Pwntools & GDB for Buffer Overflow w/ Arguments (PicoCTF 2022 #43 'buffer-overflow2')

Поделиться
HTML-код
  • Опубликовано: 9 янв 2025

Комментарии • 38

  • @FurikuriYugi
    @FurikuriYugi 2 года назад +17

    Don't be sorry. It is important for people that are new to programing to see that despite how talented and or expierenced one is that we stil can get stumbled up on things even if it is a miss spelling that can eat away hours of your time.
    Great job as always and thank you.

  • @JohnSmith-eq5bw
    @JohnSmith-eq5bw 2 года назад +27

    I'm trying to get started in the infosec field after completing an unrelated undergraduate degree. It's fascinating stuff, but it's very easy to get discouraged. Seeing John encounter difficulties and work around them is inspirational. If a seasoned pro has a hard time with PicoCTF, that makes me feel a lot better about having a tough time applying the theory I'm learning.

    • @00killerix
      @00killerix 2 года назад

      For curiosity, what's degree have u done? :D

  • @artemis-arrow-3579
    @artemis-arrow-3579 2 года назад +3

    I'm currently learning exploit development, ur vids r rly helpful man, they give me a general idea for such things

  • @drewzilla1263
    @drewzilla1263 Год назад

    Nothing to be sorry about, John. The topic of these videos require a longer video. I love working along on these with you and I feel good when I figure things out around the same time you do, or at least I understand what you're talking about. It means I learned well form your videos so far. Thank you!

  • @_hackwell
    @_hackwell 2 года назад +2

    thanks for the video! it'll help a lot for the upcoming cyber apocalypse

  • @__hetz
    @__hetz 2 года назад +1

    I take a stab at Advent of Code every year, usually hitting the wall a bit over halfway through, and all I wanted last year was to make it on a leaderboard for the first time. I knew I'd have to do it with the easiest challenges in the first week, and it eventually happened to where I had "completed" a challenge fast enough that I would've finally made it. I was done and working in under two minutes... or I would have been except I had that same + instead of += typo on a line. It took me another 30 minutes of trying to find nonexistent bugs like index errors or off-by-ones before I realized the problem.... so maybe this year will be the year instead.
    As others have said don't beat yourself up over it because it happens to the best of us. At the same time showing these occasional struggles over simple oversights greatly humanizes the process. It reminds us that even professionals can tunnel vision themselves away from a solution that was firmly in their grasp.
    Keep up the awesome work, John!

  • @themadichib0d
    @themadichib0d 2 года назад

    Super cool, hadnt seen pwntools or gef before this, but I love how clean that exploit script looks once it was done.

  • @Whyineedachannelname
    @Whyineedachannelname 2 года назад +1

    Thanks for all the work you do it's very educative can't wait to see the next one

  • @HAGSLAB
    @HAGSLAB 2 года назад +1

    I'm sure John knows this and is just using argparse manually to learn and teach. But, for anyone interested, `pwn template` actually gives you a template for your exploit including local/remote support.

  • @FunkadelicFeed
    @FunkadelicFeed 2 года назад

    Seeing you struggle was so inspiring and encouraging. If you also have trouble sometimes then it's okay for me to struggle with almost all of the challenges 🤣

  • @thedailysenior
    @thedailysenior Год назад

    You the best!

  • @taponplaza
    @taponplaza 2 года назад

    super informative video!!

  • @alisenjary
    @alisenjary 2 года назад +2

    Very nice

  • @_AN203
    @_AN203 2 года назад

    Pwn tools seems to be targeting walk throughs which is hell helpful !!

  • @viv_2489
    @viv_2489 2 года назад

    Great python pwntool and gdb tutorial

  • @AntonioSouza
    @AntonioSouza 2 года назад

    Thank`s you John.

  • @spencerlaplaca437
    @spencerlaplaca437 2 года назад +1

    Huntington beach California here

  • @kostyatitovsky9983
    @kostyatitovsky9983 2 года назад

    Hello, John! Read about subparser for argparse ;)

  • @oliverthomas700
    @oliverthomas700 2 года назад

    Hi John, thanks for another great video!
    I have a question about reading the value of ebp, when you have set it to cafef00d. I know the ebp+0x8 is cafec00d but when I do the
    "x $ebp+0x8" it prints "
    \360\376\312
    \360\003". Why is that? 🙂

  • @0xSebin
    @0xSebin 2 года назад

    John please do more videos related to Buffer overflow ...

  • @redspotaquashrimps
    @redspotaquashrimps 2 года назад

    Very cool! How many hours you spend per day doing this stuff before you know what you're doing from daily work to late night I suppose? :)

  • @KaliMax1337
    @KaliMax1337 2 года назад

    John, these are great vids- thanks! just starting out and really like rev eng but aside from CTF's , how is this an in demand skill for the real world?

    • @nekosalad8308
      @nekosalad8308 2 года назад

      i think blue team seniors do rev eng. its not a junior level skill afaik.

  • @bhagyalakshmi1053
    @bhagyalakshmi1053 Год назад

    Arg 1to transfer arg 2

  • @gothops154
    @gothops154 2 года назад

    44:58 armchair programming here, but (not x OR no y) is just (x AND y)

    • @_JohnHammond
      @_JohnHammond  2 года назад +1

      I might be stupid but I don't think that's true?
      IF ( NOT x OR NOT y) doesn't that mean either x could be 0 or y could be 0, the logic succeeds-- while with IF ( x AND y ), the logic only succeeds if both x is 1 and y is 1?

    • @intuital
      @intuital 2 года назад +1

      Actually, it's equal to NOT (x AND y). de Morgan's Theorem.

  • @bhagyalakshmi1053
    @bhagyalakshmi1053 Год назад

    Integer value given?
    Integer over /underflow what tlime.

  • @bhagyalakshmi1053
    @bhagyalakshmi1053 Год назад

    Not 0?

  • @fr0x41nk
    @fr0x41nk 11 месяцев назад

    I don’t know Seth Rogan was in infosec

  • @bhagyalakshmi1053
    @bhagyalakshmi1053 Год назад

    Part 2

  • @v2nd2tt44
    @v2nd2tt44 2 года назад

    man still playing pico ctf 🕴..

  • @bhagyalakshmi1053
    @bhagyalakshmi1053 Год назад

    R vilu number what uuink k collections.

  • @bhagyalakshmi1053
    @bhagyalakshmi1053 Год назад

    Byipas

  • @databang
    @databang 2 года назад

    f̸̫̱̑̒͋͂͐͋̋̐̕u̶̼̻̦̥͔̍̈́͒̆͗̃̀͂͆̚z̶̨̨̢̛̲̰̯̹͍͚͕̒͑z̸̡̛͙̖͖y̵̪̜̞͇̜͕̏̅̈́͌̀̎̕L̶̢̛̫͉͓̙̏͛̓̈́̽o̴̪͈͓̮͐̋̐̇͒̑͊̊̕ģ̷̭͕̽͊̈́̋̀͛́ỉ̵̼̮̹̖̙̣̘͔̞͜c̵̙͙̍̈́̈́̄͆̌̆̈́͘F̶̦̈̆̏̊̈́̈́͘͝Ṭ̴̛͙̺̰̬͇̫̟̞̃̀̈́́̚̚͝W̶̬̺͓̯͕̿̒

  • @bhagyalakshmi1053
    @bhagyalakshmi1053 Год назад

    Haaa part 2, 3, 4 opening 🪟