HIGH SEVERITY

CVE-2017-5972

Linux Kernel vulnerability

CVSS
7.5
EPSS
23.9%
EPSS pct
98th
Exploited
No known
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.
Affected vendor
Linux
Affected product
Linux Kernel
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-400 — Uncontrolled Resource Consumption
Published
2017-02-14

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 23.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2017-5972

  • Confirm whether Linux Linux Kernel is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-5972.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-5972

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