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Amazon Linux 2 : qemu (ALAS-2020-1407)

medium Nessus Plugin ID 134898

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of qemu installed on the remote host is prior to 3.1.0-8. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1407 advisory.

 tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code. (CVE-2020-7039)

 An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host. (CVE-2020-1711)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update qemu' to update your system.

See Also

https://access.redhat.com/security/cve/CVE-2020-1711

https://access.redhat.com/security/cve/CVE-2020-7039

https://alas.aws.amazon.com/AL2/ALAS-2020-1407.html

Plugin Details

Severity: Medium

ID: 134898

File Name: al2_ALAS-2020-1407.nasl

Version: 1.5

Type: local

Agent: unix

Published: 3/26/2020

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2020-7039

CVSS v3

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.2

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

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

CVSS Score Source: CVE-2020-1711

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:qemu-ui-sdl, p-cpe:/a:amazon:linux:qemu-guest-agent, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:qemu-debuginfo, p-cpe:/a:amazon:linux:qemu-user, p-cpe:/a:amazon:linux:qemu-ui-gtk, p-cpe:/a:amazon:linux:qemu-user-binfmt, p-cpe:/a:amazon:linux:qemu-system-aarch64, p-cpe:/a:amazon:linux:qemu-block-dmg, p-cpe:/a:amazon:linux:qemu-block-iscsi, p-cpe:/a:amazon:linux:qemu-audio-sdl, p-cpe:/a:amazon:linux:qemu-block-rbd, p-cpe:/a:amazon:linux:qemu-system-x86, p-cpe:/a:amazon:linux:qemu-block-curl, p-cpe:/a:amazon:linux:qemu-common, p-cpe:/a:amazon:linux:qemu-ui-curses, p-cpe:/a:amazon:linux:qemu-kvm-core, p-cpe:/a:amazon:linux:qemu-audio-alsa, p-cpe:/a:amazon:linux:qemu-system-x86-core, p-cpe:/a:amazon:linux:qemu, p-cpe:/a:amazon:linux:qemu-kvm, p-cpe:/a:amazon:linux:qemu-audio-pa, p-cpe:/a:amazon:linux:qemu-user-static, p-cpe:/a:amazon:linux:qemu-img, p-cpe:/a:amazon:linux:ivshmem-tools, p-cpe:/a:amazon:linux:qemu-block-ssh, p-cpe:/a:amazon:linux:qemu-audio-oss, p-cpe:/a:amazon:linux:qemu-block-nfs, p-cpe:/a:amazon:linux:qemu-system-aarch64-core

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 3/25/2020

Vulnerability Publication Date: 1/16/2020

Reference Information

CVE: CVE-2020-1711, CVE-2020-7039

ALAS: 2020-1407