ELF x86 - Format string bug basic 1

15 Points  0x0

... or how to read through the stack

Author

Lu33Y,  

Level  Difficulty

Validations

11558 Challengers 3%

Note  Notation

1
2
3
4
5
507 Votes

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solutions 7 Solutions

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Challenge Results Challenge Results

Pseudo Challenge Lang Date
Master Block App - Système  ELF x86 - Format string bug basic 1 fr 22 July 2026 at 00:15
px6xocwx App - System  ELF x86 - Format string bug basic 1 en 18 July 2026 at 15:12
louis App - Système  ELF x86 - Format string bug basic 1 fr 17 July 2026 at 21:02
wypiux App - Système  ELF x86 - Format string bug basic 1 fr 16 July 2026 at 22:02
sgsrv App - Système  ELF x86 - Format string bug basic 1 fr 16 July 2026 at 21:48
Nidal__ App - System  ELF x86 - Format string bug basic 1 en 16 July 2026 at 12:44
lamashnikov App - Système  ELF x86 - Format string bug basic 1 fr 16 July 2026 at 11:06
Gedeon JEDIDJA KINGOUARI App - Système  ELF x86 - Format string bug basic 1 fr 16 July 2026 at 10:52
J.iznoo App - Système  ELF x86 - Format string bug basic 1 fr 14 July 2026 at 15:33
Julien Ogier App - Système  ELF x86 - Format string bug basic 1 fr 13 July 2026 at 21:20

challenges 93 Challenges

Results Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution Date
pas_valide ELF x86 - Stack buffer overflow basic 1 7% 27255 5 Lyes 11 25 March 2015
pas_valide ELF x64 - Basic heap overflow 1% 3374 10 sourcePerrier 1 13 February 2023
pas_valide ELF x86 - Stack buffer overflow basic 2 5% 18536 10 Lyes 10 10 April 2015
pas_valide PE32 - Stack buffer overflow basic 1% 3056 10 Ech0 8 3 December 2019
pas_valide ELF x86 - Format string bug basic 1 3% 11558 15 Lu33Y 7 8 February 2012
pas_valide ELF x64 - Stack buffer overflow - basic 3% 9017 20 Arod 7 31 May 2015
pas_valide ELF x86 - Format string bug basic 2 2% 5962 20 Lyes 5 8 April 2015
pas_valide ELF x86 - Race condition 2% 7403 20 Lu33Y 10 8 February 2012
pas_valide ELF ARM - Stack buffer overflow - basic 1% 1762 25 pickle 7 9 March 2017
pas_valide ELF MIPS - Stack buffer overflow - No NX 1% 722 25 franb 2 28 September 2018
pas_valide ELF x64 - Double free 1% 1577 25 Esad 2 23 March 2021
pas_valide ELF x86 - Stack buffer overflow basic 3 2% 6063 25 Lyes 5 10 April 2015
pas_valide ELF x86 - Use After Free - basic 1% 2516 25 Esad 3 26 May 2019
pas_valide ELF ARM - Stack Spraying 1% 378 30 pickle 4 2 April 2017
pas_valide ELF x64 - Stack buffer overflow - PIE 1% 1628 30 HomardBoy 3 26 March 2021
pas_valide ELF x86 - BSS buffer overflow 2% 4781 30 Lu33Y 7 8 February 2012
pas_valide ELF x86 - Stack buffer overflow basic 4 1% 3401 30 Lu33Y 5 8 February 2012
pas_valide ELF x86 - Stack buffer overflow basic 6 1% 3658 30 TiWim 5 10 March 2016
pas_valide ELF x86 - Format String Bug Basic 3 1% 1643 35 Lyes 2 27 May 2015
pas_valide PE32 - Advanced stack buffer overflow 1% 329 35 Ech0 4 3 December 2019
pas_valide ELF ARM - Basic ROP 1% 1017 40 pickle 6 11 March 2017
pas_valide ELF MIPS - Basic ROP 1% 259 40 dagger 1 7 October 2018
pas_valide ELF RISC-V - Intro - let’s do the ROP 1% 146 40 nobodyisnobody 1 13 February 2023
pas_valide ELF x64 - Stack buffer overflow - Stack pivot 1% 319 40 spikeroot 0 11 July 2024
pas_valide ELF x86 - Stack buffer overflow - C++ vtables 1% 1156 40 sebbb 2 20 July 2015
pas_valide PE32+ Format string bug 1% 154 45 Ech0 2 3 December 2019
pas_valide ELF x64 - Logic bug 1% 340 50 sbrk 3 8 July 2017
pas_valide ELF x86 - Bug Hunting - Several issues 1% 198 50 sbrk 3 19 January 2018
pas_valide ELF x86 - Stack buffer and integer overflow 1% 2278 50 Lu33Y 4 8 February 2012
pas_valide ELF x86 - Stack buffer overflow - ret2dl_resolve 1% 556 50 kikko 4 28 February 2019
pas_valide ELF x86 - Stack buffer overflow basic 5 1% 2152 50 Lu33Y 1 8 February 2012
pas_valide ELF x64 - Stack buffer overflow - advanced 1% 1754 55 Arod 4 5 June 2015
pas_valide ELF MIPS - Format String Glitch 1% 135 60 pickle , martin 1 21 October 2018
pas_valide ELF x64 - Heap Filling 1% 191 60 voydstack 0 27 May 2021
pas_valide ELF x86 - Information leakage with Stack Smashing Protector 1% 1086 60 Arod 3 20 May 2015
pas_valide ELF x64 - File Structure Hacking 1% 172 65 nobodyisnobody 0 27 May 2021
pas_valide ELF ARM - Race condition 1% 221 70 pickle 1 3 June 2017
pas_valide ELF x64 - Browser exploit - Intro 1% 141 70 pickle 1 2 November 2018
pas_valide ELF x64 - Buggy VM 1% 121 70 NonStandardModel 0 10 June 2022
pas_valide ELF x64 - Heap Safe-Linking Bypass 1% 160 70 nobodyisnobody 1 22 October 2021
pas_valide ELF x64 - ret2dl_init 1% 113 70 kikko 0 27 May 2021
pas_valide ELF x86 - Out of bounds attack - French Paradox 1% 188 70 sbrk 3 17 September 2017
pas_valide ELF x86 - Remote BSS buffer overflow 1% 809 75 Tosh 1 6 February 2012
pas_valide ELF x86 - Remote Format String bug 1% 1078 75 Tosh 2 6 February 2012
pas_valide PE32+ Basic ROP 1% 99 75 Ech0 0 6 December 2019
pas_valide ELF x64 - Remote heap buffer overflow - tcache 1% 370 80 franb 1 5 February 2017
pas_valide ELF x86 - Blind remote format string bug 1% 382 80 Lyes 2 8 June 2015
pas_valide LinKern ARM - vulnerable syscall 1% 256 85 pickle 1 22 March 2017
pas_valide LinKern x86 - Buffer overflow basic 1 1% 670 85 franb 3 16 February 2016
pas_valide ELF x64 - Sigreturn Oriented Programming 1% 366 90 Arod 4 25 June 2015
pas_valide LinKern x86 - Null pointer dereference 1% 628 90 franb 1 16 February 2016
pas_valide ELF x64 - Syscall chaining 1% 68 95 Njörd 1 11 July 2024
pas_valide LinKern x64 - Race condition 1% 445 95 franb 3 16 February 2016
pas_valide ELF ARM - Alphanumeric shellcode 1% 80 100 pickle 2 16 March 2017
pas_valide ELF MIPS - URLEncoded Format String bug 1% 67 100 pickle 0 7 October 2018
pas_valide ELF x64 - Blind SROP 1% 59 100 s1m 0 28 December 2023
pas_valide ELF x64 - Heap Hop 1% 212 100 nobodyisnobody 0 11 July 2024
pas_valide ELF x86 - Hardened binary 1 1% 946 100 sm0k 3 11 February 2012
pas_valide ELF x86 - Hardened binary 2 1% 756 100 sm0k 3 11 February 2012
pas_valide ELF x86 - Hardened binary 3 1% 447 100 sm0k 1 11 February 2012
pas_valide ELF x86 - Hardened binary 4 1% 533 100 sm0k 2 11 February 2012
pas_valide LinKern MIPSel - Vulnerable ioctl 1% 124 100 pickle 0 23 October 2018
pas_valide LinKern x64 - reentrant code 1% 257 100 franb 2 1 March 2016
pas_valide ELF ARM - Heap format string bug 1% 125 105 franb 1 3 June 2017
pas_valide ELF ARM - Format String bug 1% 142 110 pickle 2 14 March 2017
pas_valide ELF ARM - Use After Free 1% 155 110 pickle 0 22 March 2017
pas_valide ELF x64 - FILE structure hijacking 1% 105 110 voydstack 3 27 May 2021
pas_valide ELF x64 - Heap feng-shui 1% 140 110 laxa 2 4 August 2017
pas_valide ELF x64 - Off-by-one bug 1% 194 110 NeedToLearn 3 19 May 2016
pas_valide ELF x86 - Hardened binary 5 1% 406 110 sm0k 1 11 February 2012
pas_valide LinKern ARM - Stack Overflow 1% 112 110 pickle 0 24 July 2017
pas_valide LinKern x86 - basic ROP 1% 378 110 franb 3 6 May 2016
pas_valide ELF ARM - Heap Off-by-One 1% 111 115 pickle 1 11 March 2017
pas_valide ELF x64 - Advanced blind format string exploitation 1% 44 115 nobodyisnobody 0 11 July 2024
pas_valide ELF x64 - Remote Heap buffer overflow 1 1% 235 115 Tosh 3 26 June 2015
pas_valide ELF x86 - Hardened binary 6 1% 386 115 sm0k 3 11 February 2012
pas_valide ELF x86 - Hardened binary 7 1% 325 115 Tosh 3 21 January 2013
pas_valide ELF x86 - Remote stack buffer overflow - Hardened 1% 241 115 franb 1 17 August 2016
pas_valide LinKern x64 - RowHammer 1% 156 115 pickle 2 17 March 2019
pas_valide LinKern x64 - SLUB off-by-one 1% 138 115 Tosh 2 9 May 2019
pas_valide ELF ARM - Heap buffer overflow - Wilderness 1% 71 120 pickle 1 25 March 2017
pas_valide ELF ARM - Heap Overflow 1% 94 120 pickle 1 2 April 2017
pas_valide ELF ARM64 - Heap Underflow 1% 64 120 nobodyisnobody 0 13 February 2023
pas_valide ELF x64 - Seccomp Whitelist 1% 132 120 pickle 0 3 June 2017
pas_valide ELF x86 - Blind ROP 1% 182 120 franb 0 9 October 2016
pas_valide LinKern x64 - Memory exploration 1% 207 120 franb 2 27 July 2016
pas_valide WinKern x64 - Advanced stack buffer overflow - ROP 1% 72 120 __syscall , Synacktiv 1 27 January 2020
pas_valide WinKern x64 - Use After Free 1% 56 120 __syscall , Synacktiv 0 27 January 2020
pas_valide ELF x64 - Remote Heap buffer overflow 2 1% 188 130 Tosh , Fritz 1 1 July 2015
pas_valide ELF x64 - Advanced Heap Exploitation - Heap Leakless & Fortified 1% 94 135 nobodyisnobody 1 27 May 2021
pas_valide ELF x64 - Blind ROP 1% 149 135 franb 1 10 March 2018
pas_valide ELF x64 - Browser exploit - BitString 1% 56 135 pickle 0 15 December 2018
pas_valide ELF ARM64 - Multithreading 1% 61 140 franb 0 13 February 2023