CVE-2019-9162

Published: 25 February 2019

In the Linux kernel before 4.20.12, net/ipv4/netfilter/nf_nat_snmp_basic_main.c in the SNMP NAT module has insufficient ASN.1 length checks (aka an array index error), making out-of-bounds read and write operations possible, leading to an OOPS or local privilege escalation. This affects snmp_version and snmp_helper.

From the Ubuntu Security Team

Jann Horn discovered that the SNMP NAT implementation in the Linux kernel performed insufficient ASN.1 length checks. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Priority

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.13.0-16.19)
	cosmic	Released (4.18.0-17.18)
	precise	Not vulnerable (3.0.0-12.20)
	trusty	Not vulnerable (3.11.0-12.19)
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.2.0-16.19)
	Patches: Introduced by cc2d58634e0f489d28b5564c05abc69930b4d920 Fixed by c4c07b4d6fa1f11880eab8e076d3d060ef3f55fc
linux-aws Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1001.1)
	cosmic	Released (4.18.0-1012.14)
	precise	Does not exist
	trusty	Not vulnerable (4.4.0-1002.2)
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.4.0-1001.10)
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.15.0-1030.31~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-1014.14~18.04.1)
	cosmic	Released (4.18.0-1014.14)
	precise	Does not exist
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.11.0-1009.9)
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-1014.14~18.04.1)
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.11.0-1009.9)
linux-euclid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.4.0-9019.20)
linux-flo Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (5.0~rc7)
	xenial	Ignored (abandoned)
linux-gcp Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1001.1)
	cosmic	Released (4.18.0-1008.9)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.10.0-1004.4)
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-1008.9~18.04.1)
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-gke Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Ignored (end-of-life)
linux-goldfish Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (5.0~rc7)
	xenial	Ignored (end-of-life)
linux-grouper Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-17.18~18.04.1)
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-8.9~18.04.1)
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.2)
	cosmic	Released (4.18.0-1009.9)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.4.0-1004.9)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Not vulnerable (3.13.0-24.46~precise1)
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [out of standard support])
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [out of standard support])
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [out of standard support])
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Not vulnerable (4.4.0-13.29~14.04.1)
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (5.0~rc7)
	xenial	Ignored (abandoned)
linux-manta Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (5.0~rc7)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.3)
	cosmic	Not vulnerable (4.15.0-1004.5)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Ignored (was needs-triage now end-of-life)
linux-oracle Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1007.9)
	cosmic	Not vulnerable
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.15.0-1007.9~16.04.1)
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.13.0-1005.5)
	cosmic	Released (4.18.0-1011.13)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.2.0-1013.19)
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Not vulnerable
	cosmic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc7)
	xenial	Not vulnerable (4.4.0-1012.12)

Severity score breakdown

Parameter	Value
Base score	7.8
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Bugs

https://bugs.chromium.org/p/project-zero/issues/detail?id=1776

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