CVE-2018-7550

Publication date 1 March 2018

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	21.04 hirsute	Fixed 1:2.11+dfsg-1ubuntu9
	20.10 groovy	Fixed 1:2.11+dfsg-1ubuntu9
	20.04 LTS focal	Fixed 1:2.11+dfsg-1ubuntu9
	19.10 eoan	Fixed 1:2.11+dfsg-1ubuntu9
	19.04 disco	Fixed 1:2.11+dfsg-1ubuntu9
	18.10 cosmic	Fixed 1:2.11+dfsg-1ubuntu9
	18.04 LTS bionic	Fixed 1:2.11+dfsg-1ubuntu7.1
	17.10 artful	Fixed 1:2.10+dfsg-0ubuntu3.6
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.28
	14.04 LTS trusty	Fixed 2.0.0+dfsg-2ubuntu1.41
qemu-kvm	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	19.10 eoan	Not in release
	19.04 disco	Not in release
	18.10 cosmic	Not in release
	18.04 LTS bionic	Not in release
	17.10 artful	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
qemu	Upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=2a8fcd119eb7c6bb3837fc3669eb1b2dfb31daf8

Severity score breakdown

Parameter	Value
Base score	8.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3649-1
QEMU vulnerabilities
16 May 2018