Ubuntu 14.04 LTS / 16.04 LTS / 17.10 / 18.04 LTS : qemu update (USN-3679-1) (Spectre)

Medium Nessus Plugin ID 110514

Synopsis

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

Description

Ken Johnson and Jann Horn independently discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via sidechannel attacks. An attacker in the guest could use this to expose sensitive guest information, including kernel memory. This update allows QEMU to expose new CPU features added by AMD microcode updates to guests on amd64 and i386.

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 qemu, qemu-system and / or qemu-system-x86 packages.

See Also

https://usn.ubuntu.com/3679-1/

Plugin Details

Severity: Medium

ID: 110514

File Name: ubuntu_USN-3679-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 2018/06/13

Updated: 2019/09/18

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.9

Temporal Score: 3.8

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

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

CVSS v3.0

Base Score: 5.5

Temporal Score: 5

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:qemu, p-cpe:/a:canonical:ubuntu_linux:qemu-system, p-cpe:/a:canonical:ubuntu_linux:qemu-system-x86, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:17.10, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

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: 2018/06/12

Vulnerability Publication Date: 2018/05/22

Reference Information

CVE: CVE-2018-3639

USN: 3679-1