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SELinux is preventing /usr/bin/sss_ssh_knownhostsproxy from read access on the file unix. ***** Plugin catchall (100. confidence) suggests ************************** If you believe that sss_ssh_knownhostsproxy should be allowed read access on the unix file by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do allow this access for now by executing: # grep sss_ssh_knownho /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:fail2ban_t:s0 Target Context system_u:object_r:proc_net_t:s0 Target Objects unix [ file ] Source sss_ssh_knownho Source Path /usr/bin/sss_ssh_knownhostsproxy Port <Unknown> Host server.interlinx.bc.ca Source RPM Packages whois-5.1.1-2.el7.x86_64 Target RPM Packages Policy RPM selinux-policy-3.13.1-60.el7_2.9.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name server.interlinx.bc.ca Platform Linux server.interlinx.bc.ca 3.10.0-327.36.1.el7.x86_64 #1 SMP Sun Sep 18 13:04:29 UTC 2016 x86_64 x86_64 Alert Count 1206 First Seen 2016-10-26 19:26:30 EDT Last Seen 2016-10-27 05:56:58 EDT Local ID 57e2bd68-84e0-482a-abb0-59e60c1d208b Raw Audit Messages type=AVC msg=audit(1477562218.699:55500): avc: denied { read } for pid=21562 comm="whois" name="unix" dev="proc" ino=4026532002 scontext=system_u:system_r:fail2ban_t:s0 tcontext=system_u:object_r:proc_net_t:s0 tclass=file type=SYSCALL msg=audit(1477562218.699:55500): arch=x86_64 syscall=access success=no exit=EACCES a0=7ffe39304c50 a1=4 a2=7ffe39304c5e a3=3 items=0 ppid=21561 pid=21562 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=whois exe=/usr/bin/whois.md subj=system_u:system_r:fail2ban_t:s0 key=(null) Hash: sss_ssh_knownho,fail2ban_t,proc_net_t,file,read
Here's an additional AVC getting caught up: type=AVC msg=audit(1478527518.341:55611): avc: denied { read } for pid=8559 comm="sss_ssh_knownho" name="unix" dev="proc" ino=4026532002 scontext=system_u:system_r:fail2ban_t:s0 tcontext=system_u:object_r:proc_net_t:s0 tclass=file The context (NPI) here is that fail2ban can call both whois as well as an ssh command to execute a command on a remote machine. This is an IPA environment, hence the /usr/bin/sss_ssh_knownhostsproxy.
We're going to close this bug as WONTFIX because * of limited capacity of selinux-policy developers * the bug is related to EPEL component or 3rd party SW only * the bug appears in unsupported configuration We believe this bug can be fixed via a local policy module. For more information please see: * https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/selinux_users_and_administrators_guide/sect-security-enhanced_linux-troubleshooting-fixing_problems#sect-Security-Enhanced_Linux-Fixing_Problems-Allowing_Access_audit2allow If you disagree, please re-open the bug.