high7.5
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.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ksmbd Project | Ksmbd | through 3.4.2 |
| Netapp | H410c Firmware | All versions |
| Netapp | H300s Firmware | All versions |
| Netapp | H500s Firmware | All versions |
| Netapp | H700s Firmware | All versions |
| Netapp | H300e Firmware | All versions |
| Netapp | H500e Firmware | All versions |
| Netapp | H700e Firmware | All versions |
| Netapp | H410s Firmware | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- 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/
- 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/