SUSE update for qemu

Published: 2022-04-11

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-20196 CVE-2021-3930
CWE-ID	CWE-476 CWE-193
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Server Operating systems & Components / Operating system qemu-s390-debuginfo Operating systems & Components / Operating system package or component qemu-s390 Operating systems & Components / Operating system package or component qemu-x86 Operating systems & Components / Operating system package or component qemu-vgabios Operating systems & Components / Operating system package or component qemu-sgabios Operating systems & Components / Operating system package or component qemu-seabios Operating systems & Components / Operating system package or component qemu-ipxe Operating systems & Components / Operating system package or component qemu-ppc-debuginfo Operating systems & Components / Operating system package or component qemu-ppc Operating systems & Components / Operating system package or component qemu-arm-debuginfo Operating systems & Components / Operating system package or component qemu-arm Operating systems & Components / Operating system package or component qemu-kvm Operating systems & Components / Operating system package or component qemu-block-rbd-debuginfo Operating systems & Components / Operating system package or component qemu-block-rbd Operating systems & Components / Operating system package or component qemu-ui-sdl-debuginfo Operating systems & Components / Operating system package or component qemu-ui-sdl Operating systems & Components / Operating system package or component qemu-ui-gtk-debuginfo Operating systems & Components / Operating system package or component qemu-ui-gtk Operating systems & Components / Operating system package or component qemu-ui-curses-debuginfo Operating systems & Components / Operating system package or component qemu-ui-curses Operating systems & Components / Operating system package or component qemu-tools-debuginfo Operating systems & Components / Operating system package or component qemu-tools Operating systems & Components / Operating system package or component qemu-lang Operating systems & Components / Operating system package or component qemu-guest-agent-debuginfo Operating systems & Components / Operating system package or component qemu-guest-agent Operating systems & Components / Operating system package or component qemu-debugsource Operating systems & Components / Operating system package or component qemu-block-ssh-debuginfo Operating systems & Components / Operating system package or component qemu-block-ssh Operating systems & Components / Operating system package or component qemu-block-iscsi-debuginfo Operating systems & Components / Operating system package or component qemu-block-iscsi Operating systems & Components / Operating system package or component qemu-block-curl-debuginfo Operating systems & Components / Operating system package or component qemu-block-curl Operating systems & Components / Operating system package or component qemu-audio-sdl-debuginfo Operating systems & Components / Operating system package or component qemu-audio-sdl Operating systems & Components / Operating system package or component qemu-audio-pa-debuginfo Operating systems & Components / Operating system package or component qemu-audio-pa Operating systems & Components / Operating system package or component qemu-audio-oss-debuginfo Operating systems & Components / Operating system package or component qemu-audio-oss Operating systems & Components / Operating system package or component qemu-audio-alsa-debuginfo Operating systems & Components / Operating system package or component qemu-audio-alsa Operating systems & Components / Operating system package or component qemu Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

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 Linux Enterprise Server: 12-SP5

qemu-s390-debuginfo: before 3.1.1.1-63.4

qemu-s390: before 3.1.1.1-63.4

qemu-x86: before 3.1.1.1-63.4

qemu-vgabios: before 1.12.0_0_ga698c89-63.4

qemu-sgabios: before 8-63.4

qemu-seabios: before 1.12.0_0_ga698c89-63.4

qemu-ipxe: before 1.0.0+-63.4

qemu-ppc-debuginfo: before 3.1.1.1-63.4

qemu-ppc: before 3.1.1.1-63.4

qemu-arm-debuginfo: before 3.1.1.1-63.4

qemu-arm: before 3.1.1.1-63.4

qemu-kvm: before 3.1.1.1-63.4

qemu-block-rbd-debuginfo: before 3.1.1.1-63.4

qemu-block-rbd: before 3.1.1.1-63.4

qemu-ui-sdl-debuginfo: before 3.1.1.1-63.4

qemu-ui-sdl: before 3.1.1.1-63.4

qemu-ui-gtk-debuginfo: before 3.1.1.1-63.4

qemu-ui-gtk: before 3.1.1.1-63.4

qemu-ui-curses-debuginfo: before 3.1.1.1-63.4

qemu-ui-curses: before 3.1.1.1-63.4

qemu-tools-debuginfo: before 3.1.1.1-63.4

qemu-tools: before 3.1.1.1-63.4

qemu-lang: before 3.1.1.1-63.4

qemu-guest-agent-debuginfo: before 3.1.1.1-63.4

qemu-guest-agent: before 3.1.1.1-63.4

qemu-debugsource: before 3.1.1.1-63.4

qemu-block-ssh-debuginfo: before 3.1.1.1-63.4

qemu-block-ssh: before 3.1.1.1-63.4

qemu-block-iscsi-debuginfo: before 3.1.1.1-63.4

qemu-block-iscsi: before 3.1.1.1-63.4

qemu-block-curl-debuginfo: before 3.1.1.1-63.4

qemu-block-curl: before 3.1.1.1-63.4

qemu-audio-sdl-debuginfo: before 3.1.1.1-63.4

qemu-audio-sdl: before 3.1.1.1-63.4

qemu-audio-pa-debuginfo: before 3.1.1.1-63.4

qemu-audio-pa: before 3.1.1.1-63.4

qemu-audio-oss-debuginfo: before 3.1.1.1-63.4

qemu-audio-oss: before 3.1.1.1-63.4

qemu-audio-alsa-debuginfo: before 3.1.1.1-63.4

qemu-audio-alsa: before 3.1.1.1-63.4

qemu: before 3.1.1.1-63.4

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20221151-1/

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.

2) Off-by-one

EUVDB-ID: #VU58812

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3930

CWE-ID: CWE-193 - Off-by-one Error

Exploit availability: No

Description

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

The vulnerability exists due to an off-by-one error in the SCSI device emulation in QEMU. A remote user on the guest OS can can trigger an off-by-one error while processing MODE SELECT commands in mode_sense_page() if the 'page' argument is set to MODE_PAGE_ALLS (0x3f). Successful exploitation of the vulnerability may result in QEMU crash.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP5

qemu-s390-debuginfo: before 3.1.1.1-63.4

qemu-s390: before 3.1.1.1-63.4

qemu-x86: before 3.1.1.1-63.4

qemu-vgabios: before 1.12.0_0_ga698c89-63.4

qemu-sgabios: before 8-63.4

qemu-seabios: before 1.12.0_0_ga698c89-63.4

qemu-ipxe: before 1.0.0+-63.4

qemu-ppc-debuginfo: before 3.1.1.1-63.4

qemu-ppc: before 3.1.1.1-63.4

qemu-arm-debuginfo: before 3.1.1.1-63.4

qemu-arm: before 3.1.1.1-63.4

qemu-kvm: before 3.1.1.1-63.4

qemu-block-rbd-debuginfo: before 3.1.1.1-63.4

qemu-block-rbd: before 3.1.1.1-63.4

qemu-ui-sdl-debuginfo: before 3.1.1.1-63.4

qemu-ui-sdl: before 3.1.1.1-63.4

qemu-ui-gtk-debuginfo: before 3.1.1.1-63.4

qemu-ui-gtk: before 3.1.1.1-63.4

qemu-ui-curses-debuginfo: before 3.1.1.1-63.4

qemu-ui-curses: before 3.1.1.1-63.4

qemu-tools-debuginfo: before 3.1.1.1-63.4

qemu-tools: before 3.1.1.1-63.4

qemu-lang: before 3.1.1.1-63.4

qemu-guest-agent-debuginfo: before 3.1.1.1-63.4

qemu-guest-agent: before 3.1.1.1-63.4

qemu-debugsource: before 3.1.1.1-63.4

qemu-block-ssh-debuginfo: before 3.1.1.1-63.4

qemu-block-ssh: before 3.1.1.1-63.4

qemu-block-iscsi-debuginfo: before 3.1.1.1-63.4

qemu-block-iscsi: before 3.1.1.1-63.4

qemu-block-curl-debuginfo: before 3.1.1.1-63.4

qemu-block-curl: before 3.1.1.1-63.4

qemu-audio-sdl-debuginfo: before 3.1.1.1-63.4

qemu-audio-sdl: before 3.1.1.1-63.4

qemu-audio-pa-debuginfo: before 3.1.1.1-63.4

qemu-audio-pa: before 3.1.1.1-63.4

qemu-audio-oss-debuginfo: before 3.1.1.1-63.4

qemu-audio-oss: before 3.1.1.1-63.4

qemu-audio-alsa-debuginfo: before 3.1.1.1-63.4

qemu-audio-alsa: before 3.1.1.1-63.4

qemu: before 3.1.1.1-63.4

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20221151-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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