| Summary: | SELinux is preventing /usr/lib/nspluginwrapper/npviewer.bin from 'execmod' accesses on the file /usr/lib/flash-plugin/libflashplayer.so. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Patrick C. F. Ernzer <pcfe> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 15 | CC: | dominick.grift, dwalsh, mgrepl |
| Target Milestone: | --- | Keywords: | Reopened |
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | setroubleshoot_trace_hash:f0c0682990d508e31c59ad82df56d14b80f3692bf9f30acfba0e236e0eb79537 | ||
| Fixed In Version: | selinux-policy-3.9.16-48.fc15 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-12-04 02:38:09 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Bug Depends On: | |||
| Bug Blocks: | 494832 | ||
The alert tells you what to do.# restorecon -v '/usr/lib/flash-plugin/libflashplayer.so' sorry, no; [root@machine ~]# ls -lZ /usr/lib/flash-plugin/libflashplayer.so -rwxr-xr-x. root root system_u:object_r:lib_t:s0 /usr/lib/flash-plugin/libflashplayer.so [root@machine ~]# restorecon -v /usr/lib/flash-plugin/libflashplayer.so [root@machine ~]# ls -lZ /usr/lib/flash-plugin/libflashplayer.so -rwxr-xr-x. root root system_u:object_r:lib_t:s0 /usr/lib/flash-plugin/libflashplayer.so [pcfe@machine ~]$ sandbox -t sandbox_web_t -i /home/pcfe/.mozilla/firefox/2t6fot86.for_sandbox -w 1600x1118 -W metacity -X firefox http://www.youtube.com then get to any video (and do not long in so you do not potentially end up in the html5 view) type=AVC msg=audit(1320157342.486:3805): avc: denied { execmod } for pid=23869 comm="npviewer.bin" path="/usr/lib/flash-plugin/libflashplayer.so" dev=dm-1 ino=37813 scontext=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c667,c725 tcontext=system_u:object_r:lib_t:s0 tclass=file type=SYSCALL msg=audit(1320157342.486:3805): arch=40000003 syscall=125 per=8 success=no exit=-13 a0=d23000 a1=fc7000 a2=5 a3=fff37680 items=0 ppid=23787 pid=23869 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="npviewer.bin" exe="/usr/lib/nspluginwrapper/npviewer.bin" subj=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c667,c725 key=(null) Note, this is only a problem in the sandbox. In non-sandboxed Firefox, the plugin works fine. chcon -t textrel_shlib_t '/usr/lib/flash-plugin/libflashplayer.so' Yupp, that works. Both with and without sandbox. Thanks. Should this be adjusted in the default policy (presuming it is not already) or should I try and open a bug with Adobe? Yes we bring this label back everyother adobe release... selinux-policy-3.9.16-48.fc15 has been submitted as an update for Fedora 15. https://admin.fedoraproject.org/updates/selinux-policy-3.9.16-48.fc15 Package selinux-policy-3.9.16-48.fc15: * should fix your issue, * was pushed to the Fedora 15 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.9.16-48.fc15' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2011-16023/selinux-policy-3.9.16-48.fc15 then log in and leave karma (feedback). selinux-policy-3.9.16-48.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report. |
SELinux is preventing /usr/lib/nspluginwrapper/npviewer.bin from 'execmod' accesses on the file /usr/lib/flash-plugin/libflashplayer.so. ***** Plugin allow_execmod (91.4 confidence) suggests ********************** If you want to allow npviewer.bin to have execmod access on the libflashplayer.so file Then you need to change the label on '/usr/lib/flash-plugin/libflashplayer.so' Do # semanage fcontext -a -t textrel_shlib_t '/usr/lib/flash-plugin/libflashplayer.so' # restorecon -v '/usr/lib/flash-plugin/libflashplayer.so' ***** Plugin catchall (9.59 confidence) suggests *************************** If you believe that npviewer.bin should be allowed execmod access on the libflashplayer.so 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 npviewer.bin /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context unconfined_u:unconfined_r:sandbox_web_client_t:s0: c599,c771 Target Context system_u:object_r:lib_t:s0 Target Objects /usr/lib/flash-plugin/libflashplayer.so [ file ] Source npviewer.bin Source Path /usr/lib/nspluginwrapper/npviewer.bin Port <Unknown> Host (removed) Source RPM Packages nspluginwrapper-1.4.4-1.fc15 Target RPM Packages flash-plugin-11.0.1.152-release Policy RPM selinux-policy-3.9.16-39.fc15 Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 2.6.40.6-0.fc15.x86_64 #1 SMP Tue Oct 4 00:39:50 UTC 2011 x86_64 x86_64 Alert Count 1 First Seen Wed 26 Oct 2011 21:35:19 EEST Last Seen Wed 26 Oct 2011 21:35:19 EEST Local ID eaed1ace-ccbf-4655-92c3-a33862f0806b Raw Audit Messages type=AVC msg=audit(1319654119.891:1067): avc: denied { execmod } for pid=5433 comm="npviewer.bin" path="/usr/lib/flash-plugin/libflashplayer.so" dev=dm-1 ino=37813 scontext=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c599,c771 tcontext=system_u:object_r:lib_t:s0 tclass=file type=SYSCALL msg=audit(1319654119.891:1067): arch=i386 syscall=capget per=8 success=no exit=EACCES a0=8c1000 a1=fc7000 a2=5 a3=ff899070 items=0 ppid=5349 pid=5433 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm=npviewer.bin exe=/usr/lib/nspluginwrapper/npviewer.bin subj=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c599,c771 key=(null) Hash: npviewer.bin,sandbox_web_client_t,lib_t,file,execmod audit2allow #============= sandbox_web_client_t ============== allow sandbox_web_client_t lib_t:file execmod; audit2allow -R #============= sandbox_web_client_t ============== allow sandbox_web_client_t lib_t:file execmod; Flash applets are a good thing to run in a sandbox. Can we please enable this access by default? Or is there a risk this access would surprise the user by not containing the flash as tightly as expected?