3.1 KiB
One Gadget
{% hint style="success" %}
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Basic Information
One Gadget allows to obtain a shell instead of using system and "/bin/sh". One Gadget will find inside the libc library some way to obtain a shell (execve("/bin/sh")) using just one address.
However, normally there are some constrains, the most common ones and easy to avoid are like [rsp+0x30] == NULL As you control the values inside the RSP you just have to send some more NULL values so the constrain is avoided.
ONE_GADGET = libc.address + 0x4526a
rop2 = base + p64(ONE_GADGET) + "\x00"*100
To the address indicated by One Gadget you need to add the base address where libc is loaded.
{% hint style="success" %} One Gadget is a great help for Arbitrary Write 2 Exec techniques and might simplify ROP chains as you only need to call one address (and fulfill the requirements). {% endhint %}
{% hint style="success" %}
Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)
Support HackTricks
- Check the subscription plans!
- Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
- Share hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.