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CVE-2021-43566

Date: January 11, 2022

All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed.

Language: C

Severity Score

Severity Score

Weakness Type (CWE)

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CWE-362

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): HIGH
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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