CVE-2019-11477

Published: 17 June 2019

Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.

From the Ubuntu security team

Jonathan Looney discovered that an integer overflow existed in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service (system crash).

Priority

High

CVSS 3 base score: 7.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-52.56)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-151.178)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.13.0-171.222)
Patches:
Introduced by 832d11c5cd076abc0aa1eaf7be96c81d1a59ce41
Fixed by 3b4929f65b0d8249f19a50245cd88ed1a2f78cff
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1041.43)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1085.96)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (4.4.0-1046.50)
linux-aws-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1041.43~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.18.0-1020.20~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1047.51)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (4.15.0-1047.51~14.04.1)
linux-azure-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.18.0-1020.20~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1047.51)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-euclid
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(was needed now end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(abandoned)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1034.36)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1034.36~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.18.0-1013.14~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1034.36)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.0.0-1011.11~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.18.0-22.23~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-52.56~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-17.18~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-52.56~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1036.36)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1048.55)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr)
Released (4.4.0-151.178~14.04.1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(abandoned)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1043.48)
Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(was needed now end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1015.17)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1015.17~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1038.40)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1111.120)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (5.2~rc6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1055.59)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1115.121)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist