CVE-2020-10942

Published: 24 March 2020

In the Linux kernel before 5.5.8, get_raw_socket in drivers/vhost/net.c lacks validation of an sk_family field, which might allow attackers to trigger kernel stack corruption via crafted system calls.

From the Ubuntu Security Team

It was discovered that the vhost net driver in the Linux kernel contained a stack buffer overflow. A local attacker with the ability to perform ioctl() calls on /dev/vhost-net could use this to cause a denial of service (system crash).

Priority

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-99.100)
	eoan	Released (5.3.0-51.44)
	focal	Not vulnerable (5.4.0-18.22)
	trusty	Ignored (was needed ESM criteria)
	upstream	Released (5.6~rc4)
	xenial	Released (4.4.0-179.209)
	Patches: Introduced by 3a4d5c94e959359ece6d6b55045c3f046677f55c Fixed by 42d84c8490f9f0931786f1623191fcab397c3d64
linux-hwe Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-51.44~18.04.2)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Released (4.15.0-99.100~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Ignored (end of life, was needs-triage)
linux-oem Launchpad, Ubuntu, Debian	focal	Does not exist
	bionic	Released (4.15.0-1080.90)
	eoan	Ignored (end of life, was pending)
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Ignored (end of standard support, was needs-triage)
linux-aws Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1066.70)
	eoan	Released (5.3.0-1017.18)
	trusty	Released (4.4.0-1067.71) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.6~rc4)
	xenial	Released (4.4.0-1107.118)
	focal	Not vulnerable (5.4.0-1005.5)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1059.60)
	eoan	Released (5.3.0-1016.17)
	focal	Not vulnerable (5.4.0-1004.4)
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Released (4.4.0-1071.78)
linux-oem-osp1 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1050.55)
	eoan	Ignored (end of life, was pending)
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-aws-5.0 Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Released (4.15.0-1066.70~16.04.1)
linux-aws-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1017.18~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-azure-4.15 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1082.92)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-gcp-4.15 Launchpad, Ubuntu, Debian	eoan	Does not exist
	bionic	Not vulnerable (4.15.0-1071.81)
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-azure Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needed)
	eoan	Released (5.3.0-1020.21)
	focal	Not vulnerable (5.4.0-1006.6)
	trusty	Ignored (was needed ESM criteria)
	upstream	Released (5.6~rc4)
	xenial	Released (4.15.0-1082.92~16.04.1)
linux-azure-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1020.21~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-gcp Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needed)
	eoan	Released (5.3.0-1018.19)
	focal	Not vulnerable (5.4.0-1005.5)
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Released (4.15.0-1061.65)
linux-gcp-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1018.19~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-gke-4.15 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1058.61)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-gke-5.0 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1035.36)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-gke-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1018.19~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Released (4.4.0-179.209~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-oem-5.6 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.6.0-1007.7)
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-oracle Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1038.42)
	eoan	Released (5.3.0-1016.18)
	focal	Not vulnerable (5.4.0-1005.5)
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Released (4.15.0-1038.42~16.04.1)
linux-oracle-5.0 Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needed)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-oracle-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1016.18~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-raspi Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.4.0-1007.7)
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1061.65)
	eoan	Released (5.3.0-1023.25)
	focal	Ignored (end of life, was needs-triage)
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Released (4.4.0-1133.142)
linux-raspi2-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1023.25~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-riscv Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.4.0-24.28)
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Does not exist
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1077.84)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.6~rc4)
	xenial	Released (4.4.0-1137.145)

Severity score breakdown

Parameter	Value
Base score	5.3
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H

References

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