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.
- Score
- CVSS 3.1 7.5 High
- Status
- Modified - cve@mitre.org
- Published
- 2021-12-16
- Last modified
- 2024-08-04
- Weaknesses
- CWE-319
Affected products
- Ksmbd (Ksmbd Project)
- H300e Firmware (Netapp)
- H300s Firmware (Netapp)
- H410c Firmware (Netapp)
- H410s Firmware (Netapp)
- H500e Firmware (Netapp)
- H500s Firmware (Netapp)
- H700e Firmware (Netapp)
- H700s Firmware (Netapp)
References
- 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
- https://security.netapp.com/advisory/ntap-20220107-0001/
