5.5
MEDIUM CVSS 3.1
CVE-2021-20269
Red Hat kexec-tools Information Disclosure
Description

A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.

INFO

Published Date :

March 10, 2022, 5:41 p.m.

Last Modified :

Nov. 21, 2024, 5:46 a.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2021-20269 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 Redhat enterprise_linux
1 Fedoraproject fedora
1 Kexec-tools_project kexec-tools
: 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-2021-20269 vulnerability.
Update the affected kexec-tools package.
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-2021-20269.

URL Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1934261 Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1934261 Issue Tracking 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-2021-20269 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-2021-20269 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).

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

The following list is the news that have been mention CVE-2021-20269 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-2021-20269 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=1934261
  • CVE Modified by [email protected]

    May. 14, 2024

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

    Feb. 12, 2023

    Action Type Old Value New Value
    Changed Description A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.
    Removed CVSS V3.1 Red Hat, Inc. AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
    Removed Reference https://access.redhat.com/errata/RHSA-2021:4404 [No Types Assigned]
    Removed Reference https://access.redhat.com/security/cve/CVE-2021-20269 [No Types Assigned]
    Added CWE Red Hat, Inc. CWE-276
  • CVE Modified by [email protected]

    Feb. 02, 2023

    Action Type Old Value New Value
    Changed Description A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47. A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality.
    Added CVSS V3.1 Red Hat, Inc. AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
    Added Reference https://access.redhat.com/security/cve/CVE-2021-20269 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2021:4404 [No Types Assigned]
    Removed CWE Red Hat, Inc. CWE-276
  • Reanalysis by [email protected]

    Oct. 07, 2022

    Action Type Old Value New Value
    Removed CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
    Changed CPE Configuration AND OR *cpe:2.3:a:kexec-tool_project:kexec-tool:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.21-8 OR cpe:2.3:o:fedoraproject:fedora:-:*:*:*:*:*:*:* AND OR *cpe:2.3:a:kexec-tools_project:kexec-tools:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.21-8 OR cpe:2.3:o:fedoraproject:fedora:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:a:kexec-tool_project:kexec-tool:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.20-47 OR cpe:2.3:o:redhat:enterprise_linux:-:*:*:*:*:*:*:* AND OR *cpe:2.3:a:kexec-tools_project:kexec-tools:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.20-47 OR cpe:2.3:o:redhat:enterprise_linux:-:*:*:*:*:*:*:*
  • Initial Analysis by [email protected]

    Mar. 15, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1934261 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1934261 Issue Tracking, Third Party Advisory
    Added CWE NIST CWE-276
    Added CPE Configuration AND OR *cpe:2.3:a:kexec-tool_project:kexec-tool:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.21-8 OR cpe:2.3:o:fedoraproject:fedora:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:a:kexec-tool_project:kexec-tool:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.20-47 OR cpe:2.3:o:redhat:enterprise_linux:-:*:*:*:*:*:*:*
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: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 2.1
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.

0.02 }} 0.00%

score

0.04582

percentile