CVE-2016-1575

Priority
Medium
Description
The overlayfs implementation in the Linux kernel through 4.5.2 does not
properly maintain POSIX ACL xattr data, which allows local users to gain
privileges by leveraging a group-writable setgid directory.
Ubuntu-Description
halfdog discovered that OverlayFS in the Linux kernel incorrectly
propagated security sensitive extended attributes, such as POSIX ACLs. A
local unprivileged attacker could use this to gain privileges.
References
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1575
http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/
http://www.ubuntu.com/usn/usn-2910-1
http://www.ubuntu.com/usn/usn-2908-3
http://www.ubuntu.com/usn/usn-2908-1
http://www.ubuntu.com/usn/usn-2907-1
http://www.ubuntu.com/usn/usn-2909-1
http://www.ubuntu.com/usn/usn-2907-2
http://www.ubuntu.com/usn/usn-2908-2
Bugs
https://launchpad.net/bugs/1534961
Notes
 jdstrand> android kernels (flo, goldfish, grouper, maguro, mako and manta) are
  not supported on the Ubuntu Touch 14.10 and earlier preview kernels
 jdstrand> linux-lts-saucy no longer receives official support
 jdstrand> linux-lts-quantal no longer receives official support
 sbeattie> precise does not allow unprivileged user namespaces,
  which is what lets an unprivileged user exploit this vulnerability;
  however, the issue of copying up setuid attributes still exists in
  the overlayfs codebase here, but it is a much lower priority to fix
  (needs root/CAP_SYS_ADMIN to exploit).
Package
Source: linux-lts-trusty (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):released (3.13.0-79.123~precise1)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-lts-wily (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):released (4.2.0-30.35~14.04.1)
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source tree: https://github.com/bq/aquaris-E5
linux-vegetahd:needed
Package
Source: linux-lts-quantal (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):ignored (end-of-life)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Patches:
Package
Source: linux (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):needed
Ubuntu 14.04 LTS (Trusty Tahr):released (3.13.0-79.123)
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:released (3.19.0-51.57)
Ubuntu 15.10 (Wily Werewolf):released (4.2.0-30.35)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-8.23)
Ubuntu 16.10 (Yakkety Yak):not-affected (4.4.0-21.37)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed by local-2016-1575-1
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed by local-2016-1575-2
Package
Source: linux-ti-omap4 (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):needed
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-lts-raring (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):ignored (end-of-life)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-armadaxp (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):needed
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-linaro-shared (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):ignored (abandoned)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-maguro (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-lts-xenial (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):not-affected (4.4.0-13.29~14.04.1)
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-lts-saucy (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):ignored (end-of-life)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-manta (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):ignored (reached end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-grouper (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-linaro-vexpress (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):ignored (abandoned)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-qcm-msm (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):ignored (abandoned)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-lts-vivid (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):released (3.19.0-51.57~14.04.1)
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-raspi2 (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:pending
Ubuntu 15.10 (Wily Werewolf):released (4.2.0-1025.32)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1003.4)
Ubuntu 16.10 (Yakkety Yak):not-affected (4.4.0-1009.10)
Package
Source: linux-snapdragon (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1012.12)
Ubuntu 16.10 (Yakkety Yak):not-affected (4.4.0-1012.12)
Package
Source: linux-mako (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):ignored (reached end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus):needed
Ubuntu 16.10 (Yakkety Yak):needs-triage
Package
Source: linux-linaro-omap (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):ignored (abandoned)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-lts-utopic (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):released (3.16.0-62.82~14.04.1)
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 16.10 (Yakkety Yak):DNE
Package
Source: linux-goldfish (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):ignored (reached end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus):needed
Ubuntu 16.10 (Yakkety Yak):needs-triage
Package
Source tree: https://github.com/bq/aquaris-E4.5
linux-krillin:needed
Package
Source: linux-flo (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 LTS (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu Touch 15.04:DNE
Ubuntu Core 15.04:DNE
Ubuntu 15.10 (Wily Werewolf):ignored (reached end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus):needed
Ubuntu 16.10 (Yakkety Yak):needs-triage
More Information

Updated: 2016-08-01 16:21:29 UTC (commit 11295)