Ubuntu 16.04 LTS : linux-hwe, linux-azure, linux-gcp, linux-oem vulnerabilities (USN-3581-2) (Spectre)

High Nessus Plugin ID 106970


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


USN-3581-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.10.
This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 17.10 for Ubuntu 16.04 LTS.

Mohamed Ghannam discovered that the IPv4 raw socket implementation in the Linux kernel contained a race condition leading to uninitialized pointer usage. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2017-17712)

ChunYu Wang discovered that a use-after-free vulnerability existed in the SCTP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code, (CVE-2017-15115)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-8824)

USN-3541-2 mitigated CVE-2017-5715 (Spectre Variant 2) for the amd64 architecture in Ubuntu 16.04 LTS. This update provides the compiler-based retpoline kernel mitigation for the amd64 and i386 architectures.

Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2017-5715).

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.


Update the affected packages.

Plugin Details

Severity: High

ID: 106970

File Name: ubuntu_USN-3581-2.nasl

Version: $Revision: 3.3 $

Type: local

Agent: unix

Published: 2018/02/23

Modified: 2018/02/26

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.2

Temporal Score: 5.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:POC/RL:OF/RC:ND


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: CVSS:3.0/E:P/RL:O/RC:X

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.13-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.13-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.13-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.13-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.13-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.13-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem, 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: 2018/02/22

Reference Information

CVE: CVE-2017-15115, CVE-2017-17712, CVE-2017-5715, CVE-2017-8824

OSVDB: 169396, 170325, 171084, 171897

USN: 3581-2

IAVA: 2018-A-0020