// For flags

CVE-2021-45100

 

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

The ksmbd server through 3.4.2, as used in the Linux kernel through 5.15.8, sometimes communicates in cleartext even though encryption has been enabled. This occurs because it sets the SMB2_GLOBAL_CAP_ENCRYPTION flag when using the SMB 3.1.1 protocol, which is a violation of the SMB protocol specification. When Windows 10 detects this protocol violation, it disables encryption.

El servidor ksmbd versiones hasta 3.4.2, usado en el kernel de Linux hasta la versión 5.15.8, a veces se comunica en texto sin cifrar aunque se haya habilitado el cifrado. Esto ocurre porque establece la bandera SMB2_GLOBAL_CAP_ENCRYPTION cuando es usado el protocolo SMB 3.1.1, lo cual es una violación de la especificación del protocolo SMB. Cuando Windows 10 detecta esta violación del protocolo, deshabilita el cifrado

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
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
  • 2021-12-16 CVE Reserved
  • 2021-12-16 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-31 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-319: Cleartext Transmission of Sensitive Information
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Ksmbd Project
Search vendor "Ksmbd Project"
 Ksmbd
Search vendor "Ksmbd Project" for product "Ksmbd"
 <= 3.4.2
Search vendor "Ksmbd Project" for product "Ksmbd" and version " <= 3.4.2"
-
Affected
in Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 <= 5.15.8
Search vendor "Linux" for product "Linux Kernel" and version " <= 5.15.8"
-
Safe
Netapp
Search vendor "Netapp"
 H410c Firmware
Search vendor "Netapp" for product "H410c Firmware"
--
Affected
in Netapp
Search vendor "Netapp"
 H410c
Search vendor "Netapp" for product "H410c"
--
Safe
Netapp
Search vendor "Netapp"
 H300s Firmware
Search vendor "Netapp" for product "H300s Firmware"
--
Affected
in Netapp
Search vendor "Netapp"
 H300s
Search vendor "Netapp" for product "H300s"
--
Safe
Netapp
Search vendor "Netapp"
 H500s Firmware
Search vendor "Netapp" for product "H500s Firmware"
--
Affected
in Netapp
Search vendor "Netapp"
 H500s
Search vendor "Netapp" for product "H500s"
--
Safe
Netapp
Search vendor "Netapp"
 H700s Firmware
Search vendor "Netapp" for product "H700s Firmware"
--
Affected
in Netapp
Search vendor "Netapp"
 H700s
Search vendor "Netapp" for product "H700s"
--
Safe
Netapp
Search vendor "Netapp"
 H300e Firmware
Search vendor "Netapp" for product "H300e Firmware"
--
Affected
in Netapp
Search vendor "Netapp"
 H300e
Search vendor "Netapp" for product "H300e"
--
Safe
Netapp
Search vendor "Netapp"
 H500e Firmware
Search vendor "Netapp" for product "H500e Firmware"
--
Affected
in Netapp
Search vendor "Netapp"
 H500e
Search vendor "Netapp" for product "H500e"
--
Safe
Netapp
Search vendor "Netapp"
 H700e Firmware
Search vendor "Netapp" for product "H700e Firmware"
--
Affected
in Netapp
Search vendor "Netapp"
 H700e
Search vendor "Netapp" for product "H700e"
--
Safe
Netapp
Search vendor "Netapp"
 H410s Firmware
Search vendor "Netapp" for product "H410s Firmware"
--
Affected
in Netapp
Search vendor "Netapp"
 H410s
Search vendor "Netapp" for product "H410s"
--
Safe