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Change History

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: avoid out of bounds access in decode_preauth_ctxt()

Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within
the SMB request boundary; deassemble_neg_contexts() only checks that the
eight byte smb2_neg_context header + (client controlled) DataLength are
within the packet boundary, which is insufficient.

Checking for sizeof(struct smb2_preauth_neg_context) is overkill given
that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.

https://git.kernel.org/stable/c/39f5b4b313b445c980a2a295bed28228c29228ed

https://git.kernel.org/stable/c/a2f6ded41bec1d3be643c80a5eb97f1680309001

https://git.kernel.org/stable/c/e7067a446264a7514fa1cfaa4052cdb6803bc6a2

https://git.kernel.org/stable/c/f02edb9debbd36f44efa7567031485892c7df60d