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CVE-2019-11815

Published: 8 May 2019

An issue was discovered in rds_tcp_kill_sock in net/rds/tcp.c in the Linux kernel before 5.0.8. There is a race condition leading to a use-after-free, related to net namespace cleanup.

From the Ubuntu Security Team

It was discovered that a race condition leading to a use-after-free existed in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel. The RDS protocol is blacklisted by default in Ubuntu. If enabled, a local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Notes

AuthorNote
seth-arnold
I haven't yet seen evidence to support allegations that this is
remotely exploitable. Blacklisting rds.ko module is probably sufficient
to prevent the vulnerable code from loading. The default configuration of
the kmod package has included RDS in /etc/modprobe.d/blacklist-rare-network.conf
since 14.04 LTS. I'm dropping priority as a result.
Priority

Medium

CVSS 3 base score: 8.1

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-55.60)
cosmic Ignored
(was pending \[4.18.0-26.27\] now end-of-life)
disco
Released (5.0.0-16.17)
precise Not vulnerable
(3.0.0-12.20)
trusty Not vulnerable
(3.11.0-12.19)
upstream
Released (5.1~rc4)
xenial
Released (4.4.0-150.176)
Patches:
Introduced by

467fa15356acfb7b2efa38839c3e76caa4e6e0ea

Fixed by cb66ddd156203daefb8d71158036b27b0e2caf63
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1047.49)
cosmic Ignored
(was pending \[4.18.0-1021.25\] now end-of-life)
disco
Released (5.0.0-1007.7)
precise Does not exist

trusty
Released (4.4.0-1045.48)
upstream
Released (5.1~rc4)
xenial
Released (4.4.0-1084.94)
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.15.0-1047.49~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-1025.27~18.04.1)
cosmic Ignored
(was pending \[4.18.0-1025.27\] now end-of-life)
disco
Released (5.0.0-1008.8)
precise Does not exist

trusty Ignored
(was needed ESM criteria)
upstream
Released (5.1~rc4)
xenial
Released (4.15.0-1051.56)
linux-azure-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-1025.27~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.15.0-1051.56)
linux-euclid
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Ignored
(was needs-triage now end-of-life)
linux-flo
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Ignored
(abandoned)
linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1037.39)
cosmic Ignored
(was pending \[4.18.0-1016.17\] now end-of-life)
disco
Released (5.0.0-1007.7)
precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.15.0-1037.39~16.04.1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1037.39)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

linux-gke
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Ignored
(end-of-life)
linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1037.39)
disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-1011.11~18.04.1)
disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Ignored
(end-of-life)
linux-grouper
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-23.24~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.15.0-55.60~16.04.2)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-16.17~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.15.0-55.60~16.04.2)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1039.39)
cosmic Ignored
(was pending \[4.18.0-1017.18\] now end-of-life)
disco
Released (5.0.0-1007.7)
precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.4.0-1047.53)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Not vulnerable
(3.13.0-24.46~precise1)
trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty
Released (4.4.0-150.176~14.04.1)
upstream
Released (5.1~rc4)
xenial Does not exist

linux-maguro
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

linux-mako
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1050.57)
cosmic Ignored
(reached end-of-life)
disco
Released (4.15.0-1050.57)
precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial Ignored
(was needs-triage now end-of-life)
linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1018.20)
cosmic Ignored
(was released \[4.15.0-1018.20\] now end-of-life)
disco
Released (4.15.0-1018.20)
precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.15.0-1018.20~16.04.1)
linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1041.44)
cosmic Ignored
(was pending \[4.18.0-1019.22\] now end-of-life)
disco
Released (5.0.0-1009.9)
precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.4.0-1110.118)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1058.64)
cosmic Does not exist

disco
Released (5.0.0-1013.13)
precise Does not exist

trusty Does not exist

upstream
Released (5.1~rc4)
xenial
Released (4.4.0-1114.119)