CVE-2016-6197

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185

http://rhn.redhat.com/errata/RHSA-2016-1847.html

http://rhn.redhat.com/errata/RHSA-2016-1875.html

http://www.openwall.com/lists/oss-security/2016/07/11/8

http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html

http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

http://www.securityfocus.com/bid/91709

http://www.securitytracker.com/id/1036273

http://www.ubuntu.com/usn/USN-3070-1

http://www.ubuntu.com/usn/USN-3070-2

http://www.ubuntu.com/usn/USN-3070-3

http://www.ubuntu.com/usn/USN-3070-4

https://bugzilla.redhat.com/show_bug.cgi?id=1355650

https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185

Details

Source: MITRE

Published: 2016-08-06

Updated: 2019-12-27

Type: CWE-20

Risk Information

CVSS v2

Base Score: 4.9

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

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

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

Configuration 2

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.5.7 (inclusive)

Configuration 3

OR

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

Tenable Plugins

View all (15 total)

IDNameProductFamilySeverity
132134EulerOS 2.0 SP3 : kernel (EulerOS-SA-2019-2599)NessusHuawei Local Security Checks
high
125100EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1494)NessusHuawei Local Security Checks
high
124810EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1486)NessusHuawei Local Security Checks
high
93679OracleVM 3.4 : Unbreakable / etc (OVMSA-2016-0100)NessusOracleVM Local Security Checks
critical
93594CentOS 7 : kernel (CESA-2016:1847)NessusCentOS Local Security Checks
high
93556RHEL 7 : kernel-rt (RHSA-2016:1875)NessusRed Hat Local Security Checks
high
93555RHEL 7 : kernel (RHSA-2016:1847)NessusRed Hat Local Security Checks
high
93501Oracle Linux 7 : kernel (ELSA-2016-1847)NessusOracle Linux Local Security Checks
high
93243Ubuntu 14.04 LTS : linux-lts-xenial vulnerabilities (USN-3070-4)NessusUbuntu Local Security Checks
high
93242Ubuntu 16.04 LTS : linux-snapdragon vulnerabilities (USN-3070-3)NessusUbuntu Local Security Checks
high
93241Ubuntu 16.04 LTS : linux-raspi2 vulnerabilities (USN-3070-2)NessusUbuntu Local Security Checks
high
93217Ubuntu 16.04 LTS : linux vulnerabilities (USN-3070-1)NessusUbuntu Local Security Checks
high
93148Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2016-3596)NessusOracle Linux Local Security Checks
critical
92658OracleVM 3.4 : kernel-uek (OVMSA-2016-0091)NessusOracleVM Local Security Checks
high
92656Oracle Linux 6 / 7 : kernel-uek (ELSA-2016-3587)NessusOracle Linux Local Security Checks
high