SUSE update for qemu

1) NULL pointer dereference

EUVDB-ID: #VU63775

Risk: Low

CVSSv3.1: 2 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20196

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the floppy disk emulator of QEMU. A privileged guest can trigger a NULL pointer dereference error and cause a denial of service. 

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

SUSE MicroOS: 5.1

SUSE Linux Enterprise Module for Basesystem: 15-SP3

SUSE Linux Enterprise Module for Server Applications: 15-SP3

qemu-hw-s390x-virtio-gpu-ccw-debuginfo: before 5.2.0-150300.109.2

qemu-hw-s390x-virtio-gpu-ccw: before 5.2.0-150300.109.2

qemu-skiboot: before 5.2.0-150300.109.2

qemu-audio-pa-debuginfo: before 5.2.0-150300.109.2

qemu-audio-pa: before 5.2.0-150300.109.2

qemu-audio-alsa-debuginfo: before 5.2.0-150300.109.2

qemu-audio-alsa: before 5.2.0-150300.109.2

qemu-ppc-debuginfo: before 5.2.0-150300.109.2

qemu-ppc: before 5.2.0-150300.109.2

qemu-kvm: before 5.2.0-150300.109.2

qemu-hw-display-virtio-gpu-pci-debuginfo: before 5.2.0-150300.109.2

qemu-hw-display-virtio-gpu-pci: before 5.2.0-150300.109.2

qemu-hw-display-virtio-gpu-debuginfo: before 5.2.0-150300.109.2

qemu-hw-display-virtio-gpu: before 5.2.0-150300.109.2

qemu-ui-spice-core-debuginfo: before 5.2.0-150300.109.2

qemu-ui-spice-core: before 5.2.0-150300.109.2

qemu-ui-spice-app-debuginfo: before 5.2.0-150300.109.2

qemu-ui-spice-app: before 5.2.0-150300.109.2

qemu-ui-opengl-debuginfo: before 5.2.0-150300.109.2

qemu-ui-opengl: before 5.2.0-150300.109.2

qemu-ui-gtk-debuginfo: before 5.2.0-150300.109.2

qemu-ui-gtk: before 5.2.0-150300.109.2

qemu-hw-usb-redirect-debuginfo: before 5.2.0-150300.109.2

qemu-hw-usb-redirect: before 5.2.0-150300.109.2

qemu-hw-display-virtio-vga-debuginfo: before 5.2.0-150300.109.2

qemu-hw-display-virtio-vga: before 5.2.0-150300.109.2

qemu-hw-display-qxl-debuginfo: before 5.2.0-150300.109.2

qemu-hw-display-qxl: before 5.2.0-150300.109.2

qemu-chardev-spice-debuginfo: before 5.2.0-150300.109.2

qemu-chardev-spice: before 5.2.0-150300.109.2

qemu-audio-spice-debuginfo: before 5.2.0-150300.109.2

qemu-audio-spice: before 5.2.0-150300.109.2

qemu-ui-curses-debuginfo: before 5.2.0-150300.109.2

qemu-ui-curses: before 5.2.0-150300.109.2

qemu-lang: before 5.2.0-150300.109.2

qemu-ksm: before 5.2.0-150300.109.2

qemu-guest-agent-debuginfo: before 5.2.0-150300.109.2

qemu-guest-agent: before 5.2.0-150300.109.2

qemu-chardev-baum-debuginfo: before 5.2.0-150300.109.2

qemu-chardev-baum: before 5.2.0-150300.109.2

qemu-block-ssh-debuginfo: before 5.2.0-150300.109.2

qemu-block-ssh: before 5.2.0-150300.109.2

qemu-block-rbd-debuginfo: before 5.2.0-150300.109.2

qemu-block-rbd: before 5.2.0-150300.109.2

qemu-block-iscsi-debuginfo: before 5.2.0-150300.109.2

qemu-block-iscsi: before 5.2.0-150300.109.2

qemu-block-curl-debuginfo: before 5.2.0-150300.109.2

qemu-block-curl: before 5.2.0-150300.109.2

qemu-s390x-debuginfo: before 5.2.0-150300.109.2

qemu-s390x: before 5.2.0-150300.109.2

qemu-x86-debuginfo: before 5.2.0-150300.109.2

qemu-x86: before 5.2.0-150300.109.2

qemu-vgabios: before 1.14.0_0_g155821a-150300.109.2

qemu-sgabios: before 8-150300.109.2

qemu-seabios: before 1.14.0_0_g155821a-150300.109.2

qemu-ipxe: before 1.0.0+-150300.109.2

qemu-arm-debuginfo: before 5.2.0-150300.109.2

qemu-arm: before 5.2.0-150300.109.2

qemu-tools-debuginfo: before 5.2.0-150300.109.2

qemu-tools: before 5.2.0-150300.109.2

qemu-debugsource: before 5.2.0-150300.109.2

qemu-debuginfo: before 5.2.0-150300.109.2

qemu: before 5.2.0-150300.109.2

CPE2.3

• cpe:2.3:o:suse:suse_microos:5.1:*:*:*:*:*:*:
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP3:*:*:*:*:*:*:
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_server_applications:15-SP3:*:*:*:*:*:*:

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20220177-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.