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.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 4.9 MEDIUM

5.5^/10

CVSS v3.0 : MEDIUM

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

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.9^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.9 / Impact : 6.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185	Issue Tracking Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185	Issue Tracking Patch
http://www.openwall.com/lists/oss-security/2016/07/11/8	Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1355650	Issue Tracking
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html	Vendor Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html	Third Party Advisory
http://www.ubuntu.com/usn/USN-3070-2
http://www.securityfocus.com/bid/91709
http://www.ubuntu.com/usn/USN-3070-1
http://www.ubuntu.com/usn/USN-3070-3
http://www.ubuntu.com/usn/USN-3070-4
http://www.securitytracker.com/id/1036273
http://rhn.redhat.com/errata/RHSA-2016-1875.html
http://rhn.redhat.com/errata/RHSA-2016-1847.html

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Configurations

Configuration 1 (hide)

cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:oracle:vm_server:3.4:*:*:*:*:*:*:*

Information

Published : 2016-08-06 13:59

Updated : 2019-12-27 08:08

NVD link : CVE-2016-6197

Mitre link : CVE-2016-6197

JSON object : View

CWE

CWE-20

Improper Input Validation

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Products Affected

linux

linux_kernel

oracle

linux
vm_server

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