View source for Exploit Methods/Text overwrite

= Details =
If an attacker has a write primitive and knows where the kernel is located in memory, they could overwrite functions to do whatever they wanted. Protecting against this is the most basic of kernel memory protections: make sure the kernel is read-only.

= Examples =

* patch setuid to always succeed
* [http://itszn.com/blog/?p=21 overwrite vDSO]

= Mitigations =

* Do not leave executable memory also writable