avc denials: nspluginscan, file_t, gconfd?
Antonio Olivares
olivares14031 at yahoo.com
Thu May 22 16:52:45 UTC 2008
Dear all,
I got a setroubleshoot popop on the laptop. I am
attaching them here:
Advice/suggestions/comments greatly appreciated.
TIA,
Antonio
Summary:
SELinux is preventing nspluginscan from making the
program stack executable.
Detailed Description:
The nspluginscan application attempted to make its
stack executable. This is a
potential security problem. This should never ever be
necessary. Stack memory is
not executable on most OSes these days and this will
not change. Executable
stack memory is one of the biggest security problems.
An execstack error might
in fact be most likely raised by malicious code.
Applications 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. If nspluginscan does not
work and you need it to
work, you can configure SELinux temporarily to allow
this access until the
application is fixed. Please file a bug report
(http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.
Allowing Access:
Sometimes a library is accidentally marked with the
execstack flag, if you find
a library with this flag you can clear it with the
execstack -c LIBRARY_PATH.
Then retry your application. If the app continues to
not work, you can turn the
flag back on with execstack -s LIBRARY_PATH.
Otherwise, if you trust
nspluginscan to run correctly, you can change the
context of the executable to
unconfined_execmem_exec_t. "chcon -t
unconfined_execmem_exec_t
'/usr/bin/nspluginscan'" 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 unconfined_execmem_exec_t
'/usr/bin/nspluginscan'"
Fix Command:
chcon -t unconfined_execmem_exec_t
'/usr/bin/nspluginscan'
Additional Information:
Source Context
unconfined_u:unconfined_r:unconfined_t:SystemLow-
SystemHigh
Target Context
unconfined_u:unconfined_r:unconfined_t:SystemLow-
SystemHigh
Target Objects None [ process ]
Source nspluginscan
Source Path /usr/bin/nspluginscan
Port <Unknown>
Host localhost.localdomain
Source RPM Packages kdebase-4.0.3-9.fc9
Target RPM Packages
Policy RPM
selinux-policy-3.3.1-45.fc10
Selinux Enabled True
Policy Type targeted
MLS Enabled True
Enforcing Mode Enforcing
Plugin Name allow_execstack
Host Name localhost.localdomain
Platform Linux
localhost.localdomain
2.6.26-0.17.rc3.fc10.i686 #1 SMP Sun May 18
19:05:03 EDT 2008 i686
i686
Alert Count 11
First Seen Tue 05 Feb 2008 07:13:02
AM CST
Last Seen Wed 21 May 2008 08:23:12
AM CDT
Local ID
7afb3a36-5b69-486c-a93b-02e714040250
Line Numbers
Raw Audit Messages
host=localhost.localdomain type=AVC
msg=audit(1211376192.783:89): avc: denied {
execstack } for pid=3177 comm="nspluginscan"
scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
tclass=process
host=localhost.localdomain type=SYSCALL
msg=audit(1211376192.783:89): arch=40000003
syscall=125 success=no exit=-13 a0=bfeee000 a1=1000
a2=1000007 a3=fffff000 items=0 ppid=3166 pid=3177
auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500
egid=500 sgid=500 fsgid=500 tty=(none) ses=1
comm="nspluginscan" exe="/usr/bin/nspluginscan"
subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
key=(null)
Summary:
SELinux is preventing nm-system-setti
(NetworkManager_t) "read" to
./PolicyKit.reload (system_crond_var_lib_t).
Detailed Description:
SELinux denied access requested by nm-system-setti. It
is not expected that this
access is required by nm-system-setti and this access
may signal an intrusion
attempt. It is also possible that the specific version
or configuration of the
application is causing it to require additional
access.
Allowing Access:
Sometimes labeling problems can cause SELinux denials.
You could try to restore
the default system file context for
./PolicyKit.reload,
restorecon -v './PolicyKit.reload'
If this does not work, there is currently no automatic
way to allow this access.
Instead, you can generate a local policy module to
allow this access - see FAQ
(http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385)
Or you can disable
SELinux protection altogether. Disabling SELinux
protection is not recommended.
Please file a bug report
(http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.
Additional Information:
Source Context
system_u:system_r:NetworkManager_t:SystemLow-
SystemHigh
Target Context
system_u:object_r:system_crond_var_lib_t
Target Objects ./PolicyKit.reload [
file ]
Source nm-system-setti
Source Path
/usr/sbin/nm-system-settings
Port <Unknown>
Host localhost.localdomain
Source RPM Packages
NetworkManager-0.7.0-0.9.3.svn3675.fc10
Target RPM Packages
Policy RPM
selinux-policy-3.3.1-45.fc10
Selinux Enabled True
Policy Type targeted
MLS Enabled True
Enforcing Mode Enforcing
Plugin Name catchall_file
Host Name localhost.localdomain
Platform Linux
localhost.localdomain
2.6.26-0.17.rc3.fc10.i686 #1 SMP Sun May 18
19:05:03 EDT 2008 i686
i686
Alert Count 3
First Seen Wed 21 May 2008 08:21:22
AM CDT
Last Seen Thu 22 May 2008 06:51:05
AM CDT
Local ID
842c746b-258d-45ad-bb2e-22c271d0b9ef
Line Numbers
Raw Audit Messages
host=localhost.localdomain type=AVC
msg=audit(1211457065.391:7): avc: denied { read }
for pid=2501 comm="nm-system-setti"
name="PolicyKit.reload" dev=dm-0 ino=443096
scontext=system_u:system_r:NetworkManager_t:s0-s0:c0.c1023
tcontext=system_u:object_r:system_crond_var_lib_t:s0
tclass=file
host=localhost.localdomain type=SYSCALL
msg=audit(1211457065.391:7): arch=40000003 syscall=292
success=no exit=-13 a0=6 a1=75d620 a2=106 a3=9b81f20
items=0 ppid=2500 pid=2501 auid=4294967295 uid=0 gid=0
euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none)
ses=4294967295 comm="nm-system-setti"
exe="/usr/sbin/nm-system-settings"
subj=system_u:system_r:NetworkManager_t:s0-s0:c0.c1023
key=(null)
Summary:
SELinux is preventing nm-system-setti
(NetworkManager_t) "getattr" to /dev/root
(fixed_disk_device_t).
Detailed Description:
SELinux denied access requested by nm-system-setti. It
is not expected that this
access is required by nm-system-setti and this access
may signal an intrusion
attempt. It is also possible that the specific version
or configuration of the
application is causing it to require additional
access.
Allowing Access:
Sometimes labeling problems can cause SELinux denials.
You could try to restore
the default system file context for /dev/root,
restorecon -v '/dev/root'
If this does not work, there is currently no automatic
way to allow this access.
Instead, you can generate a local policy module to
allow this access - see FAQ
(http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385)
Or you can disable
SELinux protection altogether. Disabling SELinux
protection is not recommended.
Please file a bug report
(http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.
Additional Information:
Source Context
system_u:system_r:NetworkManager_t:SystemLow-
SystemHigh
Target Context
system_u:object_r:fixed_disk_device_t
Target Objects /dev/root [ blk_file ]
Source nm-system-setti
Source Path
/usr/sbin/nm-system-settings
Port <Unknown>
Host localhost.localdomain
Source RPM Packages
NetworkManager-0.7.0-0.9.3.svn3675.fc10
Target RPM Packages
Policy RPM
selinux-policy-3.3.1-45.fc10
Selinux Enabled True
Policy Type targeted
MLS Enabled True
Enforcing Mode Enforcing
Plugin Name catchall_file
Host Name localhost.localdomain
Platform Linux
localhost.localdomain
2.6.26-0.17.rc3.fc10.i686 #1 SMP Sun May 18
19:05:03 EDT 2008 i686
i686
Alert Count 3
First Seen Wed 21 May 2008 08:21:23
AM CDT
Last Seen Thu 22 May 2008 06:51:07
AM CDT
Local ID
12a9ceb6-2b80-406f-86ce-eddd56016c6b
Line Numbers
Raw Audit Messages
host=localhost.localdomain type=AVC
msg=audit(1211457067.143:8): avc: denied { getattr }
for pid=2501 comm="nm-system-setti" path="/dev/root"
dev=tmpfs ino=402
scontext=system_u:system_r:NetworkManager_t:s0-s0:c0.c1023
tcontext=system_u:object_r:fixed_disk_device_t:s0
tclass=blk_file
host=localhost.localdomain type=SYSCALL
msg=audit(1211457067.143:8): arch=40000003 syscall=195
success=no exit=-13 a0=415283d a1=bff720ec a2=3d8fff4
a3=415283d items=0 ppid=1 pid=2501 auid=4294967295
uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0
fsgid=0 tty=(none) ses=4294967295
comm="nm-system-setti"
exe="/usr/sbin/nm-system-settings"
subj=system_u:system_r:NetworkManager_t:s0-s0:c0.c1023
key=(null)
Summary:
SELinux is preventing dbus-daemon (xdm_dbusd_t)
"execute" to ./gconfd-2
(gconfd_exec_t).
Detailed Description:
SELinux denied access requested by dbus-daemon. It is
not expected that this
access is required by dbus-daemon and this access may
signal an intrusion
attempt. It is also possible that the specific version
or configuration of the
application is causing it to require additional
access.
Allowing Access:
Sometimes labeling problems can cause SELinux denials.
You could try to restore
the default system file context for ./gconfd-2,
restorecon -v './gconfd-2'
If this does not work, there is currently no automatic
way to allow this access.
Instead, you can generate a local policy module to
allow this access - see FAQ
(http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385)
Or you can disable
SELinux protection altogether. Disabling SELinux
protection is not recommended.
Please file a bug report
(http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.
Additional Information:
Source Context
system_u:system_r:xdm_dbusd_t:SystemLow-SystemHigh
Target Context
system_u:object_r:gconfd_exec_t
Target Objects ./gconfd-2 [ file ]
Source dbus-daemon
Source Path /bin/dbus-daemon
Port <Unknown>
Host localhost.localdomain
Source RPM Packages dbus-1.2.1-3.fc10
Target RPM Packages
Policy RPM
selinux-policy-3.3.1-45.fc10
Selinux Enabled True
Policy Type targeted
MLS Enabled True
Enforcing Mode Enforcing
Plugin Name catchall_file
Host Name localhost.localdomain
Platform Linux
localhost.localdomain
2.6.26-0.17.rc3.fc10.i686 #1 SMP Sun May 18
19:05:03 EDT 2008 i686
i686
Alert Count 401
First Seen Wed 21 May 2008 08:21:39
AM CDT
Last Seen Thu 22 May 2008 06:55:49
AM CDT
Local ID
3d366e28-6abd-4740-b078-7ec3f331bce5
Line Numbers
Raw Audit Messages
host=localhost.localdomain type=AVC
msg=audit(1211457349.146:165): avc: denied { execute
} for pid=3544 comm="dbus-daemon" name="gconfd-2"
dev=dm-0 ino=125235
scontext=system_u:system_r:xdm_dbusd_t:s0-s0:c0.c1023
tcontext=system_u:object_r:gconfd_exec_t:s0
tclass=file
host=localhost.localdomain type=SYSCALL
msg=audit(1211457349.146:165): arch=40000003
syscall=11 success=no exit=-13 a0=b8ed76f0 a1=b8edffa8
a2=b8ede8f8 a3=b8edbb58 items=0 ppid=3543 pid=3544
auid=4294967295 uid=42 gid=42 euid=42 suid=42 fsuid=42
egid=42 sgid=42 fsgid=42 tty=(none) ses=4294967295
comm="dbus-daemon" exe="/bin/dbus-daemon"
subj=system_u:system_r:xdm_dbusd_t:s0-s0:c0.c1023
key=(null)
Summary:
SELinux is preventing access to files with the label,
file_t.
Detailed Description:
SELinux permission checks on files labeled file_t are
being denied. file_t is
the context the SELinux kernel gives to files that do
not have a label. This
indicates a serious labeling problem. No files on an
SELinux box should ever be
labeled file_t. If you have just added a new disk
drive to the system you can
relabel it using the restorecon command. Otherwise you
should relabel the entire
files system.
Allowing Access:
You can execute the following command as root to
relabel your computer system:
"touch /.autorelabel; reboot"
Additional Information:
Source Context
system_u:system_r:tmpreaper_t
Target Context system_u:object_r:file_t
Target Objects ./kpc [ dir ]
Source tmpwatch
Source Path /usr/sbin/tmpwatch
Port <Unknown>
Host localhost.localdomain
Source RPM Packages tmpwatch-2.9.13-2
Target RPM Packages
Policy RPM
selinux-policy-3.3.1-45.fc10
Selinux Enabled True
Policy Type targeted
MLS Enabled True
Enforcing Mode Enforcing
Plugin Name file
Host Name localhost.localdomain
Platform Linux
localhost.localdomain
2.6.26-0.17.rc3.fc10.i686 #1 SMP Sun May 18
19:05:03 EDT 2008 i686
i686
Alert Count 12
First Seen Thu 28 Feb 2008 08:12:12
AM CST
Last Seen Thu 22 May 2008 08:15:01
AM CDT
Local ID
78c39dd1-e417-40e6-8056-ac3a90e9e235
Line Numbers
Raw Audit Messages
host=localhost.localdomain type=AVC
msg=audit(1211462101.317:204): avc: denied { read }
for pid=14967 comm="tmpwatch" name="kpc" dev=dm-0
ino=885859 scontext=system_u:system_r:tmpreaper_t:s0
tcontext=system_u:object_r:file_t:s0 tclass=dir
host=localhost.localdomain type=SYSCALL
msg=audit(1211462101.317:204): arch=40000003 syscall=5
success=no exit=-13 a0=804ac62 a1=98800 a2=0 a3=0
items=0 ppid=14964 pid=14967 auid=4294967295 uid=0
gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0
tty=(none) ses=4294967295 comm="tmpwatch"
exe="/usr/sbin/tmpwatch"
subj=system_u:system_r:tmpreaper_t:s0 key=(null)
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