CVE-2019-19922 Detail

Current Description

kernel/sched/fair.c in the Linux kernel before 5.3.9, when cpu.cfs_quota_us is used (e.g., with Kubernetes), allows attackers to cause a denial of service against non-cpu-bound applications by generating a workload that triggers unwanted slice expiration, aka CID-de53fd7aedb1. (In other words, although this slice expiration would typically be seen with benign workloads, it is possible that an attacker could calculate how many stray requests are required to force an entire Kubernetes cluster into a low-performance state caused by slice expiration, and ensure that a DDoS attack sent that number of stray requests. An attack does not affect the stability of the kernel; it only causes mismanagement of application execution.)


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.5 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.9 Mailing List  Patch  Vendor Advisory 
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=de53fd7aedb100f03e5d2231cfce0e4993282425 Mailing List  Patch  Vendor Advisory 
https://github.com/kubernetes/kubernetes/issues/67577 Issue Tracking  Patch  Third Party Advisory 
https://github.com/torvalds/linux/commit/de53fd7aedb100f03e5d2231cfce0e4993282425 Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html
https://relistan.com/the-kernel-may-be-slowing-down-your-app Exploit  Third Party Advisory 
https://security.netapp.com/advisory/ntap-20200204-0002/
https://usn.ubuntu.com/4226-1/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-19922
NVD Published Date:
12/22/2019
NVD Last Modified:
01/18/2020
Source:
MITRE