openEuler update for qemu

Published: 2022-05-20

Risk	High
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2021-4206 CVE-2021-4207 CVE-2021-20196 CVE-2022-26353 CVE-2022-26354 CVE-2021-3748
CWE-ID	CWE-190 CWE-362 CWE-476 CWE-416 CWE-404
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	openEuler Operating systems & Components / Operating system qemu-seabios Operating systems & Components / Operating system package or component qemu-help Operating systems & Components / Operating system package or component qemu-img 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-debuginfo Operating systems & Components / Operating system package or component qemu-block-ssh Operating systems & Components / Operating system package or component qemu-block-rbd Operating systems & Components / Operating system package or component qemu-block-iscsi Operating systems & Components / Operating system package or component qemu-block-curl Operating systems & Components / Operating system package or component qemu Operating systems & Components / Operating system package or component
Vendor	openEuler

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) 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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

qemu-seabios: before 4.1.0-63

qemu-help: before 4.1.0-63

qemu-img: before 4.1.0-63

qemu-guest-agent: before 4.1.0-63

qemu-debugsource: before 4.1.0-63

qemu-debuginfo: before 4.1.0-63

qemu-block-ssh: before 4.1.0-63

qemu-block-rbd: before 4.1.0-63

qemu-block-iscsi: before 4.1.0-63

qemu-block-curl: before 4.1.0-63

qemu: before 4.1.0-63

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1662

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) 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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

qemu-seabios: before 4.1.0-63

qemu-help: before 4.1.0-63

qemu-img: before 4.1.0-63

qemu-guest-agent: before 4.1.0-63

qemu-debugsource: before 4.1.0-63

qemu-debuginfo: before 4.1.0-63

qemu-block-ssh: before 4.1.0-63

qemu-block-rbd: before 4.1.0-63

qemu-block-iscsi: before 4.1.0-63

qemu-block-curl: before 4.1.0-63

qemu: before 4.1.0-63

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1662

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) 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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

qemu-seabios: before 4.1.0-63

qemu-help: before 4.1.0-63

qemu-img: before 4.1.0-63

qemu-guest-agent: before 4.1.0-63

qemu-debugsource: before 4.1.0-63

qemu-debuginfo: before 4.1.0-63

qemu-block-ssh: before 4.1.0-63

qemu-block-rbd: before 4.1.0-63

qemu-block-iscsi: before 4.1.0-63

qemu-block-curl: before 4.1.0-63

qemu: before 4.1.0-63

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1662

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: #VU63783

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-26353

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the virtio-net device of QEMU. A privileged user can exploit this issue to crash QEMU or potentially execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

qemu-seabios: before 4.1.0-63

qemu-help: before 4.1.0-63

qemu-img: before 4.1.0-63

qemu-guest-agent: before 4.1.0-63

qemu-debugsource: before 4.1.0-63

qemu-debuginfo: before 4.1.0-63

qemu-block-ssh: before 4.1.0-63

qemu-block-rbd: before 4.1.0-63

qemu-block-iscsi: before 4.1.0-63

qemu-block-curl: before 4.1.0-63

qemu: before 4.1.0-63

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1662

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.

5) Improper Resource Shutdown or Release

EUVDB-ID: #VU63786

Risk: Low

CVSSv3.1: 3.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-26354

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists in the vhost-vsock device of QEMU. A local user can trigger the error and gain access to sensitive information.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

qemu-seabios: before 4.1.0-63

qemu-help: before 4.1.0-63

qemu-img: before 4.1.0-63

qemu-guest-agent: before 4.1.0-63

qemu-debugsource: before 4.1.0-63

qemu-debuginfo: before 4.1.0-63

qemu-block-ssh: before 4.1.0-63

qemu-block-rbd: before 4.1.0-63

qemu-block-iscsi: before 4.1.0-63

qemu-block-curl: before 4.1.0-63

qemu: before 4.1.0-63

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1662

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.

6) Use-after-free

EUVDB-ID: #VU58813

Risk: High

CVSSv3.1: 7.8 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3748

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote guest to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when in the virtio-net device of QEMU. A malicious guest can trigger the use-after-free error and execute arbitrary code on the host system with QEMU privileges.

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

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

qemu-seabios: before 4.1.0-63

qemu-help: before 4.1.0-63

qemu-img: before 4.1.0-63

qemu-guest-agent: before 4.1.0-63

qemu-debugsource: before 4.1.0-63

qemu-debuginfo: before 4.1.0-63

qemu-block-ssh: before 4.1.0-63

qemu-block-rbd: before 4.1.0-63

qemu-block-iscsi: before 4.1.0-63

qemu-block-curl: before 4.1.0-63

qemu: before 4.1.0-63

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1662

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.