CVE-2016-1576
HIGH severity · CVSS 7.8
7.8CVSS HIGH
Summary
The overlayfs implementation in the Linux kernel through 4.5.2 does not properly restrict the mount namespace, which allows local users to gain privileges by mounting an overlayfs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360 ↗
Additional information
- NVD record
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360Patch
- https://launchpadlibrarian.net/235300093/0005-overlayfs-Be-more-careful-about-copying-up-sxid-file.patchPatch
- https://launchpadlibrarian.net/235300225/0006-overlayfs-Propogate-nosuid-from-lower-and-upper-moun.patchPatch
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1576.htmlAdvisory
- http://www.openwall.com/lists/oss-security/2016/02/24/8Advisory
- http://www.openwall.com/lists/oss-security/2021/10/18/1Advisory
- https://bugs.launchpad.net/bugs/1535150Advisory
- http://www.halfdog.net/Security/2016/OverlayfsOverFusePrivilegeEscalation/Advisory