Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-25584

Severity CVSS v4.0:
Pending analysis
Type:
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Publication date:
07/04/2021
Last modified:
03/06/2021

Description

In FreeBSD 13.0-STABLE before n245118, 12.2-STABLE before r369552, 11.4-STABLE before r369560, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, a superuser inside a FreeBSD jail configured with the non-default allow.mount permission could cause a race condition between the lookup of ".." and remounting a filesystem, allowing access to filesystem hierarchy outside of the jail.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:L/AC:H/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 6.20 MEDIUM
Vector: AV:L/AC:H/Au:N/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): High
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
6.20
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* 11.4 (excluding)
cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* 12.0 (including) 12.2 (excluding)
cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:beta1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:rc1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:rc2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:12.2:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:12.2:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:12.2:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.0:beta1:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools