Ubuntu 16.04 LTS / 18.04 LTS / 19.10 / 20.04 : QEMU vulnerabilities (USN-4372-1)

medium Nessus Plugin ID 136803
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

It was discovered that QEMU incorrectly handled bochs-display devices.
A local attacker in a guest could use this to cause a denial of service or possibly execute arbitrary code in the host. This issue only affected Ubuntu 19.10. (CVE-2019-15034)

It was discovered that QEMU incorrectly handled memory during certain VNC operations. A remote attacker could possibly use this issue to cause QEMU to consume resources, resulting in a denial of service.
This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10. (CVE-2019-20382)

It was discovered that QEMU incorrectly generated QEMU Pointer Authentication signatures on ARM. A local attacker could possibly use this issue to bypass PAuth. This issue only affected Ubuntu 19.10.
(CVE-2020-10702)

Ziming Zhang discovered that QEMU incorrectly handled ATI VGA emulation. A local attacker in a guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-11869)

Aviv Sasson discovered that QEMU incorrectly handled Slirp networking.
A remote attacker could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code.
This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10. (CVE-2020-1983).

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 packages.

See Also

https://usn.ubuntu.com/4372-1/

Plugin Details

Severity: Medium

ID: 136803

File Name: ubuntu_USN-4372-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 5/22/2020

Updated: 9/17/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2019-15034

VPR

Risk Factor: Medium

Score: 4.7

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.3

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

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

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.1

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

Temporal Vector: E:U/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-aarch64, p-cpe:/a:canonical:ubuntu_linux:qemu-system-arm, p-cpe:/a:canonical:ubuntu_linux:qemu-system-mips, p-cpe:/a:canonical:ubuntu_linux:qemu-system-ppc, p-cpe:/a:canonical:ubuntu_linux:qemu-system-s390x, p-cpe:/a:canonical:ubuntu_linux:qemu-system-sparc, p-cpe:/a:canonical:ubuntu_linux:qemu-system-x86, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:19.10, cpe:/o:canonical:ubuntu_linux:20.04

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/21/2020

Vulnerability Publication Date: 3/5/2020

Reference Information

CVE: CVE-2019-15034, CVE-2019-20382, CVE-2020-10702, CVE-2020-11869, CVE-2020-1983

USN: 4372-1

IAVB: 2020-B-0026-S