Zhone Insecure Reference / Password Disclosure / Command Injection

Type packetstorm
Reporter Lyon Yang
Modified 2015-10-12T00:00:00


                                            `Vantage Point Security Advisory 2015-002  
Title: Multiple Vulnerabilities found in ZHONE  
Vendor: Zhone  
Vendor URL: http://www.zhone.com  
Device Model: ZHONE ZNID GPON 2426A  
(24xx, 24xxA, 42xx, 42xxA, 26xx, and 28xx series models)  
Versions affected: < S3.0.501  
Severity: Low to medium  
Vendor notified: Yes  
Public release:   
Author: Lyon Yang <lyon[at]vantagepoint[dot]sg> <lyon.yang.s[at]gmail[dot]com>  
1. Insecure Direct Object Reference (CVE-2014-8356)  
The administrative web application does not enforce authorization on the server side. User access is restricted via Javascript only, by display available functions for each particular user based on their privileges. Low privileged users of the Zhone Router can therefore gain unrestricted access to administrative functionality, e.g. by modifying the javascript responses returned by the Zhone web server.   
Affected URL: http://<Router URL>/menuBcm.js  
To demonstrate the issue:  
1. Set your browser proxy to Burp Suite  
2. Add the following option to "Match and Replace". Match for the string 'admin' and replace with your low privilege user:  
3. Login to the Zhone Administrative via your browser with Burp Proxy and you will have full administrative access via the Zhone Web Administrative Portal.  
2. Admin Password Disclosure (CVE-2014-8357)  
Any low-privileged user of the ZHONE Router Web Administrative Portal can obtain all users passwords stored in the ZHONE web server. The ZHONE router uses Base64 encoding to store all users passwords for logging in to the Web Administrative portal. As these passwords are stored in the backup file, a malicious user can obtain all account passwords.  
Affected URL: http://<Router URL>/  
1. Browse to  
2. "View Source" and take note of the sessionKey:  
3. Browse to http://<Router  
URL>/backupsettings.conf?action=getConfig&sessionKey=<Enter Session  
Key Here>. and all user account passwords will be returned.  
3. Remote Code Injection (CVE-2014-9118)  
Remote Command Injection in ZHONE Router Web Administrative Console  
Any user of the ZHONE Router can gain command injection on the router and can execute arbitrary commands on the host operating system via the vulnerable ZHONE router web administrative console.  
Affected URL:  
Affected Parameter:  
4. Stored Cross-Site Scripting  
The zhnsystemconfig.cgi script is vulnerable to a stored cross-site scripting attack.  
Sample HTTP Request:  
GET /zhnsystemconfig.cgi?snmpSysName=ZNID24xxA- Route&snmpSysContact=Zhone%20Global%20Support&snmpSysLocation=www.zhone.com %3Cscript%3Ealert(1)%3C/script%3E&sessionKey=1853320716 HTTP/1.1  
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:35.0) Gecko/20100101 Firefox/35.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Cookie: dm_install=no; dm_enable=no; hwaddr=54:A0:50:E4:F5:C0   
Authorization: Basic (Base 64 Encoded:<USER:PASSWORD>)  
Connection: keep-alive  
Affected Parameters:  
1. snmpSysName  
2. snmpSysLocation   
3. snmpSysContact  
5. Privilege Escalation via Direct Object Reference to Upload Settings Functionality  
A low-privileged user can patch the router settings via the /uploadsettings.cgi page. With this functionality, the malicious attacker is able to patch the admin and support password, hence gaining full administrative access to the Zhone router.  
Sample POST Request:  
POST /uploadsettings.cgi HTTP/1.1  
Accept-Encoding: gzip, deflate  
Cookie: dm_install=no; dm_enable=no; hwaddr=54:A0:50:E4:F5:C0  
Connection: keep-alive  
Content-Type: multipart/form-data; boundary=--------------------------- 75010019812050198961998600862  
Authorization: Basic (Base 64 Encoded:<USER:PASSWORD>)  
Content-Length: 88438  
Content-Disposition: form-data; name="filename"; filename="backupsettings.conf" Content-Type: config/conf  
<?xml version="1.0"?> <DslCpeConfig version="3.2">  
--- Configuration File Contents ---  
Fix Information:  
Upgrade to version S3.1.241  
2014/10: Issues No. (1 & 2) reported to Zhone  
2014/12: Issues No. (1 & 3) reported to Zhone  
2015/01: Requested Update  
2015/01: Fixes Provided by Zhone, but vulnerabilities still not fixed  
2015/02: Sent P.O.C Video to show how vulnerabilities work  
2015/03: Fixes Provided by Zhone, but vulnerabilities still not fixed  
2015/04: Requested Update  
2015/04: Issues No. (4 & 5) reported to Zhone  
2015/06: Requested Update  
2015/08: Requested Update  
2015/09: Fixes for issue 1, 4 and 5 completed by Zhone  
2015/10: Confirm that all issues has been fixed  
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