VAR-201201-0090

Vulnerability from variot - Updated: 2025-04-11 20:23

The Wi-Fi Protected Setup (WPS) protocol, when the "external registrar" authentication method is used, does not properly inform clients about failed PIN authentication, which makes it easier for remote attackers to discover the PIN value, and consequently discover the Wi-Fi network password or reconfigure an access point, by reading EAP-NACK messages. In addition, multiple wireless routers do not have a function to deal with brute force attacks, making attacks even easier. (2012 Year 1 Moon 6 Day - Postscript ) JPCERT/CC Has confirmed that the attack tool has been made public.By a third party who has access to the device, EAP-NACK By reading the message, Wi-Fi You may get your network password. As a result, the content of the communication may be intercepted or used as a foothold for further attacks. An attacker can exploit this issue to bypass the authentication process and gain unauthorized access to the affected system. Successfully exploiting this issue may lead to further attacks. Huawei B153 3G/UMTS router WPS weakness =======================================

[ADVISORY INFORMATION] Title: Huawei B153 3G/UMTS router WPS weakness Discovery date: 21/05/2013 Release date: 05/08/2013 Advisory URL: http://blog.emaze.net/2013/08/huawei-b153-3gumts-router-wps-weakness.html Credits: Roberto Paleari (roberto.paleari@emaze.net, @rpaleari) Alessandro Di Pinto (alessandro.dipinto@emaze.net, @adipinto)

[VULNERABILITY INFORMATION] Class: Authentication bypass

[AFFECTED PRODUCTS] We confirm the presence of the security vulnerability on the following products/firmware versions: * Huawei B153 3G/UMTS router, software version 1096.11.405.03.111sp02

Other device models and firmware versions are probably also vulnerable, but they were not checked.

As required by the ISP that distributes this device to end-users, we do not disclose the full commercial name of the product, but only the manufacturer device model (i.e., Huawei B153).

In the default device configuration, the WPS daemon is configured to accept WPS PIN authentication attempts, but no WPS PIN is configured. Thus, the device is supposed to reject any possible PIN-based WPS request, allowing only the "push button" mechanism, that requires physical interaction.

Unfortunately we detected that, despite no WPS PIN is actually configured, a specially-crafted WPS session can still force the device to complete the "External Registrar" handshake, returning to the attacker the current WPA2 passphrase. In other terms attackers located within the wireless range of the device can instantly recover the WPA passphrase. We would also like to stress out that this vulnerability is present in the default device configuration, and no user action is required. As a consequence, we implemented our proof-of-concept as a small patch to the reaver WPS cracking tool [3] (the unmodified version of reaver cannot recover the password for this device).

[COPYRIGHT] Copyright(c) Emaze Networks S.p.A 2013, All rights reserved worldwide. Permission is hereby granted to redistribute this advisory, providing that no changes are made and that the copyright notices and disclaimers remain intact.

[DISCLAIMER] Emaze Networks S.p.A is not responsible for the misuse of the information provided in our security advisories. These advisories are a service to the professional security community. There are NO WARRANTIES with regard to this information. Any application or distribution of this information constitutes acceptance AS IS, at the user's own risk. This information is subject to change without notice. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

                National Cyber Alert System

          Technical Cyber Security Alert TA12-006A

Wi-Fi Protected Setup (WPS) Vulnerable to Brute-Force Attack

Original release date: January 06, 2012 Last revised: -- Source: US-CERT

Systems Affected

Most Wi-Fi access points that support Wi-Fi Protected Setup (WPS) are affected.

I. Description

WPS uses a PIN as a shared secret to authenticate an access point and a client and provide connection information such as WEP and WPA passwords and keys. In the external registrar exchange method, a client needs to provide the correct PIN to the access point.

An attacking client can try to guess the correct PIN.

For further details, please see Vulnerability Note VU#723755 and further documentation by Stefan Viehbock and Tactical Network Solutions.

II. Impact

An attacker within radio range can brute-force the WPS PIN for a vulnerable access point. The attacker can then obtain WEP or WPA passwords and likely gain access to the Wi-Fi network. Once on the network, the attacker can monitor traffic and mount further attacks.

III. Solution

Update Firmware

Check your access point vendor's support website for updated firmware that addresses this vulnerability. Further information may be available in the Vendor Information section of VU#723755 and in a Google spreadsheet called WPS Vulnerability Testing.

Disable WPS

Depending on the access point, it may be possible to disable WPS. Note that some access points may not actually disable WPS when the web management interface indicates that WPS is disabled.

IV. Please send email to cert@cert.org with "TA12-006A Feedback VU#723755" in the subject.

For instructions on subscribing to or unsubscribing from this mailing list, visit http://www.us-cert.gov/cas/signup.html.

Produced 2012 by US-CERT, a government organization.

Terms of use:

 <http://www.us-cert.gov/legal.html>

Revision History

January 06, 2012: Initial release

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    "data": "The Wi-Fi Protected Setup (WPS) protocol, when the \"external registrar\" authentication method is used, does not properly inform clients about failed PIN authentication, which makes it easier for remote attackers to discover the PIN value, and consequently discover the Wi-Fi network password or reconfigure an access point, by reading EAP-NACK messages. In addition, multiple wireless routers do not have a function to deal with brute force attacks, making attacks even easier. (2012 Year 1 Moon 6 Day - Postscript ) JPCERT/CC Has confirmed that the attack tool has been made public.By a third party who has access to the device, EAP-NACK By reading the message, Wi-Fi You may get your network password. As a result, the content of the communication may be intercepted or used as a foothold for further attacks. \nAn attacker can exploit this issue to bypass the authentication process and gain unauthorized access to the affected system. Successfully exploiting this issue may lead to further attacks. \nHuawei B153 3G/UMTS router WPS weakness\n=======================================\n\n[ADVISORY INFORMATION]\nTitle:\t\tHuawei B153 3G/UMTS router WPS weakness\nDiscovery date: 21/05/2013\nRelease date:   05/08/2013\nAdvisory URL:   http://blog.emaze.net/2013/08/huawei-b153-3gumts-router-wps-weakness.html\nCredits: \tRoberto Paleari     (roberto.paleari@emaze.net, @rpaleari)\n\t\tAlessandro Di Pinto (alessandro.dipinto@emaze.net, @adipinto)\n\n[VULNERABILITY INFORMATION]\nClass: \t        Authentication bypass\n\n[AFFECTED PRODUCTS]\nWe confirm the presence of the security vulnerability on the following\nproducts/firmware versions:\n   * Huawei B153 3G/UMTS router, software version 1096.11.405.03.111sp02\n\nOther device models and firmware versions are probably also vulnerable, but\nthey were not checked. \n\nAs required by the ISP that distributes this device to end-users, we do not\ndisclose the full commercial name of the product, but only the manufacturer\ndevice model (i.e., Huawei B153). \n\nIn the default device configuration, the WPS daemon is configured to accept WPS\nPIN authentication attempts, but no WPS PIN is configured. Thus, the device is\nsupposed to reject any possible PIN-based WPS request, allowing only the \"push\nbutton\" mechanism, that requires physical interaction. \n\nUnfortunately we detected that, despite no WPS PIN is actually configured, a\nspecially-crafted WPS session can still force the device to complete the\n\"External Registrar\" handshake, returning to the attacker the current WPA2\npassphrase. In other terms attackers located within the wireless range of the\ndevice can instantly recover the WPA passphrase. We would also like to stress\nout that this vulnerability is present in the default device configuration, and\nno user action is required. As a consequence, we implemented our\nproof-of-concept as a small patch to the reaver WPS cracking tool [3] (the\nunmodified version of reaver *cannot* recover the password for this device). \n\n[COPYRIGHT]\nCopyright(c) Emaze Networks S.p.A 2013, All rights reserved worldwide. \nPermission is hereby granted to redistribute this advisory, providing that no\nchanges are made and that the copyright notices and disclaimers remain intact. \n\n[DISCLAIMER]\nEmaze Networks S.p.A is not responsible for the misuse of the information\nprovided in our security advisories. These advisories are a service to the\nprofessional security community. There are NO WARRANTIES with regard to this\ninformation. Any application or distribution of this information constitutes\nacceptance AS IS, at the user\u0027s own risk. This information is subject to change\nwithout notice. \n-----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA1\n\n\n                    National Cyber Alert System\n\n              Technical Cyber Security Alert TA12-006A\n\n\nWi-Fi Protected Setup (WPS) Vulnerable to Brute-Force Attack\n\n   Original release date: January 06, 2012\n   Last revised: --\n   Source: US-CERT\n\n\nSystems Affected\n\n   Most Wi-Fi access points that support Wi-Fi Protected Setup (WPS)\n   are affected. \n\n\nI. Description\n\n   WPS uses a PIN as a shared secret to authenticate an access point\n   and a client and provide connection information such as WEP and WPA\n   passwords and keys. In the external registrar exchange method, a\n   client needs to provide the correct PIN to the access point. \n\n   An attacking client can try to guess the correct PIN. \n\n   For further details, please see Vulnerability Note VU#723755 and\n   further documentation by Stefan Viehbock and Tactical Network\n   Solutions. \n\n\nII. Impact\n\n   An attacker within radio range can brute-force the WPS PIN for a\n   vulnerable access point. The attacker can then obtain WEP or WPA\n   passwords and likely gain access to the Wi-Fi network. Once on the\n   network, the attacker can monitor traffic and mount further\n   attacks. \n\n\nIII. Solution\n\n   Update Firmware\n\n   Check your access point vendor\u0027s support website for updated\n   firmware that addresses this vulnerability. Further information may\n   be available in the Vendor Information section of VU#723755 and in\n   a Google spreadsheet called WPS Vulnerability Testing. \n\n   Disable WPS\n\n   Depending on the access point, it may be possible to disable WPS. \n   Note that some access points may not actually disable WPS when the\n   web management interface indicates that WPS is disabled. \n\n\nIV. Please send\n   email to \u003ccert@cert.org\u003e with \"TA12-006A Feedback VU#723755\" in\n   the subject. \n ____________________________________________________________________\n\n   For instructions on subscribing to or unsubscribing from this\n   mailing list, visit \u003chttp://www.us-cert.gov/cas/signup.html\u003e. \n ____________________________________________________________________\n\n   Produced 2012 by US-CERT, a government organization. \n\n   Terms of use:\n\n     \u003chttp://www.us-cert.gov/legal.html\u003e\n ____________________________________________________________________\n\nRevision History\n\n  January 06, 2012: Initial release\n\n\n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1.4.5 (GNU/Linux)\n\niQEVAwUBTwdgcT/GkGVXE7GMAQLtAQgAtUPVSW+g9O7PdjUab+1XGBHUN4S1cZxX\nO3d9r3S6U282dPATsU5tTVj9ovfrngm6f4Rs4wZO1SC80FfQZ04+37gabuab0/G0\nbXI8OUzMiKh8nEI55KREkDOCVouZgKqIGw1Hn3oXaqPL2wYSY4vhf9/1yX4MYS8q\n2qvfFGtTXVeDzblzKI/8AYjh3tEFCZR06ix2YvDvvuZvJ8tupo1y+JGSYL4JSPD7\nkePOqmGSWZoc5pO08QdNYdqmBPf7QBCK3Zk/3HFCZw7WYSsQ5W8Rzz5wlLq6MY/W\n1s+L5/APkbin1sqR4abFZ85LOqBGRfXBsedAxkuDIoMTuaGZHm4wNw==\n=omg5\n-----END PGP SIGNATURE-----\n",
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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.