CVE-2018-5391

HIGH

Description

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.

References

http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-004.txt

http://www.securityfocus.com/bid/105108

http://www.securitytracker.com/id/1041476

http://www.securitytracker.com/id/1041637

https://access.redhat.com/errata/RHSA-2018:2785

https://access.redhat.com/errata/RHSA-2018:2791

https://access.redhat.com/errata/RHSA-2018:2846

https://access.redhat.com/errata/RHSA-2018:2924

https://access.redhat.com/errata/RHSA-2018:2925

https://access.redhat.com/errata/RHSA-2018:2933

https://access.redhat.com/errata/RHSA-2018:2948

https://access.redhat.com/errata/RHSA-2018:3083

https://access.redhat.com/errata/RHSA-2018:3096

https://access.redhat.com/errata/RHSA-2018:3459

https://access.redhat.com/errata/RHSA-2018:3540

https://access.redhat.com/errata/RHSA-2018:3586

https://access.redhat.com/errata/RHSA-2018:3590

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=c30f1fc041b74ecdb072dd44f858750414b8b19f

https://lists.debian.org/debian-lts-announce/2018/08/msg00014.html

https://security.netapp.com/advisory/ntap-20181003-0002/

https://usn.ubuntu.com/3740-1/

https://usn.ubuntu.com/3740-2/

https://usn.ubuntu.com/3741-1/

https://usn.ubuntu.com/3741-2/

https://usn.ubuntu.com/3742-1/

https://usn.ubuntu.com/3742-2/

https://www.debian.org/security/2018/dsa-4272

https://www.kb.cert.org/vuls/id/641765

Details

Source: MITRE

Published: 2018-09-06

Updated: 2019-03-11

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 7.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH