> For the complete documentation index, see [llms.txt](https://angelica.gitbook.io/hacktricks/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://angelica.gitbook.io/hacktricks/binary-exploitation/stack-overflow/pointer-redirecting.md).
# Pointer Redirecting
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[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\
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[**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
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## String pointers
If a function call is going to use an address of a string that is located in the stack, it's possible to abuse the buffer overflow to **overwrite this address** and put an **address to a different string** inside the binary.
If for example a **`system`** function call is going to **use the address of a string to execute a command**, an attacker could place the **address of a different string in the stack**, **`export PATH=.:$PATH`** and create in the current directory an **script with the name of the first letter of the new string** as this will be executed by the binary.
You can find an **example** of this in:
*
*
* 32bit, change address to flags string in the stack so it's printed by `puts`
## Function pointers
Same as string pointer but applying to functions, if the **stack contains the address of a function** that will be called, it's possible to **change it** (e.g. to call **`system`**).
You can find an example in:
*
## References
*
{% hint style="success" %}
Learn & practice AWS Hacking:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\
Learn & practice GCP Hacking: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
Support HackTricks
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
{% endhint %}