openEuler 22.03 LTS update for qemu

Published: 2022-07-01

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-3929 CVE-2021-3750
CWE-ID	CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	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-guest-agent Operating systems & Components / Operating system package or component qemu-block-rbd Operating systems & Components / Operating system package or component qemu-block-curl Operating systems & Components / Operating system package or component qemu-system-riscv Operating systems & Components / Operating system package or component qemu-block-iscsi Operating systems & Components / Operating system package or component qemu-img Operating systems & Components / Operating system package or component qemu-hw-usb-host Operating systems & Components / Operating system package or component qemu-system-arm 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-system-aarch64 Operating systems & Components / Operating system package or component qemu-block-ssh Operating systems & Components / Operating system package or component qemu-system-x86_64 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 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU64570

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 22.03 LTS

qemu-seabios: before 6.2.0-41

qemu-help: before 6.2.0-41

qemu-guest-agent: before 6.2.0-41

qemu-block-rbd: before 6.2.0-41

qemu-block-curl: before 6.2.0-41

qemu-system-riscv: before 6.2.0-41

qemu-block-iscsi: before 6.2.0-41

qemu-img: before 6.2.0-41

qemu-hw-usb-host: before 6.2.0-41

qemu-system-arm: before 6.2.0-41

qemu-debugsource: before 6.2.0-41

qemu-debuginfo: before 6.2.0-41

qemu-system-aarch64: before 6.2.0-41

qemu-block-ssh: before 6.2.0-41

qemu-system-x86_64: before 6.2.0-41

qemu: before 6.2.0-41

CPE2.3

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1733

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) Use-after-free

EUVDB-ID: #VU69353

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-3750