Bug 666739
| Summary: | SELinux is preventing /usr/bin/xsane from using the 'execstack' accesses on a process. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Romain DEP. <rom1dep> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED DUPLICATE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 14 | CC: | dwalsh, mgrepl |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | setroubleshoot_trace_hash:7e1a77c043a61dddaaf8951c5ee8a6e49ac9838a5972dcd1973a7faec1e1a731 | ||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-01-03 16:52:10 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
I was about to try to use xsane with my samsung scx-3200 printer/scanner when this happened. Plus, when I run the proposed cmdline, I get : [root@NetSamFed rom1dep]# grep /usr/bin/xsane /var/log/audit/audit.log | audit2allow -M mypol compilation failed: mypol.te:6:ERROR 'syntax error' at token '' on line 6: /usr/bin/checkmodule: error(s) encountered while parsing configuration /usr/bin/checkmodule: loading policy configuration from mypol.te annoying.. Turn on the "allow_execstack" boolean setsebool -P allow_execstack 1 *** This bug has been marked as a duplicate of bug 665505 *** |
SELinux is preventing /usr/bin/xsane from using the 'execstack' accesses on a process. ***** Plugin allow_execstack (53.1 confidence) suggests ******************** If you do not think /usr/bin/xsane should need to map stack memory that is both writable and executable. Then you need to report a bug. This is a potentially dangerous access. Do contact your security administrator and report this issue. ***** Plugin catchall_boolean (42.6 confidence) suggests ******************* If you want to allow unconfined executables to make their stack executable. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla Then you must tell SELinux about this by enabling the 'allow_execstack' boolean. Do setsebool -P allow_execstack 1 ***** Plugin catchall (5.76 confidence) suggests *************************** If you believe that xsane should be allowed execstack access on processes labeled unconfined_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 /usr/bin/xsane /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Objects Unknown [ process ] Source xsane Source Path /usr/bin/xsane Port <Inconnu> Host (removed) Source RPM Packages xsane-0.998-1.fc14 Target RPM Packages Policy RPM selinux-policy-3.9.7-19.fc14 Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 2.6.35.10-74.fc14.i686 #1 SMP Thu Dec 23 16:17:40 UTC 2010 i686 i686 Alert Count 1 First Seen dim. 02 janv. 2011 21:12:59 CET Last Seen dim. 02 janv. 2011 21:12:59 CET Local ID ea4d4832-31a7-45f2-b6cc-f7a401df316e Raw Audit Messages type=AVC msg=audit(1293999179.327:22018): avc: denied { execstack } for pid=17910 comm="xsane" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process xsane,unconfined_t,unconfined_t,process,execstack type=SYSCALL msg=audit(1293999179.327:22018): arch=i386 syscall=mprotect success=no exit=EACCES a0=bfd2e000 a1=1000 a2=1000007 a3=bfd278e0 items=0 ppid=7692 pid=17910 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=pts0 ses=18 comm=xsane exe=/usr/bin/xsane subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null) xsane,unconfined_t,unconfined_t,process,execstack #============= unconfined_t ============== #!!!! This avc can be allowed using the boolean 'allow_execstack' allow unconfined_t self:process execstack;