Debian DSA-4279-1 : linux - security update (Foreshadow)

medium Nessus Plugin ID 111988

Synopsis

The remote Debian host is missing a security-related update.

Description

Multiple researchers have discovered a vulnerability in the way the Intel processor designs have implemented speculative execution of instructions in combination with handling of page-faults. This flaw could allow an attacker controlling an unprivileged process to read memory from arbitrary (non-user controlled) addresses, including from the kernel and all other processes running on the system or cross guest/host boundaries to read host memory.

To fully resolve these vulnerabilities it is also necessary to install updated CPU microcode (only available in Debian non-free). Common server class CPUs are covered in the update released as DSA 4273-1.

Solution

Upgrade the linux packages.

For the stable distribution (stretch), these problems have been fixed in version 4.9.110-3+deb9u3.

See Also

https://security-tracker.debian.org/tracker/source-package/linux

https://packages.debian.org/source/stretch/linux

https://www.debian.org/security/2018/dsa-4279

Plugin Details

Severity: Medium

ID: 111988

File Name: debian_DSA-4279.nasl

Version: 1.5

Type: local

Agent: unix

Published: 8/20/2018

Updated: 7/15/2019

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 4.7

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

CVSS v3

Risk Factor: Medium

Base Score: 5.6

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:linux, cpe:/o:debian:debian_linux:9.0

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

Patch Publication Date: 8/20/2018

Vulnerability Publication Date: 8/14/2018

Reference Information

CVE: CVE-2018-3620, CVE-2018-3646

DSA: 4279