Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3874 Cisco Aironet Access Points vulnerabilities 17 October 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Aironet Access Points Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-15265 CVE-2019-15261 CVE-2019-15260 CVE-2018-0234 Reference: ESB-2018.1366.2 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-airo-dos https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-airo-pptp-dos https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-airo-unauth-access Comment: This bulletin contains three (3) Cisco Systems security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Aironet Access Points Bridge Protocol Data Unit Port Disable Denial of Service Vulnerability Priority: Medium Advisory ID: cisco-sa-20191016-airo-dos First Published: 2019 October 16 16:00 GMT Version 1.0: Final Workarounds: Yes Cisco Bug IDs: CSCvn80147 CVE-2019-15265 CWE-20 CVSS Score: 7.4 AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the bridge protocol data unit (BPDU) forwarding functionality of Cisco Aironet Access Points (APs) could allow an unauthenticated, adjacent attacker to cause an AP port to go into an error disabled state. The vulnerability occurs because BPDUs received from specific wireless clients are forwarded incorrectly. An attacker could exploit this vulnerability on the wireless network by sending a steady stream of crafted BPDU frames. A successful exploit could allow the attacker to cause a limited denial of service (DoS) attack because an AP port could go offline. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20191016-airo-dos Affected Products o Vulnerable Products At the time of publication, this vulnerability affected the following Cisco products if they were running a vulnerable software release: Aironet 1540 Series APs Aironet 1560 Series APs Aironet 1800 Series APs Aironet 2800 Series APs Aironet 3800 Series APs The first vulnerable release was 8.5. See the Details section in the bug ID (s) at the top of this advisory for the most complete and current information. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o A possible workaround for the vulnerability is to reconfigure the Aironet AP port from spanning-tree bpduguard enable to spanning-tree bpdu filtering . Fixed Software o When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Fixed Releases At the time of publication, Cisco Aironet Access Point software releases 8.5.151.0 and later, 8.8.120.0 and later, and 8.9.100.0 and later contained the fix for this vulnerability. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during the resolution of a Cisco TAC support case. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20191016-airo-dos Revision History o +---------+--------------------------+---------+--------+-----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+--------+-----------------+ | 1.0 | Initial public release. | - | Final | 2019-October-16 | +---------+--------------------------+---------+--------+-----------------+ - -------------------------------------------------------------------------------- Cisco Aironet Access Points Point-to-Point Tunneling Protocol Denial of Service Vulnerability Priority: High Advisory ID: cisco-sa-20191016-airo-pptp-dos First Published: 2019 October 16 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvk79807 CVE-2019-15261 CWE-20 CVSS Score: 8.6 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the Point-to-Point Tunneling Protocol (PPTP) VPN packet processing functionality in Cisco Aironet Access Points (APs) could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of Generic Routing Encapsulation (GRE) frames that pass through the data plane of an affected AP. An attacker could exploit this vulnerability by associating to a vulnerable AP, initiating a PPTP VPN connection to an arbitrary PPTP VPN server, and sending a malicious GRE frame through the data plane of the AP. A successful exploit could allow the attacker to cause an internal process of the targeted AP to crash, which in turn would cause the AP to reload. The AP reload would cause a DoS condition for clients that are associated with the AP. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20191016-airo-pptp-dos Affected Products o Vulnerable Products This vulnerability affects the following Cisco products if they are running a vulnerable software release: Aironet 1810 Series APs Aironet 1830 Series APs Aironet 1850 Series APs For information about which software releases are vulnerable, see the Fixed Software section of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products: Aironet 1540 Series APs Aironet 1560 Series APs Aironet 1800 Series APs not listed in the Vulnerable Products section of this advisory Aironet 2800 Series APs Aironet 3800 Series APs Aironet 4800 APs Catalyst 9100 APs Details o This vulnerability is a reintroduction of CVE-2018-0234. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases Customers are advised to upgrade to an appropriate release as indicated in the table in this section. To help ensure a complete upgrade solution, consider that this advisory is part of a collection that includes the following advisories: cisco-sa-20191016-airo-capwap-dos : Cisco Aironet Access Points and Catalyst 9100 Access Points CAPWAP Denial of Service Vulnerability cisco-sa-20191016-airo-pptp-dos : Cisco Aironet Access Points Point-to-Point Tunneling Protocol Denial of Service Vulnerability cisco-sa-20191016-airo-unauth-access : Cisco Aironet Access Points Unauthorized Access Vulnerability cisco-sa-20191016-wlc-ssh-dos : Cisco Wireless LAN Controller Secure Shell Denial of Service Vulnerability In the following table, the left column lists Cisco software releases. The center column indicates whether a release is affected by the vulnerability described in this advisory and the first release that includes the fix for this vulnerability. The right column indicates whether a release is affected by all the vulnerabilities described in this collection of advisories and which release includes fixes for those vulnerabilities. Cisco Aironet AP First Fixed Release Recommended Release for All Software Major for This Vulnerabilities Described in the Release Vulnerability Collection of Advisories Earlier than 8.0 Not vulnerable 8.5.151.0 8.0 Not vulnerable 8.5.151.0 8.1 Not vulnerable 8.5.151.0 8.2 Not vulnerable 8.5.151.0 8.3 Not vulnerable 8.5.151.0 8.4 8.5.151.0 ^1 8.5.151.0 8.5 8.5.151.0 ^1 8.5.151.0 8.6 Not vulnerable 8.8.125.0 8.7 Not vulnerable 8.8.125.0 8.8 8.8.125.0 ^2 8.8.125.0 8.9 8.9.111.0 8.9.111.0 8.10 Not vulnerable Not vulnerable 1. For Release 8.5, releases 8.5.110.0 and later, but earlier than 8.5.140.0, are not vulnerable. 2. For Release 8.8, releases earlier than 8.8.111.0 are not vulnerable. Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during the resolution of a Cisco TAC support case. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20191016-airo-pptp-dos Revision History o +---------+--------------------------+---------+--------+-----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+--------+-----------------+ | 1.0 | Initial public release. | - | Final | 2019-October-16 | +---------+--------------------------+---------+--------+-----------------+ - -------------------------------------------------------------------------------- Cisco Aironet Access Points Unauthorized Access Vulnerability Priority: Critical Advisory ID: cisco-sa-20191016-airo-unauth-access First Published: 2019 October 16 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvm54888 CVE-2019-15260 CWE-284 CVSS Score: 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X Summary o A vulnerability in Cisco Aironet Access Points (APs) Software could allow an unauthenticated, remote attacker to gain unauthorized access to a targeted device with elevated privileges. The vulnerability is due to insufficient access control for certain URLs on an affected device. An attacker could exploit this vulnerability by requesting specific URLs from an affected AP. An exploit could allow the attacker to gain access to the device with elevated privileges. While the attacker would not be granted access to all possible configuration options, it could allow the attacker to view sensitive information and replace some options with values of their choosing, including wireless network configuration. It would also allow the attacker to disable the AP, creating a denial of service (DoS) condition for clients associated with the AP. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20191016-airo-unauth-access Affected Products o Vulnerable Products This vulnerability affects the following Cisco products running a vulnerable software release: Aironet 1540 Series APs Aironet 1560 Series APs Aironet 1800 Series APs Aironet 2800 Series APs Aironet 3800 Series APs Aironet 4800 APs For information about which software releases are vulnerable, see the Fixed Software section of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products: Catalyst 9100 APs Workarounds o There are no workarounds that address this vulnerability. Fixed Software o Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases Customers are advised to upgrade to an appropriate release as indicated in the table in this section. To help ensure a complete upgrade solution, consider that this advisory is part of a collection that includes the following advisories: cisco-sa-20191016-airo-capwap-dos : Cisco Aironet Access Points and Catalyst 9100 Access Points CAPWAP Denial of Service Vulnerability cisco-sa-20191016-airo-pptp-dos : Cisco Aironet Access Points Point-to-Point Tunneling Protocol Denial of Service Vulnerability cisco-sa-20191016-airo-unauth-access : Cisco Aironet Access Points Unauthorized Access Vulnerability cisco-sa-20191016-wlc-ssh-dos : Cisco Wireless LAN Controller Secure Shell Denial of Service Vulnerability In the following table, the left column lists Cisco software releases. The center column indicates whether a release is affected by the vulnerability described in this advisory and the first release that includes the fix for this vulnerability. The right column indicates whether a release is affected by all the vulnerabilities described in this collection of advisories and which release includes fixes for those vulnerabilities. Cisco Aironet AP First Fixed Release Recommended Release for All Software Major for This Vulnerabilities Described in the Release Vulnerability Collection of Advisories Earlier than 8.0 Not vulnerable 8.5.151.0 8.0 Not vulnerable 8.5.151.0 8.1 Not vulnerable 8.5.151.0 8.2 Not vulnerable 8.5.151.0 8.3 Not vulnerable 8.5.151.0 8.4 Not vulnerable 8.5.151.0 8.5 8.5.151.0 8.5.151.0 8.6 Not vulnerable 8.8.125.0 8.7 Not vulnerable 8.8.125.0 8.8 8.8.120.0 8.8.125.0 8.9 Not vulnerable 8.9.111.0 8.10 Not vulnerable Not vulnerable Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during the resolution of a Cisco TAC support case. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20191016-airo-unauth-access Revision History o +---------+--------------------------+---------+--------+-----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+--------+-----------------+ | 1.0 | Initial public release. | - | Final | 2019-October-16 | +---------+--------------------------+---------+--------+-----------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXagB02aOgq3Tt24GAQjY/hAAoQmeXc87UpumrvBM6Lkq+QVokJMe9JFa AHMvaO/X5mbvOfESiXfbV/v4yHhBZTxB60xnyQTkgqIa5mHN2e8JEp/46a5BnqOE AbSPcTdRSENbJBiZUrzzVExq/lzYh0alBcDdcMVsem+cQSVHJVdnoia+dmaKOgQS cK0oLqVjZiDP32xJl2KAHdDgkVnrLJ17ljMqUyNdrg5ySQZvRqIQ38RpxOJL8Ecq nV/buPWon8rFaE4Gvo2UdaKIusyzP7H79OtTbvLVlmBiv5kaCvODb9HROE8FVW6n pYh0C5vIFztHlAgQQ+m7XaRbR81RkV846UKgzVgZClOtvfjq5un+zHdnvj2KN2pH XR9I0Y9S4Bzo8rSY1XeaBBVqWBjuXVXtFqmqlZYCjot5xKo2t7JEqk00u5/6KNf9 pG13+JuE8kXjtQ/41kdQZPU5w8EpEkHVTAVU/PNyhjNpIh6mHdQEZtysAQjuq2vB K5ciI2iP/wE7lb9nfCNex9Sos8jQSglnBqrdhbOpKZVyTAzaLXZokq+i22pLpXpq 2PxQPhcH6wsSvPo1njHu6TiJULT0t3Kgufw7ImghLgxAWXVaW07ZPhoODl9FevFp 8OLwpfzD5+117yOcgVoXSvCgcUGzipw9tFRB4W+pfRhBHY6QjJMI9izH1EsoxF8e VDcic0A8+Ak= =6Cyv -----END PGP SIGNATURE-----