Ubuntu 16.04 LTS : linux-azure vulnerabilities (USN-3511-1) (Dirty COW)

high Nessus Plugin ID 105107
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Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

Mohamed Ghannam discovered that a use-after-free vulnerability existed in the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on- write of transparent huge pages. A local attacker could use this to cause a denial of service (application crashes) or possibly gain administrative privileges. (CVE-2017-1000405).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected linux-image-4.11-azure and / or linux-image-azure packages.

See Also

https://usn.ubuntu.com/3511-1/

Plugin Details

Severity: High

ID: 105107

File Name: ubuntu_USN-3511-1.nasl

Version: 3.10

Type: local

Agent: unix

Published: 12/8/2017

Updated: 9/4/2020

Dependencies: ssh_get_info.nasl, linux_alt_patch_detect.nasl

Risk Information

VPR

Risk Factor: High

Score: 8.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

Temporal Vector: E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.11-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure, cpe:/o:canonical:ubuntu_linux:16.04

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/7/2017

Vulnerability Publication Date: 11/24/2017

Reference Information

CVE: CVE-2017-1000405, CVE-2017-16939

USN: 3511-1