SUSE update for qemu

Published: 2023-06-02

Risk	Medium
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2021-3929 CVE-2021-4206 CVE-2021-4207 CVE-2022-0216
CWE-ID	CWE-416 CWE-190 CWE-362
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Server 12 SP2 BCL Operating systems & Components / Operating system SUSE Linux Enterprise Server 12 Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing 12 Operating systems & Components / Operating system qemu-vgabios 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-sgabios Operating systems & Components / Operating system package or component qemu-block-ssh Operating systems & Components / Operating system package or component qemu-block-rbd-debuginfo 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 Operating systems & Components / Operating system package or component qemu-kvm Operating systems & Components / Operating system package or component qemu-block-curl-debuginfo Operating systems & Components / Operating system package or component qemu-tools-debuginfo Operating systems & Components / Operating system package or component qemu-block-curl Operating systems & Components / Operating system package or component qemu-guest-agent-debuginfo Operating systems & Components / Operating system package or component qemu-x86-debuginfo Operating systems & Components / Operating system package or component qemu-lang Operating systems & Components / Operating system package or component qemu-guest-agent Operating systems & Components / Operating system package or component qemu-block-rbd Operating systems & Components / Operating system package or component qemu-x86 Operating systems & Components / Operating system package or component qemu-tools Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU64570

Risk: Medium

CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3929

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the NVM Express Controller emulation in QEMU within the dma_buf_write() and dma_buf_read() function in hw/nvme/ctrl.c:nvme_tx(). A remote privileged user on the guest OS can trigger a use-after-free error and execute arbitrary code on the QEMU host.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server 12 SP2 BCL: 12-SP2

SUSE Linux Enterprise Server 12: SP2

SUSE Linux Enterprise High Performance Computing 12: SP2

qemu-vgabios: before 1.9.1_0_gb3ef39f-41.76.1

qemu-seabios: before 1.9.1_0_gb3ef39f-41.76.1

qemu-ipxe: before 1.0.0-41.76.1

qemu-sgabios: before 8-41.76.1

qemu-block-ssh: before 2.6.2-41.76.1

qemu-block-rbd-debuginfo: before 2.6.2-41.76.1

qemu-debugsource: before 2.6.2-41.76.1

qemu-block-ssh-debuginfo: before 2.6.2-41.76.1

qemu: before 2.6.2-41.76.1

qemu-kvm: before 2.6.2-41.76.1

qemu-block-curl-debuginfo: before 2.6.2-41.76.1

qemu-tools-debuginfo: before 2.6.2-41.76.1

qemu-block-curl: before 2.6.2-41.76.1

qemu-guest-agent-debuginfo: before 2.6.2-41.76.1

qemu-x86-debuginfo: before 2.6.2-41.76.1

qemu-lang: before 2.6.2-41.76.1

qemu-guest-agent: before 2.6.2-41.76.1

qemu-block-rbd: before 2.6.2-41.76.1

qemu-x86: before 2.6.2-41.76.1

qemu-tools: before 2.6.2-41.76.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20232358-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Integer overflow

EUVDB-ID: #VU63787

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4206

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the target system.

The vulnerability exists due to integer overflow in the cursor_alloc() function in the QXL display device emulation in QEMU. A privileged user can crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server 12 SP2 BCL: 12-SP2

SUSE Linux Enterprise Server 12: SP2

SUSE Linux Enterprise High Performance Computing 12: SP2

qemu-vgabios: before 1.9.1_0_gb3ef39f-41.76.1

qemu-seabios: before 1.9.1_0_gb3ef39f-41.76.1

qemu-ipxe: before 1.0.0-41.76.1

qemu-sgabios: before 8-41.76.1

qemu-block-ssh: before 2.6.2-41.76.1

qemu-block-rbd-debuginfo: before 2.6.2-41.76.1

qemu-debugsource: before 2.6.2-41.76.1

qemu-block-ssh-debuginfo: before 2.6.2-41.76.1

qemu: before 2.6.2-41.76.1

qemu-kvm: before 2.6.2-41.76.1

qemu-block-curl-debuginfo: before 2.6.2-41.76.1

qemu-tools-debuginfo: before 2.6.2-41.76.1

qemu-block-curl: before 2.6.2-41.76.1

qemu-guest-agent-debuginfo: before 2.6.2-41.76.1

qemu-x86-debuginfo: before 2.6.2-41.76.1

qemu-lang: before 2.6.2-41.76.1

qemu-guest-agent: before 2.6.2-41.76.1

qemu-block-rbd: before 2.6.2-41.76.1

qemu-x86: before 2.6.2-41.76.1

qemu-tools: before 2.6.2-41.76.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20232358-1/

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.

3) Race condition

EUVDB-ID: #VU63788

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4207

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition in the QXL display device emulation in QEMU. A privileged user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server 12 SP2 BCL: 12-SP2

SUSE Linux Enterprise Server 12: SP2

SUSE Linux Enterprise High Performance Computing 12: SP2

qemu-vgabios: before 1.9.1_0_gb3ef39f-41.76.1

qemu-seabios: before 1.9.1_0_gb3ef39f-41.76.1

qemu-ipxe: before 1.0.0-41.76.1

qemu-sgabios: before 8-41.76.1

qemu-block-ssh: before 2.6.2-41.76.1

qemu-block-rbd-debuginfo: before 2.6.2-41.76.1

qemu-debugsource: before 2.6.2-41.76.1

qemu-block-ssh-debuginfo: before 2.6.2-41.76.1

qemu: before 2.6.2-41.76.1

qemu-kvm: before 2.6.2-41.76.1

qemu-block-curl-debuginfo: before 2.6.2-41.76.1

qemu-tools-debuginfo: before 2.6.2-41.76.1

qemu-block-curl: before 2.6.2-41.76.1

qemu-guest-agent-debuginfo: before 2.6.2-41.76.1

qemu-x86-debuginfo: before 2.6.2-41.76.1

qemu-lang: before 2.6.2-41.76.1

qemu-guest-agent: before 2.6.2-41.76.1

qemu-block-rbd: before 2.6.2-41.76.1

qemu-x86: before 2.6.2-41.76.1

qemu-tools: before 2.6.2-41.76.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20232358-1/

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.

4) Use-after-free

EUVDB-ID: #VU68551

Risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-0216

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the LSI53C895A SCSI Host Bus Adapter emulation of QEMU when processing repeated messages to cancel the current SCSI request via the lsi_do_msgout() function. A remote user on the guest OS can trigger a use-after-free error and perform a denial of service attack against the QEMU host.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server 12 SP2 BCL: 12-SP2

SUSE Linux Enterprise Server 12: SP2

SUSE Linux Enterprise High Performance Computing 12: SP2

qemu-vgabios: before 1.9.1_0_gb3ef39f-41.76.1

qemu-seabios: before 1.9.1_0_gb3ef39f-41.76.1

qemu-ipxe: before 1.0.0-41.76.1

qemu-sgabios: before 8-41.76.1

qemu-block-ssh: before 2.6.2-41.76.1

qemu-block-rbd-debuginfo: before 2.6.2-41.76.1

qemu-debugsource: before 2.6.2-41.76.1

qemu-block-ssh-debuginfo: before 2.6.2-41.76.1

qemu: before 2.6.2-41.76.1

qemu-kvm: before 2.6.2-41.76.1

qemu-block-curl-debuginfo: before 2.6.2-41.76.1

qemu-tools-debuginfo: before 2.6.2-41.76.1

qemu-block-curl: before 2.6.2-41.76.1

qemu-guest-agent-debuginfo: before 2.6.2-41.76.1

qemu-x86-debuginfo: before 2.6.2-41.76.1

qemu-lang: before 2.6.2-41.76.1

qemu-guest-agent: before 2.6.2-41.76.1

qemu-block-rbd: before 2.6.2-41.76.1

qemu-x86: before 2.6.2-41.76.1

qemu-tools: before 2.6.2-41.76.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20232358-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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