CVE-2018-5391
Published: 14 August 2018
The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size.
From the Ubuntu Security Team
Juha-Matti Tilli discovered that the IP implementation in the Linux kernel performed algorithmically expensive operations in some situations when handling incoming packet fragments. A remote attacker could use this to cause a denial of service.
Notes
| Author | Note |
|---|---|
| tyhicks | CERT recommends reverting c2a936600f78aea00d3312ea4b66a79a4619f9b4 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux-aws Launchpad, Ubuntu, Debian |
upstream |
Released
(4.19~rc4)
|
| trusty |
Released
(4.4.0-1027.30)
|
|
| xenial |
Released
(4.4.0-1065.75)
|
|
| bionic |
Released
(4.15.0-1019.19)
|
|
| cosmic |
Not vulnerable
(4.15.0-1020.20)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
upstream |
Released
(4.19~rc4)
|
| trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
| bionic |
Released
(4.15.0-1021.21)
|
|
| cosmic |
Not vulnerable
(4.15.0-1023.24)
|
|
| xenial |
Released
(4.15.0-1021.21~16.04.1)
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
xenial |
Released
(4.4.0-9029.31)
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
upstream |
Released
(4.19~rc4)
|
| trusty |
Does not exist
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
|
| bionic |
Released
(4.15.0-1015.18)
|
|
| cosmic |
Not vulnerable
(4.15.0-1017.20)
|
|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-32.35)
|
| cosmic |
Not vulnerable
(4.18.0-9.10)
|
|
| trusty |
Released
(3.13.0-155.205)
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-133.159)
|
|
|
Patches: Introduced by c2a936600f78aea00d3312ea4b66a79a4619f9b4 Introduced by c2a936600f78aea00d3312ea4b66a79a4619f9b4 Introduced by c2a936600f78aea00d3312ea4b66a79a4619f9b4 Introduced by c2a936600f78aea00d3312ea4b66a79a4619f9b4 Introduced by c2a936600f78aea00d3312ea4b66a79a4619f9b4 |
||
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1004.4~18.04.1)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-1021.21)
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1017.18)
|
| cosmic |
Not vulnerable
(4.15.0-1018.19)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-1017.18~16.04.1)
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(end of life)
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-32.35~16.04.1)
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-11.12~18.04.1)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-32.35~16.04.1)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1019.19)
|
| cosmic |
Not vulnerable
(4.18.0-1003.3)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-1031.37)
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Released
(4.4.0-133.159~14.04.1)
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1020.22)
|
| cosmic |
Not vulnerable
(4.18.0-1005.7)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-1094.102)
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-1098.103)
|
|
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 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5391
- https://www.kb.cert.org/vuls/id/641765
- https://ubuntu.com/security/notices/USN-3740-1
- https://ubuntu.com/security/notices/USN-3740-2
- https://ubuntu.com/security/notices/USN-3741-1
- https://ubuntu.com/security/notices/USN-3741-2
- https://ubuntu.com/security/notices/USN-3742-1
- https://ubuntu.com/security/notices/USN-3742-2
- NVD
- Launchpad
- Debian