CVE-2016-1575
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.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | - | 4.5.2.x |
| canonical / ubuntu_touch | 15.04 | 15.04.x |
| canonical / ubuntu_linux | 16.10 | 16.10.x |
| canonical / ubuntu_linux | 12.04 | 12.04.x |
| canonical / ubuntu_core | 15.04 | 15.04.x |
| canonical / ubuntu_linux | 16.04 | 16.04.x |
| canonical / ubuntu_linux | 15.10 | 15.10.x |
| canonical / ubuntu_linux | 14.04 | 14.04.x |
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html
- http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/
- http://www.openwall.com/lists/oss-security/2016/02/24/7
- http://www.openwall.com/lists/oss-security/2021/10/18/1
- https://launchpad.net/bugs/1534961
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