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On 07/12/2013 06:26 PM, Andy Ruch
wrote:
Hello,
I'm implementing a custom
policy based on ref policy for RHEL 6.3. I'm receiving the AVC
below when the system boots. Should I allow this? I was able
to find this related posting
( https://bugzilla.redhat.com/show_bug.cgi?id=431562) but it
was for an old version of iptables. Maybe ebtables has the
same type of bug?
type=PATH
msg=audit(07/12/2013 13:15:40.172:185) : item=1 name=(null)
inode=4912 dev=08:02 mode=file,755 ouid=root ogid=root
rdev=00:00 obj=system_u:object_r:ld_so_t:s0
type=PATH msg=audit(07/12/2013 13:15:40.172:185) : item=0
name=/sbin/modprobe inode=12835 dev=08:02 mode=file,755
ouid=root ogid=root rdev=00:00
obj=system_u:object_r:insmod_exec_t:s0
type=CWD msg=audit(07/12/2013 13:15:40.172:185) : cwd=/
type=EXECVE msg=audit(07/12/2013 13:15:40.172:185) : argc=2
a0=/sbin/modprobe a1=ebtables
type=SYSCALL msg=audit(07/12/2013 13:15:40.172:185) :
arch=x86_64 syscall=execve success=yes exit=0 a0=1078740
a1=7fffb5126460 a2=7fffb51266b0 a3=7fffb51261e0 items=2
ppid=2109 pid=2110 auid=unset uid=root gid=root euid=root
suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none)
ses=unset comm=modprobe exe=/sbin/modprobe
subj=system_u:system_r:insmod_t:s0-s0:c0.c1023 key=modules
type=AVC msg=audit(07/12/2013 13:15:40.172:185) : avc:
denied { read write } for pid=2110 comm=modprobe
path=socket:[16196] dev=sockfs ino=16196
scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=system_u:system_r:iptables_t:s0-s0:c0.c1023
tclass=rawip_socket
Thanks,
Andy Ruch
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Yes, this is a leak. Basically you can add dontaudit rules.
require{
type iptables_t;
type insmod_t;
}
dontaudit insmod_t iptables_t:rawip_socket { read write };
to your policy. We have dontaudit rules in Fedora.
Regards,
Miroslav
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