Debian DLA-1781-1 : qemu security update

high Nessus Plugin ID 124720

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VPR Score: 8.1

Synopsis

The remote Debian host is missing a security update.

Description

Several vulnerabilities were found in QEMU, a fast processor emulator :

CVE-2018-11806

It was found that the SLiRP networking implementation could use a wrong size when reallocating its buffers, which can be exploited by a priviledged user on a guest to cause denial of service or possibly arbitrary code execution on the host system.

CVE-2018-18849

It was found that the LSI53C895A SCSI Host Bus Adapter emulation was susceptible to an out of bounds memory access, which could be leveraged by a malicious guest user to crash the QEMU process.

CVE-2018-20815

A heap buffer overflow was found in the load_device_tree function, which could be used by a malicious user to potentially execute arbitrary code with the priviledges of the QEMU process.

CVE-2019-9824

William Bowling discovered that the SLiRP networking implementation did not handle some messages properly, which could be triggered to leak memory via crafted messages.

For Debian 8 'Jessie', these problems have been fixed in version 1:2.1+dfsg-12+deb8u11.

We recommend that you upgrade your qemu packages.

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

Solution

Upgrade the affected packages.

Plugin Details

Severity: High

ID: 124720

File Name: debian_DLA-1781.nasl

Version: 1.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 5/10/2019

Updated: 1/11/2021

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 8.1

CVSS v2.0

Base Score: 7.5

Temporal Score: 5.5

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

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

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:qemu, p-cpe:/a:debian:debian_linux:qemu-guest-agent, p-cpe:/a:debian:debian_linux:qemu-kvm, p-cpe:/a:debian:debian_linux:qemu-system, p-cpe:/a:debian:debian_linux:qemu-system-arm, p-cpe:/a:debian:debian_linux:qemu-system-common, p-cpe:/a:debian:debian_linux:qemu-system-mips, p-cpe:/a:debian:debian_linux:qemu-system-misc, p-cpe:/a:debian:debian_linux:qemu-system-ppc, p-cpe:/a:debian:debian_linux:qemu-system-sparc, p-cpe:/a:debian:debian_linux:qemu-system-x86, p-cpe:/a:debian:debian_linux:qemu-user, p-cpe:/a:debian:debian_linux:qemu-user-binfmt, p-cpe:/a:debian:debian_linux:qemu-user-static, p-cpe:/a:debian:debian_linux:qemu-utils, cpe:/o:debian:debian_linux:8.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/9/2019

Vulnerability Publication Date: 6/13/2018

Reference Information

CVE: CVE-2018-11806, CVE-2018-18849, CVE-2018-20815, CVE-2019-9824