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🔒 UIUCTF 2023 / ✅-pwn-virophage
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Sutx BOT 06/30/2023 5:15 PM
Virophage - 500 points
Category: Pwn Description: This challenge is inspired by TSJ CTF 2022's "virus" challenge. I thought a virus could be even tinier, but I there's a catch: are viruses alive or dead? What separates living organisms from lifeless objects? Can viruses infect other viruses? Note: This challenge has not been solved by the author. Have fun! $ socat file:$(tty),raw,echo=0 tcp:virophage.chal.uiuc.tf:1337 Handout: Same as Zapping a Setuid 1 author: YiFei Zhu Files: No files. Tags: systems, extreme
06/30/2023 5:15 PM
Sutx pinned a message to this channel. 06/30/2023 5:15 PM
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Sutx BOT 06/30/2023 6:36 PM
@Violin wants to collaborate 🤝
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Sutx BOT 06/30/2023 7:18 PM
@Zafirr wants to collaborate 🤝
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Zafirr 06/30/2023 10:08 PM
i wonder if i should waste my time grinding this one
22:08
why not
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sahuang 06/30/2023 10:09 PM
💀 gl
22:09
if its solvable
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Zafirr 06/30/2023 10:09 PM
after i get back home tough
22:09
though*
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sahuang 06/30/2023 10:09 PM
it would be a disaster if its unsolvable but idk
22:09
hope author is not trolling
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sahuang 06/30/2023 11:17 PM
nvm it can be solved
Image attachment
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Zafirr 06/30/2023 11:55 PM
nice
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Sutx BOT 07/01/2023 2:31 AM
@chenx3n wants to collaborate 🤝
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Sutx BOT 07/01/2023 3:10 AM
@nyancat0131 wants to collaborate 🤝
03:11
✅ Well done, challenge solved!
🔥 1
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nyancat0131 07/01/2023 3:11 AM
indeed
03:11
the challenge is pretty stupid and interesting at the same time
03:12
the solution is
03:12
because it disables aslr (edited)
03:12
the stack will be fixed
03:12
it's rwx
03:12
and execve the virus file also pass in environ as well as argv
03:13
so you can pass in a null-free shellcode with nop sled
03:13
set entry point to point to it on the stack
03:13
profit
03:13
lmao
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Zafirr 07/01/2023 3:26 AM
gg
Exported 29 message(s)