// For flags

CVE-2020-25581

FreeBSD Security Advisory - FreeBSD-SA-21:04.jail_remove

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In FreeBSD 12.2-STABLE before r369312, 11.4-STABLE before r369313, 12.2-RELEASE before p4 and 11.4-RELEASE before p8 due to a race condition in the jail_remove(2) implementation, it may fail to kill some of the processes.

En FreeBSD versiones 12.2-STABLE anteriores a r369312, 11.4-STABLE anteriores a r369313, 12.2-RELEASE anteriores a p4 y 11.4-RELEASE anteriores a p8, debido a una condición de carrera en la implementación de jail_remove(2), puede cometer un fallo al eliminar algunos de los procesos.

Due to a race condition in the jail_remove(2) implementation, it may fail to kill some of the processes. A process running inside a jail can avoid being killed during jail termination. If a jail is subsequently started with the same root path, a lingering jailed process may be able to exploit the window during which a devfs filesystem is mounted but the jail's devfs ruleset has not been applied, to access device nodes which are ordinarily inaccessible. If the process is privileged, it may be able to escape the jail and gain full access to the system.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-09-14 CVE Reserved
  • 2021-02-24 CVE Published
  • 2024-08-04 CVE Updated
  • 2025-04-06 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Freebsd
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Freebsd
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11.4
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-
Affected
Freebsd
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Freebsd
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11.4
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p1
Affected
Freebsd
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Freebsd
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11.4
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p2
Affected
Freebsd
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Freebsd
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11.4
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p3
Affected
Freebsd
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Freebsd
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11.4
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p4
Affected
Freebsd
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Freebsd
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11.4
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p5
Affected
Freebsd
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Freebsd
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11.4
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p6
Affected
Freebsd
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Freebsd
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11.4
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p7
Affected
Freebsd
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Freebsd
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12.2
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-
Affected
Freebsd
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Freebsd
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12.2
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p1
Affected
Freebsd
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Freebsd
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12.2
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p2
Affected
Freebsd
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Freebsd
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12.2
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p3
Affected