CVE-2016-6198
published 2016-08-06CVE-2016-6198: The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows…
PriorityP418medium5.5CVSS 3.0
AVLACLPRLUINSUCNINAH
EPSS
0.61%
45.8th percentile
The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 4.5.5-1 (bookworm) | linux 4.5.5-1 (bookworm) |
| linux | linux_kernel | <= 4.5.4 | — |
| linux | linux_kernel | >= 0 < 4.5.5-1 | 4.5.5-1 |
| linux | linux_kernel | >= 0 < 4.5.5-1 | 4.5.5-1 |
| linux | linux_kernel | >= 0 < 4.5.5-1 | 4.5.5-1 |
| linux | linux_kernel | >= 0 < 4.5.5-1 | 4.5.5-1 |
| oracle | linux | — | — |
| oracle | vm_server | — | — |
CVSS provenance
nvdv3.05.5MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv2.04.9MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs
vendor_redhat·2016-07-11·CVSS 5.5
CVE-2016-6198 [MEDIUM] CWE-362 kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs
kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs
The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.
A flaw was found that the vfs_rename() function did not detect hard links on overlayfs. A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to crash the system.
Statement: This issue is not present in the Linux kernel packages as shipped with Red Hat Enterprise Linux versions 5 and 6.
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future Linux kernel updates fo
Debian
CVE-2016-6198: linux - The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename ...
vendor_debian·2016·CVSS 5.5
CVE-2016-6198 [MEDIUM] CVE-2016-6198: linux - The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename ...
The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.
Scope: local
bookworm: resolved (fixed in 4.5.5-1)
bullseye: resolved (fixed in 4.5.5-1)
forky: resolved (fixed in 4.5.5-1)
sid: resolved (fixed in 4.5.5-1)
trixie: resolved (fixed in 4.5.5-1)
GHSA
GHSA-pvqg-4394-gpjv: The filesystem layer in the Linux kernel before 4
ghsa_unreviewed·2022-05-13
CVE-2016-6198 [MEDIUM] CWE-284 GHSA-pvqg-4394-gpjv: The filesystem layer in the Linux kernel before 4
The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.
OSV
CVE-2016-6198: The filesystem layer in the Linux kernel before 4
osv·2016-08-06·CVSS 5.5
CVE-2016-6198 [MEDIUM] CVE-2016-6198: The filesystem layer in the Linux kernel before 4
The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-6198 kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs [fedora-all]
bugzilla·2016-07-12·CVSS 5.5
CVE-2016-6198 [MEDIUM] CVE-2016-6198 kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs [fedora-all]
CVE-2016-6198 kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs [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
Bugzilla
CVE-2016-6198 kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs
bugzilla·2016-07-12·CVSS 5.5
CVE-2016-6198 [MEDIUM] CVE-2016-6198 kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs
CVE-2016-6198 kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs
It was found that the vfs_rename() function did not detect hard links on overlayfs. A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to crash the system.
Upstream patches:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca
CVE assignment:
http://seclists.org/oss-sec/2016/q3/42
Discussion:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1355655]
---
Acknowledgments:
Name: CAI Qian (Red Hat)
---
Statement:
This issue is not present in the Linux kernel packages
arXiv
Timeloops: Automatic System Call Policy Learning for Containerized Microservices
arxiv_fulltext·2022-09-26
Timeloops: Automatic System Call Policy Learning for Containerized Microservices
Meghna Pancholi
[email protected]
Columbia University
Andreas D. Kellas
[email protected]
Columbia University
Vasileios P. Kemerlis
[email protected]
Brown University
Simha Sethumadhavan
[email protected]
Columbia University
## Abstract
We introduce , a novel technique for automatically learning system
call filtering policies for containerized microservices applications. At
run-time, automatically learns which system calls a program should
be allowed to invoke, while rejecting attempts to call spurious system calls.
Further, addresses many of the shortcomings of state-of-the-art
static analysis-based techniques, such as the ability to generate tight filters
for programs written in interpreted languages such as PHP, Python, and
JavaScript. has a simple and rob
arXiv
The Security War in File Systems: An Empirical Study from A Vulnerability-Centric Perspective
arxiv_fulltext·2022-04-26
The Security War in File Systems: An Empirical Study from A Vulnerability-Centric Perspective
The Security War in File Systems: An Empirical Study from A Vulnerability-Centric Perspective
## Abstract
This paper presents a systematic study on the security of modern file systems,
following a vulnerability-centric perspective. Specifically,
we collected 377 file system vulnerabilities committed to the CVE database in the past 20 years.
We characterize them from four dimensions that include why the vulnerabilities appear,
how the vulnerabilities can be exploited, what consequences can arise,
and how the vulnerabilities are fixed. This way, we build a deep understanding of
the attack surfaces faced by file systems, the threats imposed by the attack surfaces,
and the good and bad practices in mitigating the attacks in file systems. We envision that our study
will bring insights toward
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3cahttp://rhn.redhat.com/errata/RHSA-2016-1847.htmlhttp://rhn.redhat.com/errata/RHSA-2016-1875.htmlhttp://rhn.redhat.com/errata/RHSA-2016-2574.htmlhttp://rhn.redhat.com/errata/RHSA-2016-2584.htmlhttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5http://www.openwall.com/lists/oss-security/2016/07/11/8http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlhttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlhttp://www.securityfocus.com/bid/91709http://www.securitytracker.com/id/1036273https://bugzilla.redhat.com/show_bug.cgi?id=1355654https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3cahttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3cahttp://rhn.redhat.com/errata/RHSA-2016-1847.htmlhttp://rhn.redhat.com/errata/RHSA-2016-1875.htmlhttp://rhn.redhat.com/errata/RHSA-2016-2574.htmlhttp://rhn.redhat.com/errata/RHSA-2016-2584.htmlhttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5http://www.openwall.com/lists/oss-security/2016/07/11/8http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlhttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlhttp://www.securityfocus.com/bid/91709http://www.securitytracker.com/id/1036273https://bugzilla.redhat.com/show_bug.cgi?id=1355654https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca
2016-08-06
Published