CVE-2020-35517

Publication date 28 January 2021

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	22.04 LTS jammy	Fixed 1:5.2+dfsg-6ubuntu2
	21.10 impish	Fixed 1:5.2+dfsg-6ubuntu2
	21.04 hirsute	Fixed 1:5.2+dfsg-6ubuntu2
	20.10 groovy	Fixed 1:5.0-5ubuntu9.9
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
qemu-kvm	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	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=8afaaee976965b7fb90ec225a51d60f35c5f173c Upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=22d2ece71e533310da31f2857ebc4a00d91968b3 Upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=a3fdbbc7f271bff7d53d0501b29d910ece0b3789

Severity score breakdown

Parameter	Value
Base score	8.2 · High
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-5010-1
QEMU vulnerabilities
15 July 2021