CVE-2016-1576

Public Exploit

Description

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.

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.35%

Vendor Advisory kernel.org

Affected: n/a n/a

References

Link	Tags
https://launchpadlibrarian.net/235300093/0005-overlayfs-Be-more-careful-about-copying-up-sxid-file.patch	patch mailing list third party advisory
https://launchpadlibrarian.net/235300225/0006-overlayfs-Propogate-nosuid-from-lower-and-upper-moun.patch	patch mailing list third party advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360	patch vendor advisory mailing list
https://bugs.launchpad.net/bugs/1535150	third party advisory
http://www.openwall.com/lists/oss-security/2016/02/24/8	third party advisory mailing list
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1576.html	third party advisory
http://www.halfdog.net/Security/2016/OverlayfsOverFusePrivilegeEscalation/	third party advisory exploit
http://www.openwall.com/lists/oss-security/2021/10/18/1	third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2016-1576?: CVE-2016-1576 has been scored as a high severity vulnerability.
How to fix CVE-2016-1576?: To fix CVE-2016-1576, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-1576 being actively exploited in the wild?: It is possible that CVE-2016-1576 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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