2017from public repositories
Square CTF 2017
15 challenges with 31 published solutions between them. CTFtime has no listing for this event at all, so nothing built on CTFtime can show what it was made of. These writeups were found in public repositories and on the authors’ own sites instead. Each repository link is pinned to the commit it was read from.
Where these writeups liveUncategorised11
The upstream scoreboard did not say, so neither do we.
ReadingBetweenTheLines
2 official solutionsLittle Doggy Tales 100
1 official solutionLittleDoggyTables
1 official solutionNeedle in a Haystack 500
1 official solutionNeedleInTheHaystack
1 official solutionPasswordChecker
1 official solutionPasswordChecker 50
1 official solutionSeventeen
1 official solutionStegasaurus 10
1 official solutionThe Robots Grandmother 50
1 official solutionTheRobotsGrandmother
1 official solution
Reverse engineering2
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
Solve it with:Strings extractor for binaries and blobsWebAssembly disassemblerJava .class disassemblerPython .pyc bytecode disassemblerLearn: Binary exploitation
Floppy
7 official solutionsGameboy
5 official solutions
Binary exploitation1
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
Solve it with:ROP gadget finderShellcode assembler and libraryCyclic pattern generator and offset finderFormat string exploit builderLearn: Binary exploitation
Forensics1
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
Solve it with:File type identifier by magic bytesMagic byte and file signature tablePCAP analyzer for CTF network forensicsEXIF metadata viewerLearn: File forensics and carvingLearn: Network forensics
robotsGrandMother
1 official solution