Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix server->total_read for compound encrypted PDUs In receive_encrypted_standard(), server->total_read is left at the full decrypted frame size when walking sub-PDUs of a compound encrypted frame. As a result, cifs_handle_standard() passes this full size to smb2_check_message(), causing the PDU length guards to incorrectly validate the entire compound frame instead of the current sub-PDU. This allows truncated non-last sub-PDUs to bypass length validation, leading to out-of-bounds reads in smb2_get_data_area_len(). Fix this by setting server->total_read to the true length of the current sub-PDU: next_cmd for non-last sub-PDUs, and the remaining pdu_length for the last one.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b24df3e30cbf48255db866720fb71f14bf9d2f39 to < 8703539d22fdbc13dd2db090ee199c3a427b8ea0affectedb24df3e30cbf48255db866720fb71f14bf9d2f39 to < e78fc1d240b27349b45a0f1c3e3c2c401d7e230daffectedb24df3e30cbf48255db866720fb71f14bf9d2f39 to < a46eb242e9eef3a3897d166748b23303c516e870affectedb24df3e30cbf48255db866720fb71f14bf9d2f39 to < ebb8a075fdc7af3d196a4f158a0e18dbc394c0e3affectedb24df3e30cbf48255db866720fb71f14bf9d2f39 to < 282b72f9a7ef31296c48366db4128882999cc048affectedb24df3e30cbf48255db866720fb71f14bf9d2f39 to < f73726b83e4756fdaa099e1bc1143293bd57ad79affected
Linux Linux
Default version status: affected
4.19affected0 to < 4.19unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.112 to ≤ 6.12.*unaffected6.18.54 to ≤ 6.18.*unaffected7.2.8 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/8703539d22fdbc13dd2db090ee199c3a427b8ea0 ↗
- https://git.kernel.org/stable/c/e78fc1d240b27349b45a0f1c3e3c2c401d7e230d ↗
- https://git.kernel.org/stable/c/a46eb242e9eef3a3897d166748b23303c516e870 ↗
- https://git.kernel.org/stable/c/ebb8a075fdc7af3d196a4f158a0e18dbc394c0e3 ↗
- https://git.kernel.org/stable/c/282b72f9a7ef31296c48366db4128882999cc048 ↗
- https://git.kernel.org/stable/c/f73726b83e4756fdaa099e1bc1143293bd57ad79 ↗