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New video on format string vulnerabilities. It's the classic printf(user) bug. An attacker can read and write almost any memory in the process, from a single print statement. I walk through all of it in a live GDB session. Leaking the stack with %p, turning %n into an arbitrary... show more
13,117 görüntüleme • 1 ay önce •via X (Twitter)
8 Yorum

acidburn1 ay önce
java devs discovering printf can spawn a shell

tetsuo1 ay önce
I'll cover Apache Log4j next. 😂

Pitchfork & Torch ♞1 ay önce
Hello world?

BullBear.News1 ay önce
Using percent n for arbitrary write is a clean demonstration of classic memory corruption risks.

Path of Totality1 ay önce
Quite educational thanks

Robi1 ay önce
Idź mi stąd w pizdu -90 ty kurwa pajacu .

Ricci Research1 ay önce
Beautiful illustration of the real lesson: the bug isn't a missing bounds check, it's an API where the safe call and the catastrophic one differ by four characters. Compilers have warned about this for twenty years and it still ships, which says more about how warnings get triaged than about the developers.

why1 ay önce
The single-print-statement angle really shows why printf(user) is far more dangerous than a simple crash.

