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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 views • 1 month ago •via X (Twitter)
8 Comments

acidburn1 month ago
java devs discovering printf can spawn a shell

tetsuo1 month ago
I'll cover Apache Log4j next. 😂

Pitchfork & Torch ♞1 month ago
Hello world?

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

Path of Totality1 month ago
Quite educational thanks

Robi1 month ago
Idź mi stąd w pizdu -90 ty kurwa pajacu .

Ricci Research1 month ago
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 month ago
The single-print-statement angle really shows why printf(user) is far more dangerous than a simple crash.

