The TCP stack in the Linux kernel 3.x does not properly implement a SYN cookie protection mechanism for the case of a fast network connection, which allows remote attackers to cause a denial of service (CPU consumption) by sending many TCP SYN packets, as demonstrated by an attack against the kernel-3.10.0 package in CentOS Linux 7. NOTE: third parties have been unable to discern any relationship between the GitHub Engineering finding and the Trigemini.c attack code.
http://seclists.org/oss-sec/2017/q1/573
http://www.securityfocus.com/bid/96231
https://access.redhat.com/security/cve/cve-2017-5972
https://bugzilla.redhat.com/show_bug.cgi?id=1422081
https://cxsecurity.com/issue/WLB-2017020112
https://githubengineering.com/syn-flood-mitigation-with-synsanity/
https://packetstormsecurity.com/files/141083/CentOS7-Kernel-Denial-Of-Service.html
Source: MITRE
Published: 2017-02-14
Updated: 2020-07-31
Type: CWE-400
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
Base Score: 7.5
Vector: CVSS:3.1/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