This bug was fixed in the package linux - 4.8.0-45.48
---------------
linux (4.8.0-45.48) yakkety; urgency=low
* CVE-2017-7184
- xfrm_user: validate XFRM_MSG_NEWAE XFRMA_REPLAY_ESN_VAL replay_window
- xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder
-- Stefan Bader <stefan.ba...@canonical.com> Fri, 24 Mar 2017 12:03:39
+0100
** Changed in: linux (Ubuntu Yakkety)
Status: Triaged => Fix Released
** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2017-7184
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https://bugs.launchpad.net/bugs/1660836
Title:
apparmor auditing denied access of special apparmor .null fi\ le
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Triaged
Status in linux source package in Yakkety:
Fix Released
Status in linux source package in Zesty:
Fix Released
Bug description:
When an fd is disallowed from being inherited during exec, instead of
closed it is duped to a special apparmor/.null file. This prevents the
fd from being reused by another file in case the application expects
the original file on a give fd (eg stdin/stdout etc). This results in
a denial message like
[32375.561535] audit: type=1400 audit(1478825963.441:358): apparmor="DENIED"
op\
eration="file_inherit" namespace="root//lxd-t_<var-lib-lxd>"
profile="/sbin/dhc\
lient" name="/dev/pts/1" pid=16795 comm="dhclient" requested_mask="wr"
denied_m\
ask="wr" fsuid=165536 ouid=165536
Further access to the fd is resultin in the rather useless denial message
of
[32375.566820] audit: type=1400 audit(1478825963.445:359): apparmor="DENIED"
op\
eration="file_perm" namespace="root//lxd-t_<var-lib-lxd>"
profile="/sbin/dhclie\
nt" name="/apparmor/.null" pid=16795 comm="dhclient" requested_mask="w"
denied_\
mask="w" fsuid=165536 ouid=0
since we have the original denial, the noisy and useless .null based
denials can be skipped.
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