openEuler update for qemu

1) Infinite loop

EUVDB-ID: #VU73788

Risk: Medium

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

CVE-ID: CVE-2020-14394

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows an attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. A privileged user on the guest OS can consume all available system resources and cause denial of service conditions of the QEMU process on the host.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

qemu-seabios: before 4.1.0-70

qemu-help: before 4.1.0-70

qemu-block-curl: before 4.1.0-70

qemu-block-iscsi: before 4.1.0-70

qemu-debugsource: before 4.1.0-70

qemu-img: before 4.1.0-70

qemu-guest-agent: before 4.1.0-70

qemu-block-ssh: before 4.1.0-70

qemu-block-rbd: before 4.1.0-70

qemu-debuginfo: before 4.1.0-70

qemu: before 4.1.0-70

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1918

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.