// For flags

CVE-2021-20269

kexec-tools: incorrect permissions on kdump dmesg file

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Se ha encontrado un fallo en los permisos de un archivo de registro creado por kexec-tools. Este fallo permite a un usuario local no privilegiado leer este archivo y filtrar información interna del kernel de un pánico anterior. La mayor amenaza de esta vulnerabilidad es la confidencialidad. Este fallo afecta a kexec-tools distribuido por Fedora versiones anteriores a 2.0.21-8 y versiones de RHEL anteriores a 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.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-12-17 CVE Reserved
  • 2021-11-10 CVE Published
  • 2023-09-30 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-276: Incorrect Default Permissions
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Kexec-tools Project
Search vendor "Kexec-tools Project"
 Kexec-tools
Search vendor "Kexec-tools Project" for product "Kexec-tools"
 < 2.0.21-8
Search vendor "Kexec-tools Project" for product "Kexec-tools" and version " < 2.0.21-8"
-
Affected
in Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
--
Safe
Kexec-tools Project
Search vendor "Kexec-tools Project"
 Kexec-tools
Search vendor "Kexec-tools Project" for product "Kexec-tools"
 < 2.0.20-47
Search vendor "Kexec-tools Project" for product "Kexec-tools" and version " < 2.0.20-47"
-
Affected
in Redhat
Search vendor "Redhat"
 Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
--
Safe