Detections
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Azure Linux 3.0 Security Update: qemu / qemu-kvm (CVE-2021-3750)

high Nessus Plugin ID 215927

Synopsis

The remote Azure Linux host is missing one or more security updates.

Description

The version of qemu / qemu-kvm installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-3750 advisory.

 - A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content May be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0. (CVE-2021-3750)

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

Solution

Update the affected packages.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2021-3750

Plugin Details

Severity: High

ID: 215927

File Name: azure_linux_CVE-2021-3750.nasl

Version: 1.1

Type: local

Published: 2/10/2025

Updated: 2/10/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

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

CVSS Score Source: CVE-2021-3750

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.4

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

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

Vulnerability Information

CPE: p-cpe:/a:microsoft:azure_linux:qemu-system-aarch64-core, p-cpe:/a:microsoft:azure_linux:qemu-system-alpha-core, p-cpe:/a:microsoft:azure_linux:qemu-system-x86, p-cpe:/a:microsoft:azure_linux:qemu-device-display-virtio-gpu, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:qemu-system-loongarch64, p-cpe:/a:microsoft:azure_linux:qemu-system-microblaze, p-cpe:/a:microsoft:azure_linux:qemu-system-loongarch64-core, p-cpe:/a:microsoft:azure_linux:qemu-device-display-virtio-vga-gl, p-cpe:/a:microsoft:azure_linux:qemu-ui-opengl, p-cpe:/a:microsoft:azure_linux:qemu-system-cris, p-cpe:/a:microsoft:azure_linux:qemu-device-display-virtio-gpu-pci, p-cpe:/a:microsoft:azure_linux:qemu-audio-alsa, p-cpe:/a:microsoft:azure_linux:qemu-device-display-virtio-gpu-gl, p-cpe:/a:microsoft:azure_linux:qemu-block-iscsi, p-cpe:/a:microsoft:azure_linux:qemu-tests, p-cpe:/a:microsoft:azure_linux:qemu-ui-curses, p-cpe:/a:microsoft:azure_linux:qemu-system-arm, p-cpe:/a:microsoft:azure_linux:qemu-block-dmg, p-cpe:/a:microsoft:azure_linux:qemu-block-rbd, p-cpe:/a:microsoft:azure_linux:qemu-audio-oss, p-cpe:/a:microsoft:azure_linux:qemu-ipxe, p-cpe:/a:microsoft:azure_linux:qemu-system-cris-core, p-cpe:/a:microsoft:azure_linux:qemu-system-alpha, p-cpe:/a:microsoft:azure_linux:qemu-system-m68k-core, p-cpe:/a:microsoft:azure_linux:qemu-system-mips, p-cpe:/a:microsoft:azure_linux:qemu-system-x86-core, p-cpe:/a:microsoft:azure_linux:qemu-ui-egl-headless, p-cpe:/a:microsoft:azure_linux:qemu-virtiofsd, p-cpe:/a:microsoft:azure_linux:qemu-block-curl, p-cpe:/a:microsoft:azure_linux:qemu-system-avr, p-cpe:/a:microsoft:azure_linux:qemu-system-arm-core, p-cpe:/a:microsoft:azure_linux:qemu-img, p-cpe:/a:microsoft:azure_linux:qemu-device-display-vhost-user-gpu, p-cpe:/a:microsoft:azure_linux:qemu-guest-agent, p-cpe:/a:microsoft:azure_linux:qemu-system-m68k, p-cpe:/a:microsoft:azure_linux:qemu-kvm-core, p-cpe:/a:microsoft:azure_linux:qemu-common, p-cpe:/a:microsoft:azure_linux:qemu-kvm, p-cpe:/a:microsoft:azure_linux:qemu-system-hppa, p-cpe:/a:microsoft:azure_linux:qemu-user-binfmt, p-cpe:/a:microsoft:azure_linux:qemu-system-hppa-core, p-cpe:/a:microsoft:azure_linux:qemu-device-usb-smartcard, p-cpe:/a:microsoft:azure_linux:qemu-docs, p-cpe:/a:microsoft:azure_linux:qemu-tools, p-cpe:/a:microsoft:azure_linux:qemu-system-microblaze-core, p-cpe:/a:microsoft:azure_linux:qemu-ui-gtk, p-cpe:/a:microsoft:azure_linux:qemu-device-display-virtio-gpu-pci-gl, p-cpe:/a:microsoft:azure_linux:qemu-block-nfs, p-cpe:/a:microsoft:azure_linux:qemu-system-aarch64, p-cpe:/a:microsoft:azure_linux:qemu-pr-helper, p-cpe:/a:microsoft:azure_linux:qemu-system-avr-core, p-cpe:/a:microsoft:azure_linux:qemu-user, p-cpe:/a:microsoft:azure_linux:qemu, p-cpe:/a:microsoft:azure_linux:qemu-device-display-virtio-vga, p-cpe:/a:microsoft:azure_linux:qemu-device-usb-redirect, p-cpe:/a:microsoft:azure_linux:qemu-device-usb-host, p-cpe:/a:microsoft:azure_linux:qemu-device-display-virtio-gpu-ccw

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/10/2024

Vulnerability Publication Date: 5/2/2022

Reference Information

CVE: CVE-2021-3750