On 08/12/2008 07:12 PM, Ned Slider wrote: > Manuel Wolfshant wrote: >> Ned Slider wrote: >>> Hi list, >>> >>> I've knocked up a contribution on SELinux here: >>> >>> http://wiki.centos.org/HowTos/SELinux >>> >>> I've tried to pitch it as an introduction for those not already >>> familiar with SELinux but also hopefully a useful reference. >>> >>> I'm relatively new to SELinux and have covered pretty much >>> everything I know to the limits of my limited knowledge. If folks >>> think other material needs to be covered then it may be more >>> appropriate for them to make the additions rather than me. Consider >>> it a "get the ball rolling" contribution that the community can add >>> to as necessary :) >>> >>> Comments welcomed, >> I would add the following just before "Sumamry" (in case one wants to >> edit the rules suggested by audit2allow): >> >> Building module policy manually >> >> >> - grep sendmail /var/log/audit/audit.log | audit2allow -M postfix >> - while reviewing the generated postfix.te >> >> module local 1.0; >> >> require { >> type httpd_log_t; >> type postfix_postdrop_t; >> class dir getattr; >> class file { read getattr }; >> } >> >> #============= postfix_postdrop_t ============== >> allow postfix_postdrop_t httpd_log_t:file getattr; >> >> > > Wolfy, > > Are you able to supply an example of the audit.log AVC message(s) that > are used to create this .te policy? It might be useful to show the > actual AVC error messages in explaining this process. > > Thanks, here you are. I hope I have not trashed anything valuable but most of the info must be here PS, for those who might be tempted to comment about the kernel version: I already know what you want to say. -------------- next part -------------- Summary: SELinux is preventing postdrop (postfix_postdrop_t) "getattr" to /var/log/httpd/error_log (httpd_log_t). Detailed Description: SELinux denied access requested by postdrop. It is not expected that this access is required by postdrop and this access may signal an intrusion attempt. It is also possible that the specific version or configuration of the application is causing it to require additional access. Allowing Access: Sometimes labeling problems can cause SELinux denials. You could try to restore the default system file context for /var/log/httpd/error_log, restorecon -v '/var/log/httpd/error_log' If this does not work, there is currently no automatic way to allow this access. Instead, you can generate a local policy module to allow this access - see FAQ (http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385) Or you can disable SELinux protection altogether. Disabling SELinux protection is not recommended. Please file a bug report (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi) against this package. Additional Information: Source Context system_u:system_r:postfix_postdrop_t Target Context root:object_r:httpd_log_t Target Objects /var/log/httpd/error_log [ file ] Source postdrop Source Path /usr/sbin/postdrop Port <Unknown> Host sanitized Source RPM Packages postfix-2.3.3-2 Target RPM Packages Policy RPM selinux-policy-2.4.6-137.1.el5 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name catchall_file Host Name sanitized Platform Linux sanitized 2.6.18-53.1.21.el5 #1 SMP Tue May 20 09:35:07 EDT 2008 x86_64 x86_64 Alert Count 599 First Seen Wed Jul 2 08:27:15 2008 Last Seen Sun Aug 10 22:47:52 2008 Local ID c303a4ea-8e7a-4acc-9118-9cc61c6a2ec8 Line Numbers Raw Audit Messages host=sanitized type=AVC msg=audit(1218397672.372:352): avc: denied { getattr } for pid=4262 comm="postdrop" path="/var/log/httpd/error_log" dev=md2 ino=117005 scontext=system_u:system_r:postfix_postdrop_t:s0 tcontext=root:object_r:httpd_log_t:s0 tclass=file host=sanitized type=SYSCALL msg=audit(1218397672.372:352): arch=c000003e syscall=5 success=no exit=-13 a0=2 a1=7fffd6febca0 a2=7fffd6febca0 a3=0 items=0 ppid=4261 pid=4262 auid=4294967295 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=90 sgid=90 fsgid=90 tty=(none) comm="postdrop" exe="/usr/sbin/postdrop" subj=system_u:system_r:postfix_postdrop_t:s0 key=(null)
