#VU92797 Resource exhaustion in Linux kernel - CVE-2017-5972
Published: February 14, 2017 / Updated: June 20, 2024
Vulnerability identifier: #VU92797
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2017-5972
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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.
Remediation
Install update from vendor's repository.
External links
- 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
- https://security-tracker.debian.org/tracker/CVE-2017-5972
- https://www.exploit-db.com/exploits/41350/