PT-2016-6802 · Linux+4 · Linux Kernel+4

Cai Qian · Published 2016-07-14 · Updated 2018-01-05 · CVE-2016-6213

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/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 4.9

Description The issue allows local users to cause a denial of service, resulting in memory consumption and deadlock, by exploiting the lack of restriction on the number of mounts in a mount namespace. This can be achieved through MS BIND mount system calls, as demonstrated by a loop that triggers exponential growth in the number of mounts.

Recommendations For Linux kernel versions prior to 4.9, update to version 4.9 or later to resolve the issue.

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

ALT-PU-2017-1011

ALT-PU-2017-1330

CESA-2017_1842

CVE-2016-6213

MGASA-2017-0136

MGASA-2017-0147

MGASA-2017-0148

RHSA-2017:1842

RHSA-2017:2077

RHSA-2017_1842

RHSA-2017_2077

USN-3160-1

USN-3160-2

USN-3161-1

USN-3161-2

USN-3161-3

USN-3161-4

USN-3162-1

USN-3162-2

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

Ubuntu

References · 62

• https://github.com/torvalds/linux/commit/d29216842a85c7970c536108e093963f02714498 · Patch
• https://linux.oracle.com/errata/ELSA-2017-1842-1.html · Vendor Advisory
• https://osv.dev/vulnerability/USN-3161-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3160-2 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2017-0147 · Vendor Advisory
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d29216842a85c7970c536108e093963f02714498 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-7916 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2016-6213 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-6213 · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-8964 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-6213 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-6213 · Security Note
• https://osv.dev/vulnerability/USN-3161-4 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2017-0148.html · Security Note
• https://linux.oracle.com/errata/ELSA-2017-3605.html · Vendor Advisory