Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate owner of durable handle on reconnect Currently, ksmbd does not verify if the user attempting to reconnect to a durable handle is the same user who originally opened the file. This allows any authenticated user to hijack an orphaned durable handle by predicting or brute-forcing the persistent ID. According to MS-SMB2, the server MUST verify that the SecurityContext of the reconnect request matches the SecurityContext associated with the existing open. Add a durable_owner structure to ksmbd_file to store the original opener's UID, GID, and account name. and catpure the owner information when a file handle becomes orphaned. and implementing ksmbd_vfs_compare_durable_owner() to validate the identity of the requester during SMB2_CREATE (DHnC).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8df4bcdb0a4232192b2445256c39b787d58ef14d before 712cdf917e77a6444ce3836874829d770db20ee6; affected c8efcc786146a951091588e5fa7e3c754850cb3c before c7f0f0d01c88bdcb8b1694d7d321670013f7ed7d; affected c8efcc786146a951091588e5fa7e3c754850cb3c before 00ce8d6789dae72d042a4522264964c72891ca37; affected c8efcc786146a951091588e5fa7e3c754850cb3c before c908c853f304a4969b5aa10eba0b50350cc65b80; affected c8efcc786146a951091588e5fa7e3c754850cb3c before 49110a8ce654bbe56bef7c5e44cce31f4b102b8a; affected 6.6.32 before 6.6.142 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.6.142 through 6.6.*; unaffected 6.12.92 through 6.12.*; unaffected 6.18.25 through 6.18.*; unaffected 7.0.2 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/712cdf917e77a6444ce3836874829d770db20ee6
- https://git.kernel.org/stable/c/c7f0f0d01c88bdcb8b1694d7d321670013f7ed7d
- https://git.kernel.org/stable/c/00ce8d6789dae72d042a4522264964c72891ca37
- https://git.kernel.org/stable/c/c908c853f304a4969b5aa10eba0b50350cc65b80
- https://git.kernel.org/stable/c/49110a8ce654bbe56bef7c5e44cce31f4b102b8a