CVE-2018-12617

Publication date 21 June 2018

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	21.04 hirsute	Fixed 1:2.12+dfsg-3ubuntu9
	20.10 groovy	Fixed 1:2.12+dfsg-3ubuntu9
	20.04 LTS focal	Fixed 1:2.12+dfsg-3ubuntu9
	19.10 eoan	Fixed 1:2.12+dfsg-3ubuntu9
	19.04 disco	Fixed 1:2.12+dfsg-3ubuntu9
	18.10 cosmic	Fixed 1:2.12+dfsg-3ubuntu8.1
	18.04 LTS bionic	Fixed 1:2.11+dfsg-1ubuntu7.8
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.33
	14.04 LTS trusty	Fixed 2.0.0+dfsg-2ubuntu1.44
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=141b197408ab398c4f474ac1a728ab316e921f2b

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3826-1
QEMU vulnerabilities
26 November 2018