CVE-2023-5088

2023-11-0314:15:08

Debian Security Bug Tracker

security-tracker.debian.org

qemu

guest i/o operation

disk offset

vm's boot code

l2 guests

l1 hypervisor

virtual disk

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

6.3

Confidence

High

EPSS

Percentile

5.1%

JSON

A bug in QEMU could cause a guest I/O operation otherwise addressed to an arbitrary disk offset to be targeted to offset 0 instead (potentially overwriting the VM’s boot code). This could be used, for example, by L2 guests with a virtual disk (vdiskL2) stored on a virtual disk of an L1 (vdiskL1) hypervisor to read and/or write data to LBA 0 of vdiskL1, potentially gaining control of L1 at its next reboot.

OSVersionArchitecturePackageVersionFilename
Debian12allqemu< 1:7.2+dfsg-7+deb12u3qemu_1:7.2+dfsg-7+deb12u3_all.deb
Debian11allqemu<= 1:5.2+dfsg-11+deb11u3qemu_1:5.2+dfsg-11+deb11u3_all.deb
Debian999allqemu< 1:8.1.1+ds-2qemu_1:8.1.1+ds-2_all.deb
Debian13allqemu< 1:8.1.1+ds-2qemu_1:8.1.1+ds-2_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	qemu	< 1:7.2+dfsg-7+deb12u3	qemu_1:7.2+dfsg-7+deb12u3_all.deb
Debian	11	all	qemu	<= 1:5.2+dfsg-11+deb11u3	qemu_1:5.2+dfsg-11+deb11u3_all.deb
Debian	999	all	qemu	< 1:8.1.1+ds-2	qemu_1:8.1.1+ds-2_all.deb
Debian	13	all	qemu	< 1:8.1.1+ds-2	qemu_1:8.1.1+ds-2_all.deb