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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- 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 ↗
- https://launchpad.net/bugs/1534961 ↗
- 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 ↗