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Vulnerability Details : CVE-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 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.
Publish Date : 2016-08-06 Last Update Date : 2018-01-04
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- CVSS Scores & Vulnerability Types

CVSS Score
4.9
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 20

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2016:1847: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20161847 unix
RHSA-2016:1875: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20161875 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2016-6197

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 4.5.7 Version Details Vulnerabilities
2 OS Oracle Linux 6.0 Version Details Vulnerabilities
3 OS Oracle Vm Server 3.4 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1
Oracle Linux 1
Oracle Vm Server 1

- References For CVE-2016-6197

http://www.ubuntu.com/usn/USN-3070-3
UBUNTU USN-3070-3
https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185 CONFIRM
http://rhn.redhat.com/errata/RHSA-2016-1875.html
REDHAT RHSA-2016:1875
https://bugzilla.redhat.com/show_bug.cgi?id=1355650 CONFIRM
http://www.securityfocus.com/bid/91709
BID 91709 Linux Kernel Multiple Denial of Service Vulnerabilities Release Date:2016-08-30
http://www.ubuntu.com/usn/USN-3070-4
UBUNTU USN-3070-4
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html CONFIRM
http://www.ubuntu.com/usn/USN-3070-1
UBUNTU USN-3070-1
http://www.securitytracker.com/id/1036273
SECTRACK 1036273
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185 CONFIRM
http://www.ubuntu.com/usn/USN-3070-2
UBUNTU USN-3070-2
http://rhn.redhat.com/errata/RHSA-2016-1847.html
REDHAT RHSA-2016:1847
http://www.openwall.com/lists/oss-security/2016/07/11/8
MLIST [oss-security] 20160711 Re: cvs request: local DoS using rename syscall on overlayfs on top of xfs to crash the kernel - Linux kernel
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html CONFIRM

- Metasploit Modules Related To CVE-2016-6197

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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