| Summary: | SELinux is preventing /bin/bash from using the 'transition' accesses on a process. | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | T.C. Hollingsworth <tchollingsworth> | ||||
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | unspecified | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 16 | CC: | dominick.grift, dwalsh, dwmw2, maycon.franca, mgrepl, silentdi | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | abrt_hash:e7e3f573c763078a0238edeefccaa24faf151ed3c79f36997bf3fcd67ad1269f | ||||||
| Fixed In Version: | selinux-policy-3.10.0-51.fc16 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2011-11-05 01:33:06 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Attachments: |
|
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Created attachment 526437 [details]
YUM transaction that caused AVC denial
This looks like for some reason you logged in as bootloader_t? Which is very wrong? id -Z (In reply to comment #2) > This looks like for some reason you logged in as bootloader_t? Which is very > wrong? > > id -Z # id -Z unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 I haven't touched anything SELinux on this machine whatsoever. That just happened in the middle of the attached RPM transaction. I thought it might be the kernel update since that's the only thing that should have had anything to do with GRUB, but "yum reinstall kernel" didn't reproduce it. Are you able to reproduce it? Yes, it happened again yesterday when I got kernel-3.1.0-0.rc9.git0.0.fc16.x86_64.
/var/log/yum.log:
Oct 09 09:46:40 Updated: 1:xscreensaver-base-5.15-2.fc16.x86_64
Oct 09 09:46:53 Updated: abrt-libs-2.0.4.981-3.fc16.x86_64
Oct 09 09:46:56 Updated: libkgeomap-2.2.0-1.fc16.x86_64
Oct 09 09:46:58 Updated: 1:xscreensaver-extras-base-5.15-2.fc16.x86_64
Oct 09 09:46:59 Updated: libkface-2.2.0-1.fc16.x86_64
Oct 09 09:47:13 Updated: digikam-2.2.0-1.fc16.x86_64
Oct 09 09:47:17 Updated: digikam-libs-2.2.0-1.fc16.x86_64
Oct 09 09:47:24 Updated: 1:xscreensaver-extras-5.15-2.fc16.x86_64
Oct 09 09:47:25 Updated: 1:xscreensaver-gl-base-5.15-2.fc16.x86_64
Oct 09 09:47:29 Updated: 1:xscreensaver-gl-extras-5.15-2.fc16.x86_64
Oct 09 09:47:32 Updated: libreport-2.0.6-2.fc16.x86_64
Oct 09 09:47:34 Updated: libreport-python-2.0.6-2.fc16.x86_64
Oct 09 09:47:38 Updated: abrt-2.0.4.981-3.fc16.x86_64
Oct 09 09:47:40 Updated: abrt-retrace-client-2.0.4.981-3.fc16.x86_64
Oct 09 09:47:41 Updated: abrt-addon-python-2.0.4.981-3.fc16.x86_64
Oct 09 09:47:46 Updated: abrt-addon-ccpp-2.0.4.981-3.fc16.x86_64
Oct 09 09:47:47 Updated: libreport-plugin-logger-2.0.6-2.fc16.x86_64
Oct 09 09:47:49 Updated: libreport-gtk-2.0.6-2.fc16.x86_64
Oct 09 09:47:52 Updated: abrt-gui-2.0.4.981-3.fc16.x86_64
Oct 09 09:47:57 Updated: libreport-plugin-bugzilla-2.0.6-2.fc16.x86_64
Oct 09 09:47:59 Updated: libreport-plugin-kerneloops-2.0.6-2.fc16.x86_64
Oct 09 09:48:03 Updated: abrt-addon-kerneloops-2.0.4.981-3.fc16.x86_64
Oct 09 09:48:05 Updated: abrt-addon-vmcore-2.0.4.981-3.fc16.x86_64
Oct 09 09:48:06 Updated: libkvkontakte-2.2.0-1.fc16.x86_64
Oct 09 09:48:07 Updated: kipi-plugins-libs-2.2.0-1.fc16.x86_64
Oct 09 09:48:20 Updated: kipi-plugins-2.2.0-1.fc16.x86_64
Oct 09 09:48:22 Updated: 1:cups-libs-1.5.0-15.fc16.x86_64
Oct 09 09:48:36 Updated: vlc-core-1.1.12-1.fc16.x86_64
Oct 09 09:48:52 Updated: vlc-1.1.12-1.fc16.x86_64
Oct 09 09:48:55 Updated: 1:cups-devel-1.5.0-15.fc16.x86_64
Oct 09 09:48:57 Updated: abrt-desktop-2.0.4.981-3.fc16.x86_64
Oct 09 09:48:59 Updated: libreport-newt-2.0.6-2.fc16.x86_64
Oct 09 09:48:59 Updated: 1:xscreensaver-5.15-2.fc16.x86_64
Oct 09 09:49:09 Updated: kernel-headers-3.1.0-0.rc9.git0.0.fc16.x86_64
Oct 09 09:49:54 Installed: kernel-devel-3.1.0-0.rc9.git0.0.fc16.x86_64
Oct 09 09:49:59 Updated: 1:grub2-1.99-7.fc16.x86_64
Oct 09 09:50:03 Updated: 1:cups-libs-1.5.0-15.fc16.i686
Oct 09 09:50:16 Installed: kernel-3.1.0-0.rc9.git0.0.fc16.x86_64
/var/log/audit/audit.log:
type=AVC msg=audit(1318179123.680:91): avc: denied { transition } for pid=13977 comm="rpm" path="/bin/bash" dev=dm-1 ino=261159 scontext=unconfined_u:system_r:bootloader_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:rpm_script_t:s0-s0:c0.c1023 tclass=process
type=SYSCALL msg=audit(1318179123.680:91): arch=c000003e syscall=59 success=yes exit=0 a0=18acb80 a1=15f7170 a2=7fff03766b68 a3=7fff03766260 items=0 ppid=13976 pid=13977 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts1 ses=1 comm="sh" exe="/bin/bash" subj=unconfined_u:system_r:rpm_script_t:s0-s0:c0.c1023 key=(null)
Do you have rpm running in a cron job? We should probably remove bootloader_run(unconfined_t, unconfined_r) No reason to transition that I can think of. (In reply to comment #6) > Do you have rpm running in a cron job? We should probably remove Nope, just sudo. What sudo command are you running? (In reply to comment #8) > What sudo command are you running? Just "yum update". Happened again with today's kernel-3.1.0-0.rc10.git0.1.fc16.x86_64 update.
type=AVC msg=audit(1319122932.807:165): avc: denied { transition } for pid=27996 comm="rpm" path="/bin/bash" dev=dm-1 ino=274487 scontext=unconfined_u:system_r:bootloader_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:rpm_script_t:s0-s0:c0.c1023 tclass=process
type=SYSCALL msg=audit(1319122932.807:165): arch=c000003e syscall=59 success=yes exit=0 a0=14f6f80 a1=15243b0 a2=7fff6a51ece8 a3=33323031632e30 items=0 ppid=27995 pid=27996 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts2 ses=1 comm="sh" exe="/bin/bash" subj=unconfined_u:system_r:rpm_script_t:s0-s0:c0.c1023 key=(null)
I paid closer attention today and it looks like this happens around %posttrans time.
Well we took away the transition from unconfined_t to bootloader_t in selinux-policy-3.10.0-43.fc16 Lets see if this fixes the problem. These are being caused by a bogus label on /sbin/new-kernel-pkg and /sbin/installkernel I have removed the labels and they should run as bin_t, this will stop the transition from rpm_t to bootloader_t when the kernel updates. Fixed in selinux-policy-3.10.0-47.fc16 If you just chcon -t bin_t /sbin/new-kernel-pkg /sbin/installkernel it should fix the problem, until the update arrives. With selinux-policy-3.10.0-48.fc16.noarch from koji I didn't get this AVC updating to kernel-3.1.0-1.fc16.x86_64. Thanks! selinux-policy-3.10.0-51.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/selinux-policy-3.10.0-51.fc16 Package selinux-policy-3.10.0-51.fc16: * should fix your issue, * was pushed to the Fedora 16 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-51.fc16' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2011-15029 then log in and leave karma (feedback). selinux-policy-3.10.0-51.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report. |
libreport version: 2.0.6 executable: /usr/bin/python hashmarkername: setroubleshoot kernel: 3.1.0-0.rc8.git0.0.fc16.x86_64 reason: SELinux is preventing /bin/bash from using the 'transition' accesses on a process. time: Wed Oct 5 00:12:05 2011 description: :SELinux is preventing /bin/bash from using the 'transition' accesses on a process. : :***** Plugin catchall (100. confidence) suggests *************************** : :If you believe that bash should be allowed transition access on processes labeled rpm_script_t 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 sh /var/log/audit/audit.log | audit2allow -M mypol :# semodule -i mypol.pp : :Additional Information: :Source Context unconfined_u:system_r:bootloader_t:s0-s0:c0.c1023 :Target Context unconfined_u:system_r:rpm_script_t:s0-s0:c0.c1023 :Target Objects /bin/bash [ process ] :Source sh :Source Path /bin/bash :Port <Unknown> :Host (removed) :Source RPM Packages bash-4.2.10-4.fc16 :Target RPM Packages bash-4.2.10-4.fc16 :Policy RPM selinux-policy-3.10.0-36.fc16 :Selinux Enabled True :Policy Type targeted :Enforcing Mode Enforcing :Host Name (removed) :Platform Linux (removed) : 3.1.0-0.rc8.git0.0.fc16.x86_64 #1 SMP Wed Sep 28 : 01:31:14 UTC 2011 x86_64 x86_64 :Alert Count 1 :First Seen Wed 05 Oct 2011 12:10:15 AM MST :Last Seen Wed 05 Oct 2011 12:10:15 AM MST :Local ID 3b3b6c06-8af4-44b9-a3e1-bd1476aa1653 : :Raw Audit Messages :type=AVC msg=audit(1317798615.853:129): avc: denied { transition } for pid=15112 comm="rpm" path="/bin/bash" dev=dm-1 ino=261249 scontext=unconfined_u:system_r:bootloader_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:rpm_script_t:s0-s0:c0.c1023 tclass=process : : :type=SYSCALL msg=audit(1317798615.853:129): arch=x86_64 syscall=execve success=yes exit=0 a0=e39fe0 a1=cfe380 a2=7fff99567238 a3=7fff99566930 items=0 ppid=15111 pid=15112 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts1 ses=1 comm=sh exe=/bin/bash subj=unconfined_u:system_r:rpm_script_t:s0-s0:c0.c1023 key=(null) : :Hash: sh,bootloader_t,rpm_script_t,process,transition : :audit2allow : :#============= bootloader_t ============== :allow bootloader_t rpm_script_t:process transition; : :audit2allow -R : :#============= bootloader_t ============== :allow bootloader_t rpm_script_t:process transition; :