CVE-2016-6197
published 2016-08-06CVE-2016-6197: fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with…
PriorityP419medium5.5CVSS 3.0
AVLACLPRLUINSUCNINAH
EPSS
0.49%
39.1th percentile
fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 4.6.1-1 (bookworm) | linux 4.6.1-1 (bookworm) |
| linux | linux_kernel | <= 4.5.7 | — |
| linux | linux_kernel | >= 0 < 4.6.1-1 | 4.6.1-1 |
| linux | linux_kernel | >= 0 < 4.6.1-1 | 4.6.1-1 |
| linux | linux_kernel | >= 0 < 4.6.1-1 | 4.6.1-1 |
| linux | linux_kernel | >= 0 < 4.6.1-1 | 4.6.1-1 |
| linux | linux_kernel | >= 0 < 4.4.0-36.55 | 4.4.0-36.55 |
| 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
vendor_ubuntu5.5MEDIUM
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Ubuntu
Linux kernel (Raspberry Pi 2) vulnerabilities
vendor_ubuntu·2016-08-30·CVSS 5.5
CVE-2016-1237 [MEDIUM] Linux kernel (Raspberry Pi 2) vulnerabilities
Title: Linux kernel (Raspberry Pi 2) vulnerabilities
Summary: Several security issues were fixed in the kernel.
A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)
Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)
James Patrick-Evans discovered that the airspy USB device driver in the
Linux kernel did not properly handle certain error conditions. An attacker
with physical access could use this to cause a denial of service (memory
consumption). (CVE-2016-5400)
Yue Cao et al discovered a flaw in
Ubuntu
Linux kernel (Qualcomm Snapdragon) vulnerabilities
vendor_ubuntu·2016-08-30·CVSS 5.5
CVE-2016-1237 [MEDIUM] Linux kernel (Qualcomm Snapdragon) vulnerabilities
Title: Linux kernel (Qualcomm Snapdragon) vulnerabilities
Summary: Several security issues were fixed in the kernel.
A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)
Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)
James Patrick-Evans discovered that the airspy USB device driver in the
Linux kernel did not properly handle certain error conditions. An attacker
with physical access could use this to cause a denial of service (memory
consumption). (CVE-2016-5400)
Yue Cao et al discovered a fla
Ubuntu
Linux kernel (Xenial HWE) vulnerabilities
vendor_ubuntu·2016-08-30·CVSS 5.5
CVE-2016-1237 [MEDIUM] Linux kernel (Xenial HWE) vulnerabilities
Title: Linux kernel (Xenial HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
USN-3070-1 fixed vulnerabilities in the Linux kernel for Ubuntu
16.04 LTS. This update provides the corresponding updates for the
Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for
Ubuntu 14.04 LTS.
A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)
Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)
James Patrick-Evans discovered that the airspy USB device driver in the
Linu
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2016-08-29·CVSS 5.5
CVE-2016-1237 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)
Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)
James Patrick-Evans discovered that the airspy USB device driver in the
Linux kernel did not properly handle certain error conditions. An attacker
with physical access could use this to cause a denial of service (memory
consumption). (CVE-2016-5400)
Yue Cao et al discovered a flaw in the TCP implement
Red Hat
kernel: overlayfs: missing upper dentry verification before unlink and rename
vendor_redhat·2016-07-11·CVSS 5.5
CVE-2016-6197 [MEDIUM] CWE-362 kernel: overlayfs: missing upper dentry verification before unlink and rename
kernel: overlayfs: missing upper dentry verification before unlink and rename
fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.
It was found that the unlink and rename functionality in overlayfs did not verify the upper dentry for staleness. A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to panic or 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 packa
Debian
CVE-2016-6197: linux - fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kerne...
vendor_debian·2016·CVSS 5.5
CVE-2016-6197 [MEDIUM] CVE-2016-6197: linux - fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kerne...
fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.
Scope: local
bookworm: resolved (fixed in 4.6.1-1)
bullseye: resolved (fixed in 4.6.1-1)
forky: resolved (fixed in 4.6.1-1)
sid: resolved (fixed in 4.6.1-1)
trixie: resolved (fixed in 4.6.1-1)
GHSA
GHSA-p6f5-7r7f-h77r: fs/overlayfs/dir
ghsa_unreviewed·2022-05-13
CVE-2016-6197 [MEDIUM] CWE-20 GHSA-p6f5-7r7f-h77r: fs/overlayfs/dir
fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.
OSV
linux-lts-xenial vulnerabilities
osv·2016-08-30·CVSS 5.5
CVE-2016-1237 [MEDIUM] linux-lts-xenial vulnerabilities
linux-lts-xenial vulnerabilities
USN-3070-1 fixed vulnerabilities in the Linux kernel for Ubuntu
16.04 LTS. This update provides the corresponding updates for the
Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for
Ubuntu 14.04 LTS.
A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)
Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)
James Patrick-Evans discovered that the airspy USB device driver in the
Linux kernel did not properly handle certain error conditions. An attacker
with
OSV
linux-snapdragon vulnerabilities
osv·2016-08-30·CVSS 5.5
CVE-2016-1237 [MEDIUM] linux-snapdragon vulnerabilities
linux-snapdragon vulnerabilities
A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)
Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)
James Patrick-Evans discovered that the airspy USB device driver in the
Linux kernel did not properly handle certain error conditions. An attacker
with physical access could use this to cause a denial of service (memory
consumption). (CVE-2016-5400)
Yue Cao et al discovered a flaw in the TCP implementation's handling of
challenge acks in the Linux kernel. A remot
OSV
linux-raspi2 vulnerabilities
osv·2016-08-30·CVSS 5.5
CVE-2016-1237 [MEDIUM] linux-raspi2 vulnerabilities
linux-raspi2 vulnerabilities
A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)
Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)
James Patrick-Evans discovered that the airspy USB device driver in the
Linux kernel did not properly handle certain error conditions. An attacker
with physical access could use this to cause a denial of service (memory
consumption). (CVE-2016-5400)
Yue Cao et al discovered a flaw in the TCP implementation's handling of
challenge acks in the Linux kernel. A remote at
OSV
linux vulnerabilities
osv·2016-08-29·CVSS 5.5
CVE-2016-1237 [MEDIUM] linux vulnerabilities
linux vulnerabilities
A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)
Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)
James Patrick-Evans discovered that the airspy USB device driver in the
Linux kernel did not properly handle certain error conditions. An attacker
with physical access could use this to cause a denial of service (memory
consumption). (CVE-2016-5400)
Yue Cao et al discovered a flaw in the TCP implementation's handling of
challenge acks in the Linux kernel. A remote attacker
OSV
CVE-2016-6197: fs/overlayfs/dir
osv·2016-08-06·CVSS 5.5
CVE-2016-6197 [MEDIUM] CVE-2016-6197: fs/overlayfs/dir
fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.
No detection rules found.
No public exploits indexed.
Fortinet
Analysis of PHP's CVE-2016-6289 and CVE-2016-6297
blogs_fortinet·2016-08-10·CVSS 4.3
CVE-2016-6289 [MEDIUM] Analysis of PHP's CVE-2016-6289 and CVE-2016-6297
FORTIGUARD LABS THREAT RESEARCH
Analysis of PHP's CVE-2016-6289 and CVE-2016-6297
By Tony Loi | August 10, 2016
PHP is a programming language that was created in 1995 by Rasmus Lerdorf. And according to W3Techs, it’s dynamically generating content on more than 82% of all websites worldwide. That means hundreds of millions of web servers are vulnerable to the flaws we are describing below.
Last month, FortiGuard discovered two security issues in PHP’s core (CVE-2016-6189) and in PHP’s zip (CVE-2016-6197). These issues affect both the current PHP version 5 and its upcoming version 7. These bugs are located in different part of the code, and feature different functionalities, but they share the same type:
Integer overflow
Stack-based buffer overflow
A well-trained eye can identify these
Bugzilla
CVE-2016-6197 kernel: overlayfs: missing upper dentry verification before unlink and rename [fedora-all]
bugzilla·2016-07-12·CVSS 5.5
CVE-2016-6197 [MEDIUM] CVE-2016-6197 kernel: overlayfs: missing upper dentry verification before unlink and rename [fedora-all]
CVE-2016-6197 kernel: overlayfs: missing upper dentry verification before unlink and rename [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 mult
Bugzilla
CVE-2016-6197 kernel: overlayfs: missing upper dentry verification before unlink and rename
bugzilla·2016-07-12·CVSS 5.5
CVE-2016-6197 [MEDIUM] CVE-2016-6197 kernel: overlayfs: missing upper dentry verification before unlink and rename
CVE-2016-6197 kernel: overlayfs: missing upper dentry verification before unlink and rename
It was found that the unlink and rename functionality in overlayfs did not verify the upper dentry for staleness. A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to crash the system.
Upstream patch:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185
CVE assignment:
http://seclists.org/oss-sec/2016/q3/42
Discussion:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1355651]
---
Acknowledgments:
Name: CAI Qian (Red Hat)
---
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
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
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185http://rhn.redhat.com/errata/RHSA-2016-1847.htmlhttp://rhn.redhat.com/errata/RHSA-2016-1875.htmlhttp://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/1036273http://www.ubuntu.com/usn/USN-3070-1http://www.ubuntu.com/usn/USN-3070-2http://www.ubuntu.com/usn/USN-3070-3http://www.ubuntu.com/usn/USN-3070-4https://bugzilla.redhat.com/show_bug.cgi?id=1355650https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185http://rhn.redhat.com/errata/RHSA-2016-1847.htmlhttp://rhn.redhat.com/errata/RHSA-2016-1875.htmlhttp://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/1036273http://www.ubuntu.com/usn/USN-3070-1http://www.ubuntu.com/usn/USN-3070-2http://www.ubuntu.com/usn/USN-3070-3http://www.ubuntu.com/usn/USN-3070-4https://bugzilla.redhat.com/show_bug.cgi?id=1355650https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185
2016-08-06
Published