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CVE-2019-19046

Published: 18 November 2019

** DISPUTED ** A memory leak in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering ida_simple_get() failure, aka CID-4aa7afb0ee20. NOTE: third parties dispute the relevance of this because an attacker cannot realistically control this failure at probe time.

From the Ubuntu Security Team

It was discovered that the IPMI message handler implementation in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service (kernel memory exhaustion).

Priority

Low

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
linux-hwe
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic
Released (5.3.0-46.38~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

upstream
Released (5.5~rc1)
xenial
Released (4.15.0-91.92~16.04.1)
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1063.67)
disco Ignored
(end of life)
eoan
Released (5.3.0-1016.17)
focal Not vulnerable
(5.4.0-1005.5)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.5~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial
Released (4.15.0-1063.67~16.04.1)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was pending)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-91.92)
disco Ignored
(end of life)
eoan
Released (5.3.0-46.38)
focal Not vulnerable
(5.4.0-18.22)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.5~rc1)
xenial Not vulnerable
(4.2.0-16.19)
Patches:
Introduced by

68e7e50f195f34d0d539282779cad073d999192b

Fixed by 4aa7afb0ee20a97fbf0c5bab3df028d5fb85fdab
linux-azure
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1036.38)
disco Ignored
(end of life)
eoan
Released (5.3.0-1019.20)
focal Not vulnerable
(5.4.0-1006.6)
trusty
Released (4.15.0-1074.79~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.5~rc1)
xenial
Released (4.15.0-1075.80)
linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1019.20~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1034.35)
disco Ignored
(end of life)
eoan
Released (5.3.0-1017.18)
focal Not vulnerable
(5.4.0-1005.5)
trusty Does not exist

upstream
Released (5.5~rc1)
xenial
Released (4.15.0-1058.62)
linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1017.18~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1055.58)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1033.34)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-gke-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 (5.5~rc1)
xenial Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needed)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Ignored
(end of life, was needs-triage)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1056.57)
disco Ignored
(end of life)
eoan
Released (5.3.0-1015.16)
focal Not vulnerable
(5.4.0-1004.4)
trusty Does not exist

upstream
Released (5.5~rc1)
xenial Not vulnerable
(4.4.0-1004.9)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.5~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1076.86)
disco Ignored
(end of life)
eoan
Released (4.15.0-1076.86)
focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Ignored
(end of standard support, was needs-triage)
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 (5.5~rc1)
xenial Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1047.52)
disco Ignored
(end of life)
eoan
Released (5.0.0-1047.52)
focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1035.39)
disco Ignored
(end of life)
eoan
Released (5.3.0-1014.15)
focal Not vulnerable
(5.4.0-1005.5)
trusty Does not exist

upstream
Released (5.5~rc1)
xenial
Released (4.15.0-1035.38~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1014.19)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1014.15~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
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 (5.5~rc1)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1057.61)
disco Ignored
(end of life)
eoan
Released (5.3.0-1022.24)
focal Ignored
(end of life, was needed)
trusty Does not exist

upstream
Released (5.5~rc1)
xenial Not vulnerable
(4.2.0-1013.19)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1022.24~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
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 (5.5~rc1)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1074.81)
disco Ignored
(end of life)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.5~rc1)
xenial Not vulnerable
(4.4.0-1012.12)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H