openEuler 22.03 LTS SP2 update for qemu

1) Infinite loop

EUVDB-ID: #VU78946

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-3255

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

Exploit availability: No

Description

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

The vulnerability exists due to infinite loop within the vnc_client_cut_text_ext function in ui/vnc-clipboard.c. A remote authenticated client who is able to send a clipboard to the QEMU built-in VNC server can perform a denial of service conditions.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 22.03 LTS SP2

qemu-seabios: before 6.2.0-83

qemu-help: before 6.2.0-83

qemu-system-aarch64: before 6.2.0-83

qemu-guest-agent: before 6.2.0-83

qemu-system-x86_64: before 6.2.0-83

qemu-system-arm: before 6.2.0-83

qemu-block-iscsi: before 6.2.0-83

qemu-block-curl: before 6.2.0-83

qemu-img: before 6.2.0-83

qemu-debuginfo: before 6.2.0-83

qemu-block-ssh: before 6.2.0-83

qemu-block-rbd: before 6.2.0-83

qemu-system-riscv: before 6.2.0-83

qemu-debugsource: before 6.2.0-83

qemu-hw-usb-host: before 6.2.0-83

qemu: before 6.2.0-83

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1787

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.