CVE-2018-20784
Linux Kernel CFS Resource Consumption Denial of Service Vulnerability
Description
In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.
INFO
Published Date :
Feb. 22, 2019, 3:29 p.m.
Last Modified :
June 2, 2021, 3:28 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2018-20784
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-20784.
| URL | Resource |
|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0 | Patch Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2019:1959 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2019:1971 | Third Party Advisory |
| https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2 | Release Notes Vendor Advisory |
| https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0 | Patch Third Party Advisory |
| https://usn.ubuntu.com/4115-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4118-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4211-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4211-2/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-20784 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-20784 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Jun. 02, 2021
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://access.redhat.com/errata/RHSA-2019:1959 No Types Assigned https://access.redhat.com/errata/RHSA-2019:1959 Third Party Advisory Changed Reference Type https://access.redhat.com/errata/RHSA-2019:1971 No Types Assigned https://access.redhat.com/errata/RHSA-2019:1971 Third Party Advisory Changed Reference Type https://usn.ubuntu.com/4115-1/ No Types Assigned https://usn.ubuntu.com/4115-1/ Third Party Advisory Changed Reference Type https://usn.ubuntu.com/4118-1/ No Types Assigned https://usn.ubuntu.com/4118-1/ Third Party Advisory Changed Reference Type https://usn.ubuntu.com/4211-1/ No Types Assigned https://usn.ubuntu.com/4211-1/ Third Party Advisory Changed Reference Type https://usn.ubuntu.com/4211-2/ No Types Assigned https://usn.ubuntu.com/4211-2/ Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.20.2 OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.13 up to (excluding) 4.14.93 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19 up to (excluding) 4.19.15 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 4.20.2 *cpe:2.3:o:linux:linux_kernel:5.0:rc1:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_real_time:8:*:*:*:*:*:*:* -
CWE Remap by [email protected]
Aug. 24, 2020
Action Type Old Value New Value Changed CWE CWE-400 CWE-835 -
CVE Modified by [email protected]
Dec. 10, 2019
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4211-1/ [No Types Assigned] -
CVE Modified by [email protected]
Dec. 03, 2019
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4211-2/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 03, 2019
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4115-1/ [No Types Assigned] Added Reference https://usn.ubuntu.com/4118-1/ [No Types Assigned] -
CVE Modified by [email protected]
Jul. 30, 2019
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2019:1971 [No Types Assigned] -
CVE Modified by [email protected]
Jul. 30, 2019
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2019:1959 [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 22, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0 No Types Assigned https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0 Patch, Third Party Advisory Changed Reference Type https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2 No Types Assigned https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2 Release Notes, Vendor Advisory Changed Reference Type http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0 No Types Assigned http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0 Patch, Vendor Advisory Added CWE CWE-400 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.20.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-20784 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-20784
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
1.46 }} 0.15%
score
0.86831
percentile