CVE-2014-9717
published 2016-05-02CVE-2014-9717: 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…
PriorityP426medium6.1CVSS 3.0
AVLACLPRLUINSUCLIHAN
EPSS
0.33%
25.7th percentile
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.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 4.0.2-1 (bookworm) | linux 4.0.2-1 (bookworm) |
| linux | linux_kernel | <= 4.0.1 | — |
| linux | linux_kernel | >= 0 < 4.0.2-1 | 4.0.2-1 |
| linux | linux_kernel | >= 0 < 4.0.2-1 | 4.0.2-1 |
| linux | linux_kernel | >= 0 < 4.0.2-1 | 4.0.2-1 |
| linux | linux_kernel | >= 0 < 4.0.2-1 | 4.0.2-1 |
CVSS provenance
nvdv3.06.1MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
nvdv2.03.6LOWAV:L/AC:L/Au:N/C:P/I:P/A:N
osv6.1MEDIUM
vendor_debian6.1LOW
vendor_redhat6.1MEDIUM
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GHSA
GHSA-325x-3w5r-2xgh: fs/namespace
ghsa_unreviewed·2022-05-17
CVE-2014-9717 [MEDIUM] CWE-284 GHSA-325x-3w5r-2xgh: fs/namespace
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.
OSV
CVE-2014-9717: fs/namespace
osv·2016-05-02·CVSS 6.1
CVE-2014-9717 [MEDIUM] CVE-2014-9717: fs/namespace
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.
Red Hat
kernel: unsharing MNT_LOCKED mount can expose files beneath the mount.
vendor_redhat·2014-10-07·CVSS 6.1
CVE-2014-9717 [MEDIUM] CWE-552 kernel: unsharing MNT_LOCKED mount can expose files beneath the mount.
kernel: unsharing MNT_LOCKED mount can expose files beneath the mount.
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.
It was found that unsharing a mount namespace could allow a user to see data beneath their restricted namespace.
Statement: This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Package: kernel (Red Hat Enterprise Linux 5) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not
Debian
CVE-2014-9717: linux - fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 sys...
vendor_debian·2014·CVSS 6.1
CVE-2014-9717 [MEDIUM] CVE-2014-9717: linux - fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 sys...
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.
Scope: local
bookworm: resolved (fixed in 4.0.2-1)
bullseye: resolved (fixed in 4.0.2-1)
forky: resolved (fixed in 4.0.2-1)
sid: resolved (fixed in 4.0.2-1)
trixie: resolved (fixed in 4.0.2-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2014-9717 kernel: unsharing MNT_LOCKED mount can expose files beneath the mount.
bugzilla·2015-06-01·CVSS 6.1
CVE-2014-9717 [MEDIUM] CVE-2014-9717 kernel: unsharing MNT_LOCKED mount can expose files beneath the mount.
CVE-2014-9717 kernel: unsharing MNT_LOCKED mount can expose files beneath the mount.
"The semantics of MNT_LOCKED are that you aren't allowed to see what
is beneath. So if you can get under there even by unsharing the mount
namespace it is an implementation bug in MNT_LOCKED."
At this current time, Red Hat Enterprise Linux products do not ship with user namespaces enabled as a kernel compile-time option and are therefore not affected.
References:
http://marc.info/?l=linux-kernel&m=141271552117745&w=2
http://www.spinics.net/lists/linux-containers/msg30786.html
https://git.kernel.org/linus/da362b09e42ee0bcaf0356afee6078b4f324baff
http://openwall.com/lists/oss-security/2015/04/18/3
Discussion:
Statement:
This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Lin
Bugzilla
CVE-2014-9717 kernel: unsharing MNT_LOCKED mount can expose files beneath the mount. [fedora-all]
bugzilla·2015-06-01·CVSS 6.1
CVE-2014-9717 [MEDIUM] CVE-2014-9717 kernel: unsharing MNT_LOCKED mount can expose files beneath the mount. [fedora-all]
CVE-2014-9717 kernel: unsharing MNT_LOCKED mount can expose files beneath the mount. [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple su
arXiv
The Ideal Versus the Real: Revisiting the History of Virtual Machines and Containers
arxiv_fulltext·2019-04-27
The Ideal Versus the Real: Revisiting the History of Virtual Machines and Containers
The Ideal Versus the Real: Revisiting the History of Virtual Machines and Containers
Allison Randal, University of Cambridge
## Abstract
The common perception in both academic literature and the industry
today is that virtual machines offer better security, while containers
offer better performance. However, a detailed review of the history of
these technologies and the current threats they face reveals a
different story. This survey covers key developments in the evolution
of virtual machines and containers from the 1950s to today, with an
emphasis on countering modern misperceptions with accurate historical
details and providing a solid foundation for ongoing research into the
future of secure isolation for multitenant infrastructures, such as
cloud and container deployments.
## Intr
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce07d891a0891d3c0d0c2d73d577490486b809e1http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.htmlhttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2http://www.openwall.com/lists/oss-security/2015/04/17/4http://www.securityfocus.com/bid/74226http://www.spinics.net/lists/linux-containers/msg30786.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1226751https://github.com/torvalds/linux/commit/ce07d891a0891d3c0d0c2d73d577490486b809e1https://groups.google.com/forum/message/raw?msg=linux.kernel/HnegnbXk0Vs/RClojwJzAFEJhttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce07d891a0891d3c0d0c2d73d577490486b809e1http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.htmlhttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2http://www.openwall.com/lists/oss-security/2015/04/17/4http://www.securityfocus.com/bid/74226http://www.spinics.net/lists/linux-containers/msg30786.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1226751https://github.com/torvalds/linux/commit/ce07d891a0891d3c0d0c2d73d577490486b809e1https://groups.google.com/forum/message/raw?msg=linux.kernel/HnegnbXk0Vs/RClojwJzAFEJ
2016-05-02
Published