This security advisory describes one medium risk vulnerability.
CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]
Exploit availability: NoDescription
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists within the virtio-fs shared file system daemon (virtiofsd). A remote privileged user of the guest operating system can create device special file in the shared directory and use it to r/w access host devices.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.Vulnerable software versions
QEMU: 5.0.0, 5.0.1, 5.1.0, 5.2.0CPE
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to open a a specially crafted file.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.