Red Hat Bugzilla – Bug 829954
SELinux is preventing /usr/bin/uux from 'getattr' accesses on the file /etc/passwd.
Last modified: 2012-06-16 20:03:49 EDT
libreport version: 2.0.10 executable: /usr/bin/python2.7 hashmarkername: setroubleshoot kernel: 3.3.7-1.fc17.x86_64 time: Thu 07 Jun 2012 11:09:46 PM CEST description: :SELinux is preventing /usr/bin/uux from 'getattr' accesses on the file /etc/passwd. : :***** Plugin catchall (100. confidence) suggests *************************** : :If you believe that uux should be allowed getattr access on the passwd 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 uux /var/log/audit/audit.log | audit2allow -M mypol :# semodule -i mypol.pp : :Additional Information: :Source Context system_u:system_r:uux_t:s0 :Target Context system_u:object_r:passwd_file_t:s0 :Target Objects /etc/passwd [ file ] :Source uux :Source Path /usr/bin/uux :Port <Unknown> :Host (removed) :Source RPM Packages uucp-1.07-29.fc17.x86_64 :Target RPM Packages setup-2.8.48-1.fc17.noarch :Policy RPM selinux-policy-3.10.0-128.fc17.noarch :Selinux Enabled True :Policy Type targeted :Enforcing Mode Permissive :Host Name (removed) :Platform Linux (removed) 3.3.7-1.fc17.x86_64 #1 SMP Mon May 21 : 22:32:19 UTC 2012 x86_64 x86_64 :Alert Count 1 :First Seen Thu 07 Jun 2012 10:54:20 PM CEST :Last Seen Thu 07 Jun 2012 10:54:20 PM CEST :Local ID 4d9586ea-ec7a-4f26-a805-c78b0aaa4b4c : :Raw Audit Messages :type=AVC msg=audit(1339102460.870:29747): avc: denied { getattr } for pid=16907 comm="uux" path="/etc/passwd" dev="dm-1" ino=2765341 scontext=system_u:system_r:uux_t:s0 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file : : :type=SYSCALL msg=audit(1339102460.870:29747): arch=x86_64 syscall=fstat success=yes exit=0 a0=3 a1=7fff027eafa0 a2=7fff027eafa0 a3=0 items=0 ppid=12421 pid=16907 auid=4294967295 uid=10 gid=14 euid=10 suid=10 fsuid=10 egid=14 sgid=14 fsgid=14 tty=(none) ses=4294967295 comm=uux exe=/usr/bin/uux subj=system_u:system_r:uux_t:s0 key=(null) : :Hash: uux,uux_t,passwd_file_t,file,getattr : :audit2allowunable to open /sys/fs/selinux/policy: Permission denied : : :audit2allow -Runable to open /sys/fs/selinux/policy: Permission denied : :
If uux can't access /etc/passwd, it results in mail not being transported, e.g. like this: Jun 6 22:13:07 wombat postfix/pipe[27785]: 4A1D142559: to=<redacted@example.com>, relay=uucp, delay=165316, delays=165316/0/0/0.28, dsn=4.3.0, status=SOFTBOUNCE (service unavailable. Command output: uux: Can't get login name )
Nils does it look up UIDs IE Does it need access to any UID or just root?
Fixed in selinux-policy-3.10.0-129.fc17
(In reply to comment #2) > Nils does it look up UIDs IE Does it need access to any UID or just root? It looks up its own user, i.e. it checkes either LOGNAME, or USER in the environment and if missing runs getlogin() to get the user name, then runs getpwnam() on it to find the UID, alternatively getpwuid(getuid()) if that fails. Does that answer your question?
Ok then it needs auth_use_nsswitch() Rather then just auth_read_passwd()
selinux-policy-3.10.0-130.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/selinux-policy-3.10.0-130.fc17
Package selinux-policy-3.10.0-130.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-130.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-9520/selinux-policy-3.10.0-130.fc17 then log in and leave karma (feedback).
selinux-policy-3.10.0-130.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.