screen-unlock.txt
Posted on 07 June 2007
_ _ _____ _ ___ _____ _ _ / / / / ____/ / / _/_ __/ / / / / /_/ / __/ / / / / / / / /_/ / / __ / /___/ /____/ / / / / __ / /_/ /_/_____/_____/___/ /_/ /_/ /_/ Helith - 0815 -------------------------------------------------------------------------------- Author: Rembrandt Date: Known since somewhere in &cant_remember Affected Software: screen <= 4.0.3 Type: Local Type: Authentication Bypass Greets go to: Helith and all affiliated People, t3c0, levent, str0ke, hdm, The EOF-Crew, rrlf, herm1t, Solar Designer, softxor, Packetstorm, FeFe, kscope, Zarathu, f0rg3, Mr. Joern Alles Disrespect goes to: A Bank [/] And others included into this case... Personal note: I wanna get MY STUFF BACK! This is the last "diplomatic" attemp made directly. Contact me if you`re interested into a deescalation. Nobody is interested into making the things even more complicated or? So make your choice. And you better hurry... And this is no blackmailing attemp but others may decide for you if you don`t do it. IMPORTENT: Turn your brain "ON" this time. -------------------------------------------------------------------------------- I didn`t found a Adv. related to this so I decided to write one. :] screen is vulnerable to a authentication bypass which allows local attackers to gain system access in case screen was locked with a Password. It has been tested on OpenBSD 4.1 + screen 4.0.3 on x86. How to reproduce: Lock screen using ctrl+x Choose a Password Confirm the Password Screen asks for a Password to unlock the screen. Just press ctrl+c. 2 seconds later the screen is unlocked and you`ve access. Have fun!
