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[Launchpad Bug Tracker <1660836@xxxxxxxxxxxxxxxxxx>]

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.bader@xxxxxxxxxxxxx>  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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