Low Level Exploits - Packet Storm

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Creating Shellcode Natively Compiled Code does not normally run in an interpreter such as a JVM. #include main(){ printf("hello, world"); } C++ Compiler Assembly Assembler Op-codes
Creating Shellcode The ELF file typically runs on a Linux/Apple/UNIX while the PE file typically runs on Windows. Elf File Format Elf Header Program Header Table Section 1 Section 2 ... Section n PE File Format MZ-DOS Header PE Signature Image File Header Section Table (Image Section Headers) Sections 1-n Section Header Table (Optional) COFF Debug Sections
Page 1 and 2: Low Level Exploits Email: hughpears
Page 3: Creating Shellcode
Page 7 and 8: Creating Shellcode Let us write an
Page 9 and 10: Creating Shellcode The output of th
Page 11 and 12: Creating Shellcode Our op-codes sho
Page 13 and 14: Buffer Overflows On the Stack
Page 15 and 16: Buffer Overflows On the Stack Stack
Page 17 and 18: Buffer Overflows On the Stack //exa
Page 19 and 20: Return to Stack
Page 21 and 22: Return to Stack As you can see in t
Page 23 and 24: Format String Vulnerabilities What
Page 25 and 26: Format String Vulnerabilities But t
Page 27 and 28: Format String Vulnerabilities Lets
Page 29 and 30: Return to LibC
Page 31 and 32: Return to LibC (Linux) Now we can s
Page 33 and 34: Return to SEH (Windows) Stack cooki
Page 35 and 36: Return to Heap
Page 37 and 38: Heap Overflows
Page 39 and 40: unlink() Technique by w00w00 When m
Page 41 and 42: unlink() Technique by w00w00 How a
Page 43 and 44: unlink() Technique by w00w00 Heap o
Page 45 and 46: unlink() Technique by w00w00 We can
Page 47 and 48: Integer Overflows
Page 49 and 50: Integer Overflows Signed 16 bit int
Page 51 and 52: Null Pointers
Page 53 and 54: Null Pointers Address space switchi
Page 55 and 56:
Null Pointers Disable OS security e
Page 57 and 58:
Null Pointers This works for 2 reas
Page 59 and 60:
Return Oriented Programming Chains
Page 61 and 62:
ROP Chains Scan executable memory r
Page 63 and 64:
ROP Chains Using a stack pivot, the
Page 65 and 66:
Questions Questions
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Low Level Exploits - Packet Storm

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