Bug 560305

Summary:

SELinux is preventing /lib/ld-2.11.1.so from loading
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so which
requires text relocation.

Detailed Description:

The ld-linux.so.2 application attempted to load
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so which
requires text relocation. This is a potential security problem. Most libraries
do not need this permission. Libraries are sometimes coded incorrectly and
request this permission. The SELinux Memory Protection Tests
(http://people.redhat.com/drepper/selinux-mem.html) web page explains how to
remove this requirement. You can configure SELinux temporarily to allow
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so to use
relocation as a workaround, until the library is fixed. Please file a bug
report.

Allowing Access:

If you trust /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so
to run correctly, you can change the file context to textrel_shlib_t. "chcon -t
textrel_shlib_t
'/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so'" You must
also change the default file context files on the system in order to preserve
them even on a full relabel. "semanage fcontext -a -t textrel_shlib_t
'/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so'"

Fix Command:

chcon -t textrel_shlib_t
'/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so'

Additional Information:

Source Context                system_u:system_r:prelink_t:s0-s0:c0.c1023
Target Context                unconfined_u:object_r:user_home_t:s0
Target Objects                /usr/lib/oracle/xe/app/oracle/product/10.2.0/serve
                              r/lib/libnnz10.so [ file ]
Source                        ld-linux.so.2
Source Path                   /lib/ld-2.11.1.so
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           glibc-2.11.1-1
Target RPM Packages           oracle-xe-10.2.0.1-1.0
Policy RPM                    selinux-policy-3.6.32-73.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   allow_execmod
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31.12-174.2.3.fc12.i686.PAE #1 SMP
                              Mon Jan 18 20:06:44 UTC 2010 i686 athlon
Alert Count                   1
First Seen                    Sat 30 Jan 2010 04:40:51 PM EST
Last Seen                     Sat 30 Jan 2010 04:40:51 PM EST
Local ID                      3f3a6807-619d-4ca3-98f0-61c1e67a24ea
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1264887651.562:32): avc:  denied  { execmod } for  pid=4218 comm="ld-linux.so.2" path="/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so" dev=sda5 ino=659647 scontext=system_u:system_r:prelink_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1264887651.562:32): arch=40000003 syscall=125 success=no exit=-13 a0=ab3000 a1=1dd000 a2=5 a3=bfc9e030 items=0 ppid=2894 pid=4218 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=2 comm="ld-linux.so.2" exe="/lib/ld-2.11.1.so" subj=system_u:system_r:prelink_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-73.fc12,allow_execmod,ld-linux.so.2,prelink_t,user_home_t,file,execmod
audit2allow suggests:

#============= prelink_t ==============
#!!!! This avc can be allowed using the boolean 'allow_execmod'

allow prelink_t user_home_t:file execmod;