Bug 567774

Podsumowanie:

SELinux is preventing /opt/real/RealPlayer/realplay.bin from loading
/opt/real/RealPlayer/codecs/drv2.so which requires text relocation.

Szczegółowy opis:

The realplay.bin application attempted to load
/opt/real/RealPlayer/codecs/drv2.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
/opt/real/RealPlayer/codecs/drv2.so to use relocation as a workaround, until the
library is fixed. Please file a bug report.

Zezwalanie na dostęp:

If you trust /opt/real/RealPlayer/codecs/drv2.so to run correctly, you can
change the file context to textrel_shlib_t. "chcon -t textrel_shlib_t
'/opt/real/RealPlayer/codecs/drv2.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 '/opt/real/RealPlayer/codecs/drv2.so'"

Polecenie naprawy:

chcon -t textrel_shlib_t '/opt/real/RealPlayer/codecs/drv2.so'

Dodatkowe informacje:

Kontekst źródłowy          unconfined_u:unconfined_r:unconfined_execmem_t:s0-
                              s0:c0.c1023
Kontekst docelowy             system_u:object_r:lib_t:s0
Obiekty docelowe              /opt/real/RealPlayer/codecs/drv2.so [ file ]
Źródło                     realplay.bin
Ścieżka źródłowa         /opt/real/RealPlayer/realplay.bin
Port                          <Nieznane>
Komputer                      (removed)
Źródłowe pakiety RPM       RealPlayer-11.0.1.1056-20081001
Docelowe pakiety RPM          RealPlayer-11.0.1.1056-20081001
Pakiet RPM polityki           selinux-policy-3.6.32-73.fc12
SELinux jest włączony       True
Typ polityki                  targeted
Tryb wymuszania               Enforcing
Nazwa wtyczki                 allow_execmod
Nazwa komputera               (removed)
Platforma                     Linux (removed)
                              2.6.31.12-174.2.3.fc12.i686 #1 SMP Mon Jan 18
                              20:22:46 UTC 2010 i686 i686
Liczba alarmów               4
Po raz pierwszy               nie, 31 sty 2010, 16:14:29
Po raz ostatni                nie, 31 sty 2010, 16:22:58
Lokalny identyfikator         7eb4dca7-d4ea-4b7b-90e3-40dd971df23d
Liczba wierszy                

Surowe komunikaty audytu      

node=(removed) type=AVC msg=audit(1264951378.954:57): avc:  denied  { execmod } for  pid=4367 comm="realplay.bin" path="/opt/real/RealPlayer/codecs/drv2.so" dev=dm-0 ino=5768436 scontext=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1264951378.954:57): arch=40000003 syscall=125 success=no exit=-13 a0=768e000 a1=2f000 a2=5 a3=bfca1280 items=0 ppid=4361 pid=4367 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="realplay.bin" exe="/opt/real/RealPlayer/realplay.bin" subj=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  allow_execmod,realplay.bin,unconfined_execmem_t,lib_t,file,execmod
audit2allow suggests:

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

allow unconfined_execmem_t lib_t:file execmod;