Difference between revisions of "Exploit Methods/Text overwrite"

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(Created page with "= 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...")
 
(Examples)
 
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* patch setuid to always succeed
 
* patch setuid to always succeed
 +
* [http://itszn.com/blog/?p=21 overwrite vDSO]
  
 
= Mitigations =
 
= Mitigations =
  
 
* Do not leave executable memory also writable
 
* Do not leave executable memory also writable

Latest revision as of 22:02, 18 November 2015

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

Mitigations

  • Do not leave executable memory also writable