Detections
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Azure Linux 3.0 Security Update: qemu (CVE-2021-3929)

high Nessus Plugin ID 215490

Synopsis

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

Description

The version of qemu 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-2021-3929 advisory.

 - A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and, just like it, when the reentrancy write triggers the reset function nvme_ctrl_reset(), data structs will be freed leading 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, executing arbitrary code within the context of the QEMU process on the host. (CVE-2021-3929)

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-2021-3929

Plugin Details

Severity: High

ID: 215490

File Name: azure_linux_CVE-2021-3929.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: 6.5

Temporal Score: 5.1

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

CVSS Score Source: CVE-2021-3929

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: 8/14/2022

Reference Information

CVE: CVE-2021-3929

IAVB: 2022-B-0057-S