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CVE-2014-9717

6.1 · MEDIUM

fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access res…

Published May 2, 2016CWE-284EPSS 0.33%

Overview

CVE-2014-9717 is a medium-severity vulnerability. It was published on May 2, 2016 and has a CVSS 3.0 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce07d891a0891d3c0d0c2d73d577490486b809e1Reflists.opensuse.org/opensuse-security-announce/2016-06/msg00054.htmlReflists.opensuse.org/opensuse-security-announce/2016-06/msg00056.htmlReflists.opensuse.org/opensuse-security-announce/2016-08/msg00000.htmlRefwww.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2Refwww.openwall.com/lists/oss-security/2015/04/17/4Refwww.securityfocus.com/bid/74226Refwww.spinics.net/lists/linux-containers/msg30786.htmlRefbugzilla.redhat.com/show_bug.cgi?id=1226751GitHubgithub.com/torvalds/linux/commit/ce07d891a0891d3c0d0c2d73d577490486b809e1

How CyberStrike helps

Frequently asked questions

What is CVE-2014-9717?

CVE-2014-9717 is a medium-severity vulnerability. It was published on May 2, 2016 and has a CVSS 3.0 base score of 6.1 (MEDIUM).

How severe is CVE-2014-9717?

This vulnerability has a CVSS 3.0 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2014-9717?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2014-9717?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2014-9717 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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