CVE-2021-3997
Systemd Denial of Service Vulnerability
Description
A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp.
INFO
Published Date :
Aug. 23, 2022, 8:15 p.m.
Last Modified :
May 3, 2023, 12:15 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2021-3997 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-3997
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-2021-3997.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2021-3997 | Issue Tracking Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2024639 | Issue Tracking Patch Third Party Advisory |
| https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 | Patch Third Party Advisory |
| https://security.gentoo.org/glsa/202305-15 | |
| https://www.openwall.com/lists/oss-security/2022/01/10/2 | Exploit Mailing List 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).
Fluentbit container image built as small as possible with security in mind
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Dockerfile
Map Vulnerabilities into Different Layers of the Container Image
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3997 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3997 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 -
CVE Modified by [email protected]
May. 03, 2023
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202305-15 [No Types Assigned] -
Reanalysis by [email protected]
Oct. 18, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions up to (excluding) 250.2 OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions from (including) 240 up to (excluding) 250.2 -
Reanalysis by [email protected]
Sep. 07, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions up to (excluding) 251 OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions up to (excluding) 250.2 -
Initial Analysis by [email protected]
Aug. 27, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://access.redhat.com/security/cve/CVE-2021-3997 No Types Assigned https://access.redhat.com/security/cve/CVE-2021-3997 Issue Tracking, Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2024639 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2024639 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 No Types Assigned https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 Patch, Third Party Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2022/01/10/2 No Types Assigned https://www.openwall.com/lists/oss-security/2022/01/10/2 Exploit, Mailing List, Third Party Advisory Added CWE NIST CWE-674 Added CPE Configuration OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions up to (excluding) 251 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3997 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-2021-3997
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.07 }} 0.02%
score
0.32944
percentile