ELF x86 - Format string bug basic 1

15 Points  0x0

... or how to read through the stack

Author

Lu33Y,  

Level  Difficulty

Validations

6700 Challengers 4%

Note  Notation

1
2
3
4
5
357 Votes

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 5 Solutions

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Challenge Results Challenge Results

Pseudo Challenge Lang date
K-2647.adb   ELF x86 - Format string bug basic 1 7 July 2020 at 01:38
heihei   ELF x86 - Format string bug basic 1 6 July 2020 at 23:24
xyz   ELF x86 - Format string bug basic 1 6 July 2020 at 12:11
Bertrand   ELF x86 - Format string bug basic 1 6 July 2020 at 10:39
Luaz   ELF x86 - Format string bug basic 1 5 July 2020 at 01:22
Klim   ELF x86 - Format string bug basic 1 4 July 2020 at 13:38
lexios4   ELF x86 - Format string bug basic 1 3 July 2020 at 22:28
Keyoke   ELF x86 - Format string bug basic 1 2 July 2020 at 01:08
sk011   ELF x86 - Format string bug basic 1 1 July 2020 at 16:18
Witthawat   ELF x86 - Format string bug basic 1 1 July 2020 at 10:28

 75 Challenges

Results Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution
pas_valide ELF x86 - Stack buffer overflow basic 1 8% 14275 5 Lyes 11
pas_valide ELF x86 - Stack buffer overflow basic 2 6% 10260 10 Lyes 10
pas_valide PE32 - Stack buffer overflow basic 1% 502 10 Ech0 6
pas_valide ELF x86 - Format string bug basic 1 4% 6700 15 Lu33Y 5
pas_valide ELF x64 - Stack buffer overflow - basic 3% 5066 20 Arod 6
pas_valide ELF x86 - Format string bug basic 2 2% 3325 20 Lyes 5
pas_valide ELF x86 - Race condition 3% 4564 20 Lu33Y 9
pas_valide ELF ARM - Stack buffer overflow - basic 1% 916 25 pickle 7
pas_valide ELF MIPS - Stack buffer overflow - No NX 1% 280 25 franb 2
pas_valide ELF x86 - Stack buffer overflow basic 3 2% 3339 25 Lyes 3
pas_valide ELF x86 - Use After Free - basic 1% 815 25 Esad 3
pas_valide PE32 - Advanced stack buffer overflow 1% 88 25 Ech0 3
pas_valide ELF ARM - Stack Spraying 1% 161 30 pickle 4
pas_valide ELF x86 - BSS buffer overflow 2% 3264 30 Lu33Y 7
pas_valide ELF x86 - Stack buffer overflow basic 4 2% 2164 30 Lu33Y 5
pas_valide ELF x86 - Stack buffer overflow basic 6 2% 1954 30 TiWim 5
pas_valide ELF x86 - Format String Bug Basic 3 1% 880 35 Lyes 2
pas_valide ELF ARM - Basic ROP 1% 459 40 pickle 5
pas_valide ELF MIPS - Basic ROP 1% 82 40 dagger 1
pas_valide ELF x86 - Stack buffer overflow - C++ vtables 1% 630 40 sebbb 2
pas_valide PE32+ Format string bug 1% 42 40 Ech0 1
pas_valide ELF x64 - Logic bug 1% 136 50 sbrk 3
pas_valide ELF x86 - Bug Hunting - Several issues 1% 68 50 sbrk 1
pas_valide ELF x86 - Stack buffer and integer overflow 1% 1558 50 Lu33Y 3
pas_valide ELF x86 - Stack buffer overflow - ret2dl_resolve 1% 131 50 kikko 0
pas_valide ELF x86 - Stack buffer overflow basic 5 1% 1430 50 Lu33Y 1
pas_valide ELF x64 - Stack buffer overflow - advanced 1% 914 55 Arod 4
pas_valide ELF MIPS - Format String Glitch 1% 37 60 pickle, martin 1
pas_valide ELF x86 - Information leakage with Stack Smashing Protector 1% 662 60 Arod 2
pas_valide ELF ARM - Race condition 1% 93 70 pickle 1
pas_valide ELF x64 - Browser exploit - Intro 1% 53 70 pickle 1
pas_valide ELF x86 - Out of bounds attack - French Paradox 1% 79 70 sbrk 3
pas_valide ELF x86 - Remote BSS buffer overflow 1% 658 75 Tosh 1
pas_valide ELF x86 - Remote Format String bug 1% 818 75 Tosh 2
pas_valide PE32+ Basic ROP 1% 18 75 Ech0 0
pas_valide ELF x64 - Remote heap buffer overflow - fastbin 1% 204 80 franb 1
pas_valide ELF x86 - Blind remote format string bug 1% 233 80 Lyes 1
pas_valide LinKern ARM - vulnerable syscall 1% 93 85 pickle 0
pas_valide LinKern x86 - Buffer overflow basic 1 1% 339 85 franb 2
pas_valide LinKern x86 - Null pointer dereference 1% 342 90 franb 0
pas_valide LinKern x64 - Race condition 1% 213 95 franb 0
pas_valide ELF ARM - Alphanumeric shellcode 1% 29 100 pickle 2
pas_valide ELF MIPS - URLEncoded Format String bug 1% 17 100 pickle 0
pas_valide ELF x86 - Hardened binary 1 1% 573 100 sm0k 3
pas_valide ELF x86 - Hardened binary 2 1% 456 100 sm0k 3
pas_valide ELF x86 - Hardened binary 3 1% 286 100 sm0k 1
pas_valide ELF x86 - Hardened binary 4 1% 318 100 sm0k 2
pas_valide LinKern MIPSel - Vulnerable ioctl 1% 32 100 pickle 0
pas_valide LinKern x64 - reentrant code 1% 110 100 franb 1
pas_valide ELF ARM - Heap format string bug 1% 54 105 franb 0
pas_valide ELF x64 - Sigreturn Oriented Programming 1% 190 105 Arod 3
pas_valide ELF ARM - Format String bug 1% 68 110 pickle 1
pas_valide ELF ARM - Use After Free 1% 65 110 pickle 0
pas_valide ELF x64 - Heap feng-shui 1% 51 110 laxa 2
pas_valide ELF x64 - Off-by-one bug 1% 96 110 NeedToLearn 2
pas_valide ELF x86 - Hardened binary 5 1% 245 110 sm0k 1
pas_valide LinKern ARM - Stack Overflow 1% 37 110 pickle 0
pas_valide LinKern x86 - basic ROP 1% 167 110 franb 1
pas_valide ELF ARM - Heap Off-by-One 1% 37 115 pickle 1
pas_valide ELF x64 - Remote Heap buffer overflow 1 1% 127 115 Tosh 3
pas_valide ELF x86 - Hardened binary 6 1% 229 115 sm0k 3
pas_valide ELF x86 - Hardened binary 7 1% 192 115 Tosh 3
pas_valide ELF x86 - Remote stack buffer overflow - Hardened 1% 114 115 franb 1
pas_valide LinKern x64 - RowHammer 1% 42 115 pickle 1
pas_valide LinKern x64 - SLUB off-by-one 1% 26 115 Tosh 1
pas_valide ELF ARM - Heap buffer overflow - Wilderness 1% 23 120 pickle 1
pas_valide ELF ARM - Heap Overflow 1% 25 120 pickle 1
pas_valide ELF x64 - Seccomp Whitelist 1% 38 120 pickle 0
pas_valide ELF x86 - Blind ROP 1% 92 120 franb 0
pas_valide Linkern x64 - Memory exploration 1% 75 120 franb 1
pas_valide WinKern x64 - Advanced stack buffer overflow - ROP 1% 8 120 __syscall, Synacktiv 0
pas_valide WinKern x64 - Use After Free 1% 5 120 __syscall, Synacktiv 0
pas_valide ELF x64 - Remote Heap buffer overflow 2 1% 94 130 Tosh, Fritz 1
pas_valide ELF x64 - Blind ROP 1% 61 135 franb 1
pas_valide ELF x64 - Browser exploit - BitString 1% 19 135 pickle 0