this post was submitted on 27 Jul 2024
65 points (95.8% liked)

Programming

17319 readers
123 users here now

Welcome to the main community in programming.dev! Feel free to post anything relating to programming here!

Cross posting is strongly encouraged in the instance. If you feel your post or another person's post makes sense in another community cross post into it.

Hope you enjoy the instance!

Rules

Rules

  • Follow the programming.dev instance rules
  • Keep content related to programming in some way
  • If you're posting long videos try to add in some form of tldr for those who don't want to watch videos

Wormhole

Follow the wormhole through a path of communities [email protected]

founded 1 year ago
MODERATORS
[email protected]
[email protected]
[email protected]
65
Is there an example program that illustrates how a buffer overflow attack actually executes arbitrary code? (lemmy.dbzer0.com)
submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]
27 comments fedilink hide all child comments
 

I've found lots of examples in C of programs illustrating buffer Overflows, including those of pointer rewrites which has been of great help in understanding how a buffer overflow works and memory safety etc. but I've yet to be able to find an example illustrating how such a buffer overflow can rewrite a pointer in such a way that it actually results in code execution?

Is this just not a thing, or is my google-fu rust y? Tried ChatGPT and my local Mistral and they both seem unable to spit out precisely what I'm asking, so maybe I'm wording this question wrong.

If anyone in here knows, could point me in the right direction? Thanks y'all btw love this community 🧡

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 14 points 3 months ago* (last edited 3 months ago) (1 children)

I really like this video, in it he demonstrates how a char pointer can be exploited to alter the return value in the stack and walks through an example of how it's done. https://www.youtube.com/watch?v=1S0aBV-Waeo

[–] [email protected] 1 points 3 months ago

Love computerphile!