// For flags

CVE-2021-4115

polkit: file descriptor leak allows an unprivileged user to cause a crash

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor exhaustion. The highest threat from this vulnerability is to availability. NOTE: Polkit process outage duration is tied to the failing process being reaped and a new one being spawned

Se presenta un fallo en polkit que puede permitir a un usuario no privilegiado causar un bloqueo de polkit, debido al agotamiento del descriptor de archivos del proceso. La mayor amenaza de esta vulnerabilidad es la disponibilidad. NOTA: La duración de la interrupción del proceso de polkit está ligada al proceso que falla y a la creación de uno nuevo

There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor exhaustion.
The highest threat from this vulnerability is to availability. NOTE: Polkit process outage duration is tied to the failing process being reaped and a new one being spawned.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-12-14 CVE Reserved
  • 2022-02-21 CVE Published
  • 2023-10-13 EPSS Updated
  • 2024-08-03 CVE Updated
  • 2024-08-03 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-400: Uncontrolled Resource Consumption
  • CWE-403: Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Polkit Project
Search vendor "Polkit Project"
 Polkit
Search vendor "Polkit Project" for product "Polkit"
 0.117
Search vendor "Polkit Project" for product "Polkit" and version "0.117"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
 8.0
Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 34
Search vendor "Fedoraproject" for product "Fedora" and version "34"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 35
Search vendor "Fedoraproject" for product "Fedora" and version "35"
-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 20.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"
lts
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 21.10
Search vendor "Canonical" for product "Ubuntu Linux" and version "21.10"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 11.0
Search vendor "Debian" for product "Debian Linux" and version "11.0"
-
Affected
Oracle
Search vendor "Oracle"
 Zfs Storage Appliance Kit
Search vendor "Oracle" for product "Zfs Storage Appliance Kit"
 8.8
Search vendor "Oracle" for product "Zfs Storage Appliance Kit" and version "8.8"
-
Affected