The interaction machine is what allows for interactive menus and games in DVD Videos.

The IFO file format is probably the simplest format used, and is responsible for storing the metadata that links the video files together. For the proprietary aspects there are some freely accessible unofficial references. Whilst the complete DVD Video specification is unfortunately behind a paywall, it is comprised largely of open formats like MPEG, just bundled together in a proprietary container format (VOB). If we think about what a DVD Video consists of there are quite a few main components, each with the potential for vulnerabilities: The console supports playing burned DVD video discs, which exposes significant attack surface we could potentially exploit to achieve our goal. Obviously we can't just burn a disc containing an ELF file and expect the PS2 to boot it we'll need to exploit some kind of software vulnerability related to parsing of controlled data. This leaves an interesting question which I've wanted to solve since I was a child: But unlike say the Nintendo 64, where we don't really have any other choice but to resort to exploiting games over interfaces like modems, the PlayStation 2 has one key difference: its primary input is optical media (CD / DVD discs), a format which anyone can easily burn with readily available consumer hardware. The PlayStation 2 has other sources of untrusted input that we could attack games which support online multiplayer or USB storage could almost definitely be exploited. I decided to write-off that exploit as being impractical, and so the hunt continued for a better attack scenario for the PlayStation 2. Although I was successful at producing the first software based entry-point exploit that can be triggered using only hardware that came with the console, the attack was largely criticized due to the requirement of having to enter the payload manually through the controller or keyboard, and limitation of being PAL only. My initial attempt to solve this problem was to exploit the BASIC interpreter that came bundeld with early PAL region PS2s. For the best selling console of all time, it deserves better hacks.

You need to either purchase a memory card with an exploit pre-installed (or a memory card to USB adapter), a HDD expansion bay (not available to slim consoles), open up the console to block the disc tray sensors, or install a modchip. I've previously discussed how the PlayStation 2 doesn't have any good entry-point software exploits for launching homebrew. FreeDVDBoot - Hacking the PlayStation 2 through its DVD player Initial publication: June 27, 2020

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