PT-2016-6796 · Linux+4 · Linux Kernel+4

Cai Qian + 1 · Published 2016-06-22 · Updated 2019-12-27 · CVE-2016-6197

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 4.6

Description The issue is related to the OverlayFS filesystem implementation in the Linux kernel. It does not properly verify the upper dentry before proceeding with unlink and rename system-call processing. This allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.

Recommendations For Linux kernel versions prior to 4.6, update to version 4.6 or later to resolve the issue.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2016-1634

ALT-PU-2017-1330

CESA-2016_1847

CVE-2016-6197

RHSA-2016:1847

RHSA-2016:1875

RHSA-2016_1847

RHSA-2016_1875

USN-3070-1

USN-3070-2

USN-3070-3

USN-3070-4

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

Ubuntu

References · 39

• https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2016-6197 · Security Note
• https://linux.oracle.com/errata/ELSA-2016-3587.html · Vendor Advisory
• http://ubuntu.com/usn/USN-3070-3 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-6197 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-5828 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-5696 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2016-6197 · Vendor Advisory
• http://oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3070-4 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-5728 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3070-2 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3070-3 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-6197 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3070-3 · Vendor Advisory