Today's rawhide -- SELinux is preventing /usr/lib/firefox-2.0.0.3/firefox-bin from loading /usr/lib/mozilla/plugins/libvlcplugin.so which requires text relocation.

Miles Lane miles.lane at gmail.com
Tue May 15 23:46:33 UTC 2007


Summary
    SELinux is preventing /usr/lib/firefox-2.0.0.3/firefox-bin from loading
    /usr/lib/mozilla/plugins/libvlcplugin.so which requires text relocation.

Detailed Description
    The /usr/lib/firefox-2.0.0.3/firefox-bin application attempted to load
    /usr/lib/mozilla/plugins/libvlcplugin.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 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/mozilla/plugins/libvlcplugin.so to use
    relocation as a workaround, until the library is fixed. Please file a
    http://bugzilla.redhat.com/bugzilla/enter_bug.cgi against this package.

Allowing Access
    If you trust /usr/lib/mozilla/plugins/libvlcplugin.so to run correctly, you
    can change the file context to textrel_shlib_t. "chcon -t textrel_shlib_t
    /usr/lib/mozilla/plugins/libvlcplugin.so"

    The following command will allow this access:
    chcon -t textrel_shlib_t /usr/lib/mozilla/plugins/libvlcplugin.so

Additional Information

Source Context                user_u:system_r:unconfined_t
Target Context                system_u:object_r:lib_t
Target Objects                /usr/lib/mozilla/plugins/libvlcplugin.so [ file ]
Affected RPM Packages         firefox-2.0.0.3-4.fc7 [application]mozilla-
                              vlc-0.8.6b-4.lvn7 [target]
Policy RPM                    selinux-policy-2.6.1-1.fc7
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   plugins.allow_execmod
Host Name                     localhost.localdomain
Platform                      Linux localhost.localdomain 2.6.21-1.3142.fc7 #1
                              SMP Mon May 7 21:14:09 EDT 2007 i686 athlon
Alert Count                   2
First Seen                    Tue 15 May 2007 04:45:15 PM PDT
Last Seen                     Tue 15 May 2007 04:45:15 PM PDT
Local ID                      6c433235-3c30-4667-9fcb-fb442d89ded0
Line Numbers

Raw Audit Messages

avc: denied { execmod } for comm="firefox-bin" dev=sda5 egid=500 euid=500
exe="/usr/lib/firefox-2.0.0.3/firefox-bin" exit=-13 fsgid=500 fsuid=500 gid=500
items=0 name="libvlcplugin.so" path="/usr/lib/mozilla/plugins/libvlcplugin.so"
pid=4856 scontext=user_u:system_r:unconfined_t:s0 sgid=500
subj=user_u:system_r:unconfined_t:s0 suid=500 tclass=file
tcontext=system_u:object_r:lib_t:s0 tty=(none) uid=500




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