6.0
MEDIUM CVSS 3.1
CVE-2020-14367
"Chrony Symlink During PID File Creation"
Description

A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it's opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.

INFO

Published Date :

Aug. 24, 2020, 3:15 p.m.

Last Modified :

Nov. 21, 2024, 5:03 a.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2020-14367 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.

ID Vendor Product Action
1 Canonical ubuntu_linux
1 Fedoraproject fedora
1 Tuxfamily chrony
: Total Affected Vendor : 3 | Products : 3
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 LOW [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Follow the instructions below to mitigate the CVE-2020-14367 vulnerability.
There is no known solution at this time.
Public PoC/Exploit Available at Github

CVE-2020-14367 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

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-2020-14367.

URL Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1870298 Issue Tracking Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/
https://security.gentoo.org/glsa/202008-23 Third Party Advisory
https://usn.ubuntu.com/4475-1/ Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1870298 Issue Tracking Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/
https://security.gentoo.org/glsa/202008-23 Third Party Advisory
https://usn.ubuntu.com/4475-1/ Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-14367 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-2020-14367 weaknesses.

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).

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uemitarslan/suma_scripts

Simple python scripts for various purposes

Python

Updated: 3 years, 6 months ago
0 stars 0 fork 0 watcher
Born at : Feb. 4, 2022, 9:47 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-14367 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2020-14367 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1870298
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/
    Added Reference https://security.gentoo.org/glsa/202008-23
    Added Reference https://usn.ubuntu.com/4475-1/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/ [No types assigned]
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/
    Removed CWE Red Hat, Inc. CWE-22
  • Modified Analysis by [email protected]

    Dec. 06, 2022

    Action Type Old Value New Value
    Changed Reference Type https://usn.ubuntu.com/4475-1/ No Types Assigned https://usn.ubuntu.com/4475-1/ Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
  • CVE Modified by [email protected]

    Sep. 09, 2020

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/4475-1/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Sep. 02, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1870298 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1870298 Issue Tracking, Patch, Vendor Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/ Mailing List, Third Party Advisory
    Changed Reference Type https://security.gentoo.org/glsa/202008-23 No Types Assigned https://security.gentoo.org/glsa/202008-23 Third Party Advisory
    Added CWE NIST CWE-59
    Added CPE Configuration OR *cpe:2.3:a:tuxfamily:chrony:*:*:*:*:*:*:*:* versions up to (excluding) 3.5.1
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Aug. 30, 2020

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202008-23 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 3.6
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.31 }} 0.02%

score

0.53523

percentile