CVE-2014-9717

medium
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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.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce07d891a0891d3c0d0c2d73d577490486b809e1

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2

http://www.openwall.com/lists/oss-security/2015/04/17/4

http://www.securityfocus.com/bid/74226

http://www.spinics.net/lists/linux-containers/msg30786.html

https://bugzilla.redhat.com/show_bug.cgi?id=1226751

https://github.com/torvalds/linux/commit/ce07d891a0891d3c0d0c2d73d577490486b809e1

https://groups.google.com/forum/message/raw?msg=linux.kernel/HnegnbXk0Vs/RClojwJzAFEJ

Details

Source: MITRE

Published: 2016-05-02

Updated: 2016-08-12

Type: CWE-284

Risk Information

CVSS v2

Base Score: 3.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:N

Impact Score: 4.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 6.1

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Impact Score: 4.2

Exploitability Score: 1.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.0.1 (inclusive)

Tenable Plugins

View all (4 total)

IDNameProductFamilySeverity
124826EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1503)NessusHuawei Local Security Checks
critical
93168SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:1696-1)NessusSuSE Local Security Checks
high
93165SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:1690-1)NessusSuSE Local Security Checks
high
92007openSUSE Security Update : the Linux Kernel (openSUSE-2016-862)NessusSuSE Local Security Checks
high