#VU85827 Improper synchronization in QEMU - CVE-2023-5088
Published: January 26, 2024
Vulnerability identifier: #VU85827
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-5088
CWE-ID: CWE-662
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
QEMU
QEMU
Software vendor:
QEMU
QEMU
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper synchronization, which causes guest I/O operation otherwise addressed to an arbitrary disk offset to be targeted to offset 0 instead. An L2 guest with a virtual disk (vdiskL2) stored on a virtual disk of an L1 (vdiskL1) hypervisor can read and/or write data to LBA 0 of vdiskL1, potentially gaining control of L1 at its next reboot.
Remediation
Install updates from vendor's website.