Conclusion

In this chapter, you learned how to exploit vulnerabilities that have filters present. Many vulnerabilities allow only ASCII-printable characters into a vulnerable buffer, or require the exploit to use Unicode. These vulnerabilities may be classified as "not exploitable," but with the proper filter and decoder, and a little creativity, they can indeed be exploited.

We covered the Venetian Method of writing a filter and presented a Roman Exploit Writer as well. The first will allow the exploitation of vulnerabilities in which Unicode filters are present; the latter allows you to overcome ASCII-printable character vulnerabilities.