works as expected Actual results: error message Internal Server Error Expected results: show some monitoring information Additional info:
The file must be mislabled in that directory restorecon -R -v /var/lib/nagios should fix the context, and make this work I will fix the default contexts of files in that directory, to get created correctly. selinux-policy-2.6.4-31
Unfortunately the relabeling with "restorecon -R -v /var/lib/nagios" did not work.
I tried the following things: 1. trigger events 2. save Nagios AVC Messages in separate File (nagios.log) 3. audit2allow -m nagios -l -i /var/log/audit/nagios.log > nagios.te 4. checkmodule -M -m -o nagios.mod nagios.te 5. semodule -i nagios.pp After doing this no server error occured, but "Error: Could not read object configuration data!". After disable SELinux everything work fine again.
Please attach your audit.log
audit log after triggering some nagios cgi action: type=SYSCALL msg=audit(1186091013.610:1245): arch=40000003 syscall=5 success=no exit=-13 a0=8078860 a1=8000 a2=0 a3=8000 items=0 ppid=2975 pid=20724 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="extinfo.cgi" exe="/usr/lib/nagios/cgi-bin/extinfo.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) type=AVC msg=audit(1186091103.615:1246): avc: denied { search } for pid=20749 comm="extinfo.cgi" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091103.615:1246): arch=40000003 syscall=5 success=no exit=-13 a0=8078860 a1=8000 a2=0 a3=8000 items=0 ppid=2976 pid=20749 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="extinfo.cgi" exe="/usr/lib/nagios/cgi-bin/extinfo.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) type=AVC msg=audit(1186091193.619:1247): avc: denied { search } for pid=20759 comm="extinfo.cgi" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091193.619:1247): arch=40000003 syscall=5 success=no exit=-13 a0=8078860 a1=8000 a2=0 a3=8000 items=0 ppid=2978 pid=20759 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="extinfo.cgi" exe="/usr/lib/nagios/cgi-bin/extinfo.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) type=AVC msg=audit(1186091283.624:1248): avc: denied { search } for pid=20769 comm="extinfo.cgi" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091283.624:1248): arch=40000003 syscall=5 success=no exit=-13 a0=8078860 a1=8000 a2=0 a3=8000 items=0 ppid=2979 pid=20769 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="extinfo.cgi" exe="/usr/lib/nagios/cgi-bin/extinfo.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) type=AVC msg=audit(1186091373.629:1249): avc: denied { search } for pid=20796 comm="extinfo.cgi" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091373.629:1249): arch=40000003 syscall=5 success=no exit=-13 a0=8078860 a1=8000 a2=0 a3=8000 items=0 ppid=2972 pid=20796 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="extinfo.cgi" exe="/usr/lib/nagios/cgi-bin/extinfo.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) [root@MyTux cgi-bin]# tail /var/log/audit/audit.log type=AVC msg=audit(1186091458.134:1267): avc: denied { search } for pid=20836 comm="history.cgi" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091458.134:1267): arch=40000003 syscall=5 success=no exit=-13 a0=80677c0 a1=8000 a2=0 a3=8000 items=0 ppid=2974 pid=20836 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="history.cgi" exe="/usr/lib/nagios/cgi-bin/history.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) type=AVC msg=audit(1186091459.134:1268): avc: denied { search } for pid=20837 comm="summary.cgi" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091459.134:1268): arch=40000003 syscall=5 success=no exit=-13 a0=806b880 a1=8000 a2=0 a3=8000 items=0 ppid=2977 pid=20837 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="summary.cgi" exe="/usr/lib/nagios/cgi-bin/summary.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) type=AVC msg=audit(1186091459.634:1269): avc: denied { search } for pid=20838 comm="notifications.c" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091459.634:1269): arch=40000003 syscall=5 success=no exit=-13 a0=80669c0 a1=8000 a2=0 a3=8000 items=0 ppid=2975 pid=20838 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="notifications.c" exe="/usr/lib/nagios/cgi-bin/notifications.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) type=AVC msg=audit(1186091460.134:1270): avc: denied { search } for pid=20839 comm="showlog.cgi" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091460.134:1270): arch=40000003 syscall=5 success=no exit=-13 a0=8065560 a1=8000 a2=0 a3=8000 items=0 ppid=2976 pid=20839 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="showlog.cgi" exe="/usr/lib/nagios/cgi-bin/showlog.cgi" subj=user_u:system_r:httpd_t:s0 key=(null) type=AVC msg=audit(1186091461.134:1271): avc: denied { search } for pid=20840 comm="config.cgi" name="nagios" dev=dm-0 ino=2480657 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nagios_log_t:s0 tclass=dir type=SYSCALL msg=audit(1186091461.134:1271): arch=40000003 syscall=5 success=no exit=-13 a0=8069440 a1=8000 a2=0 a3=8000 items=0 ppid=2978 pid=20840 auid=500 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="config.cgi" exe="/usr/lib/nagios/cgi-bin/config.cgi" subj=user_u:system_r:httpd_t:s0 key=(null)
Should be fixed in selinux-policy-2.6.4-34
Moving modified bugs to closed