Created
July 11, 2012 13:05
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SELinux denials for xend in Fedora 17
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| Red Hat Bugzilla ticket made: https://bugzilla.redhat.com/show_bug.cgi?id=839287 | |
| [root@helium ~]# sealert -l b1392df4-dda4-4b82-914c-1e20c62fc898 | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| SELinux is preventing /usr/bin/python2.7 from read access on the file group. | |
| ***** Plugin xen_image (91.4 confidence) suggests ************************** | |
| If you want to allow python2.7 to have read access on the group file | |
| Then you need to change the label on 'group' | |
| Do | |
| # semanage fcontext -a -t xen_image_t 'group' | |
| # restorecon -v 'group' | |
| ***** Plugin catchall (9.59 confidence) suggests *************************** | |
| If you believe that python2.7 should be allowed read access on the group 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 xend /var/log/audit/audit.log | audit2allow -M mypol | |
| # semodule -i mypol.pp | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| Additional Information: | |
| Source Context system_u:system_r:xend_t:s0 | |
| Target Context system_u:object_r:passwd_file_t:s0 | |
| Target Objects group [ file ] | |
| Source xend | |
| Source Path /usr/bin/python2.7 | |
| Port <Unknown> | |
| Host helium.mhtx.net | |
| Source RPM Packages python-2.7.3-6.fc17.x86_64 | |
| Target RPM Packages | |
| Policy RPM selinux-policy-3.10.0-134.fc17.noarch | |
| Selinux Enabled True | |
| Policy Type targeted | |
| Enforcing Mode Enforcing | |
| Host Name helium.mhtx.net | |
| Platform Linux helium.mhtx.net 3.4.4-5.fc17.x86_64 #1 SMP | |
| Thu Jul 5 20:20:59 UTC 2012 x86_64 x86_64 | |
| Alert Count 2 | |
| First Seen Tue 10 Jul 2012 04:31:26 AM UTC | |
| Last Seen Tue 10 Jul 2012 04:38:27 AM UTC | |
| Local ID b1392df4-dda4-4b82-914c-1e20c62fc898 | |
| Raw Audit Messages | |
| type=AVC msg=audit(1341895107.913:435): avc: denied { read } for pid=2975 comm="xend" name="group" dev="dm-0" ino=917980 scontext=system_u:system_r:xend_t:s0 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file | |
| type=SYSCALL msg=audit(1341895107.913:435): arch=x86_64 syscall=open success=no exit=EACCES a0=7fa9b42966bf a1=80000 a2=1b6 a3=238 items=0 ppid=1 pid=2975 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=xend exe=/usr/bin/python2.7 subj=system_u:system_r:xend_t:s0 key=(null) | |
| Hash: xend,xend_t,passwd_file_t,file,read | |
| audit2allow | |
| #============= xend_t ============== | |
| #!!!! This avc is allowed in the current policy | |
| allow xend_t passwd_file_t:file read; | |
| audit2allow -R | |
| #============= xend_t ============== | |
| #!!!! This avc is allowed in the current policy | |
| allow xend_t passwd_file_t:file read; | |
| [root@helium ~]# sealert -l 3e09edc3-aeb7-49f5-96e1-d8148afda48f | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| SELinux is preventing /usr/bin/python2.7 from setattr access on the chr_file 1. | |
| ***** Plugin catchall (100. confidence) suggests *************************** | |
| If you believe that python2.7 should be allowed setattr access on the 1 chr_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 xend /var/log/audit/audit.log | audit2allow -M mypol | |
| # semodule -i mypol.pp | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| Additional Information: | |
| Source Context system_u:system_r:xend_t:s0 | |
| Target Context system_u:object_r:devpts_t:s0 | |
| Target Objects 1 [ chr_file ] | |
| Source xend | |
| Source Path /usr/bin/python2.7 | |
| Port <Unknown> | |
| Host helium.mhtx.net | |
| Source RPM Packages python-2.7.3-6.fc17.x86_64 | |
| Target RPM Packages | |
| Policy RPM selinux-policy-3.10.0-134.fc17.noarch | |
| Selinux Enabled True | |
| Policy Type targeted | |
| Enforcing Mode Enforcing | |
| Host Name helium.mhtx.net | |
| Platform Linux helium.mhtx.net 3.4.4-5.fc17.x86_64 #1 SMP | |
| Thu Jul 5 20:20:59 UTC 2012 x86_64 x86_64 | |
| Alert Count 2 | |
| First Seen Tue 10 Jul 2012 04:31:26 AM UTC | |
| Last Seen Tue 10 Jul 2012 04:38:27 AM UTC | |
| Local ID 3e09edc3-aeb7-49f5-96e1-d8148afda48f | |
| Raw Audit Messages | |
| type=AVC msg=audit(1341895107.913:436): avc: denied { setattr } for pid=2975 comm="xend" name="1" dev="devpts" ino=4 scontext=system_u:system_r:xend_t:s0 tcontext=system_u:object_r:devpts_t:s0 tclass=chr_file | |
| type=SYSCALL msg=audit(1341895107.913:436): arch=x86_64 syscall=chown success=no exit=EACCES a0=7fa9acff2ce0 a1=0 a2=0 a3=238 items=0 ppid=1 pid=2975 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=xend exe=/usr/bin/python2.7 subj=system_u:system_r:xend_t:s0 key=(null) | |
| Hash: xend,xend_t,devpts_t,chr_file,setattr | |
| audit2allow | |
| #============= xend_t ============== | |
| #!!!! This avc is allowed in the current policy | |
| allow xend_t devpts_t:chr_file setattr; | |
| audit2allow -R | |
| #============= xend_t ============== | |
| #!!!! This avc is allowed in the current policy | |
| allow xend_t devpts_t:chr_file setattr; | |
| [root@helium ~]# sealert -l 86395f09-5f33-4f66-8d02-519b61e54139 | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| SELinux is preventing /usr/bin/python2.7 from execute access on the file pt_chown. | |
| ***** Plugin leaks (86.2 confidence) suggests ****************************** | |
| If you want to ignore python2.7 trying to execute access the pt_chown file, because you believe it should not need this access. | |
| Then you should report this as a bug. | |
| You can generate a local policy module to dontaudit this access. | |
| Do | |
| # grep /usr/bin/python2.7 /var/log/audit/audit.log | audit2allow -D -M mypol | |
| # semodule -i mypol.pp | |
| ***** Plugin catchall (14.7 confidence) suggests *************************** | |
| If you believe that python2.7 should be allowed execute access on the pt_chown 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 xend /var/log/audit/audit.log | audit2allow -M mypol | |
| # semodule -i mypol.pp | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| WARNING: Policy would be downgraded from version 27 to 26. | |
| Additional Information: | |
| Source Context system_u:system_r:xend_t:s0 | |
| Target Context system_u:object_r:ptchown_exec_t:s0 | |
| Target Objects pt_chown [ file ] | |
| Source xend | |
| Source Path /usr/bin/python2.7 | |
| Port <Unknown> | |
| Host helium.mhtx.net | |
| Source RPM Packages python-2.7.3-6.fc17.x86_64 | |
| Target RPM Packages | |
| Policy RPM selinux-policy-3.10.0-134.fc17.noarch | |
| Selinux Enabled True | |
| Policy Type targeted | |
| Enforcing Mode Enforcing | |
| Host Name helium.mhtx.net | |
| Platform Linux helium.mhtx.net 3.4.4-5.fc17.x86_64 #1 SMP | |
| Thu Jul 5 20:20:59 UTC 2012 x86_64 x86_64 | |
| Alert Count 2 | |
| First Seen Tue 10 Jul 2012 04:31:26 AM UTC | |
| Last Seen Tue 10 Jul 2012 04:38:27 AM UTC | |
| Local ID 86395f09-5f33-4f66-8d02-519b61e54139 | |
| Raw Audit Messages | |
| type=AVC msg=audit(1341895107.920:437): avc: denied { execute } for pid=2976 comm="xend" name="pt_chown" dev="dm-0" ino=1966878 scontext=system_u:system_r:xend_t:s0 tcontext=system_u:object_r:ptchown_exec_t:s0 tclass=file | |
| type=SYSCALL msg=audit(1341895107.920:437): arch=x86_64 syscall=execve success=no exit=EACCES a0=7fa9c276af2e a1=7fa9acff0770 a2=0 a3=19 items=0 ppid=953 pid=2976 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=xend exe=/usr/bin/python2.7 subj=system_u:system_r:xend_t:s0 key=(null) | |
| Hash: xend,xend_t,ptchown_exec_t,file,execute | |
| audit2allow | |
| #============= xend_t ============== | |
| #!!!! This avc is allowed in the current policy | |
| allow xend_t ptchown_exec_t:file execute; | |
| audit2allow -R | |
| #============= xend_t ============== | |
| #!!!! This avc is allowed in the current policy | |
| allow xend_t ptchown_exec_t:file execute; | |
| [root@helium ~]# |
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If you're stumbling upon this via a google search, the bug at Red Hat is here: