Kohana Session_exception[1] - error reading session data?

Question

Kohana

Good afternoon.
Here is the problem, when checking my site for vulnerabilities, one of the programs, namely the Burp suite,
gave an error Session_exception[1] - error reading session data, and under it there is a bunch of source code.
This all happened due to the fact that Burp suite passes session='../../../../etc/paswd' to any page.
So I want to ask how dangerous it is, and how to make the kohana ignore such sessions?

Answer 1

The test program attempted to read a file that cannot be read. Kohana honestly gave a reading error - this is normal. On the contrary, it would be bad if your site gave the attacker the contents of /etc/passwd