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).
Notes
Author | Note |
---|---|
tyhicks | Known as "SACK Panic" |
Priority
Status
Package | Release | Status |
---|---|---|
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1041.43)
|
cosmic |
Released
(4.18.0-1018.20)
|
|
disco |
Released
(5.0.0-1008.8)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.4.0-1085.96)
|
|
linux-flo Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.15.0-1041.43~16.04.1)
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-1020.20~18.04.1)
|
cosmic |
Released
(4.18.0-1020.20)
|
|
disco |
Released
(5.0.0-1008.8)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.15.0-1047.51)
|
|
linux-euclid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Ignored
(end of life, was needed)
|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-52.56)
|
cosmic |
Released
(4.18.0-22.23)
|
|
disco |
Released
(5.0.0-17.18)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.4.0-151.178)
|
|
Patches: Introduced by 832d11c5cd076abc0aa1eaf7be96c81d1a59ce41 |
||
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-1020.20~18.04.1)
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.15.0-1047.51)
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1034.36)
|
cosmic |
Released
(4.18.0-1013.14)
|
|
disco |
Released
(5.0.0-1008.8)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.15.0-1034.36~16.04.1)
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-1013.14~18.04.1)
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Ignored
(end of standard support)
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1034.36)
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
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
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Ignored
(end of life)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-22.23~18.04.1)
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.15.0-52.56~16.04.1)
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-17.18~18.04.1)
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.15.0-52.56~16.04.1)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1036.36)
|
cosmic |
Released
(4.18.0-1014.14)
|
|
disco |
Released
(5.0.0-1008.8)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.4.0-1048.55)
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-maguro Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-manta Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1043.48)
|
cosmic |
Released
(4.15.0-1043.48)
|
|
disco |
Released
(4.15.0-1043.48)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1015.17)
|
cosmic |
Released
(4.15.0-1015.17)
|
|
disco |
Released
(4.15.0-1015.17)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.15.0-1015.17~16.04.1)
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1038.40)
|
cosmic |
Released
(4.18.0-1016.18)
|
|
disco |
Released
(5.0.0-1010.10)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.4.0-1111.120)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1055.59)
|
cosmic |
Does not exist
|
|
disco |
Released
(5.0.0-1014.14)
|
|
upstream |
Released
(5.2~rc6)
|
|
xenial |
Released
(4.4.0-1115.121)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |