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

published December 16, 2021

CVSS
—
EPSS
1%
Percentile
59.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00909 · 59.6th percentile
Published
2021-12-16T04:37Z
EPSS history
Timeline
  • 16 DEC 04:37Z
    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
    cvelistv5