Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU80015
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-3354
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in NULL pointer dereference and denial of service.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsopenEuler: 22.03 LTS
qemu-seabios: before 6.2.0-77
qemu-help: before 6.2.0-77
qemu-block-curl: before 6.2.0-77
qemu-guest-agent: before 6.2.0-77
qemu-system-arm: before 6.2.0-77
qemu-system-riscv: before 6.2.0-77
qemu-system-x86_64: before 6.2.0-77
qemu-debuginfo: before 6.2.0-77
qemu-img: before 6.2.0-77
qemu-debugsource: before 6.2.0-77
qemu-block-iscsi: before 6.2.0-77
qemu-system-aarch64: before 6.2.0-77
qemu-hw-usb-host: before 6.2.0-77
qemu-block-rbd: before 6.2.0-77
qemu-block-ssh: before 6.2.0-77
qemu: before 6.2.0-77
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1736
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.