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ubuntucveUbuntu.comUB:CVE-2023-5088
HistoryNov 03, 2023 - 12:00 a.m.

CVE-2023-5088

2023-11-0300:00:00
ubuntu.com
ubuntu.com
13
qemu
vm boot code
guest i/o
disk offset
hypervisor
lba 0
bug

CVSS3

7

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

6.5

Confidence

High

EPSS

0

Percentile

5.1%

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.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchqemu< anyUNKNOWN
ubuntu20.04noarchqemu< 1:4.2-3ubuntu6.28UNKNOWN
ubuntu22.04noarchqemu< 1:6.2+dfsg-2ubuntu6.16UNKNOWN
ubuntu23.04noarchqemu< 1:7.2+dfsg-5ubuntu2.4UNKNOWN
ubuntu23.10noarchqemu< 1:8.0.4+dfsg-1ubuntu3.23.10.2UNKNOWN
ubuntu24.04noarchqemu< 1:8.1.3+ds-1ubuntu1UNKNOWN
ubuntu14.04noarchqemu< anyUNKNOWN
ubuntu16.04noarchqemu< anyUNKNOWN

CVSS3

7

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

6.5

Confidence

High

EPSS

0

Percentile

5.1%