Executive Summary

Informations
Name CVE-2021-45100 First vendor Publication 2021-12-16
Vendor Cve Last vendor Modification 2022-03-29

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact None Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45100

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-319 Cleartext Transmission of Sensitive Information

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 15
Os 3422
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1

Sources (Detail)

Source Url
CONFIRM https://security.netapp.com/advisory/ntap-20220107-0001/
MISC https://github.com/cifsd-team/ksmbd/issues/550
https://github.com/cifsd-team/ksmbd/pull/551
https://marc.info/?l=linux-kernel&m=163961726017023&w=2

Alert History

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Date Informations
2022-03-31 00:23:12
  • Multiple Updates
2022-03-30 21:23:14
  • Multiple Updates
2022-03-29 21:23:09
  • Multiple Updates
2022-03-11 01:59:26
  • Multiple Updates
2022-02-26 01:56:29
  • Multiple Updates
2022-02-01 01:53:10
  • Multiple Updates
2022-01-29 01:50:42
  • Multiple Updates
2022-01-10 17:23:10
  • Multiple Updates
2021-12-22 17:22:55
  • Multiple Updates
2021-12-17 01:50:12
  • Multiple Updates
2021-12-17 01:50:11
  • Multiple Updates
2021-12-16 17:22:52
  • Multiple Updates
2021-12-16 09:22:56
  • First insertion