CVE-2021-45100

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.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/cifsd-team/ksmbd/pull/551	Patch Third Party Advisory
https://github.com/cifsd-team/ksmbd/issues/550	Third Party Advisory
https://marc.info/?l=linux-kernel&m=163961726017023&w=2	Third Party Advisory
https://security.netapp.com/advisory/ntap-20220107-0001/

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:ksmbd_project:ksmbd:*:*:*:*:*:*:*:*

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Information

Published : 2021-12-16 05:15

Updated : 2022-01-10 14:10

NVD link : CVE-2021-45100

Mitre link : CVE-2021-45100

JSON object : View

Products Affected

linux

linux_kernel

ksmbd_project

ksmbd

CWE

CWE-319

Cleartext Transmission of Sensitive Information

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