linux: The ksmbd server through 3.4.2, as used in the Linux kernel through 5.15.8, sometimes communicates in cleartext even...
CVE-2021-45100 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-45100, released December 16, 2021. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.15.15-1 | DEBIAN-CVE-2021-45100 | Dec 16, 2021 |
| linux · Debian 13.5 (trixie) | 5.15.15-1 | DEBIAN-CVE-2021-45100 | Dec 16, 2021 |
| linux · Debian 14 | 5.15.15-1 | DEBIAN-CVE-2021-45100 | Dec 16, 2021 |
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