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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3904.2 Cisco Wireless LAN Controller Vulnerabilities 25 October 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Wireless LAN Controller Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-15266 CVE-2019-15262 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-wlc-pathtrav https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-wlc-ssh-dos Comment: This bulletin contains three (3) Cisco Systems security advisories. Revision History: October 25 2019: Vendor updated advisory cisco-sa-20191016-wlc-pathtrav October 18 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Wireless LAN Controller Path Traversal Vulnerability Priority: Medium Advisory ID: cisco-sa-20191016-wlc-pathtrav First Published: 2019 October 16 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvq59683 CVE-2019-15266 CWE-22 CVSS Score: 4.4 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X Summary o A vulnerability in the CLI of Cisco Wireless LAN Controller (WLC) Software could allow an authenticated, local attacker to view system files that should be restricted. This vulnerability is due to improper sanitization of user-supplied input in command-line parameters that describe filenames. An attacker could exploit this vulnerability by using directory traversal techniques to submit a path to a desired file location. A successful exploit could allow the attacker to view system files that may contain sensitive information. 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-wlc-pathtrav Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco WLC Software releases earlier than Release 8.10. 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 There are no workarounds that address this vulnerability. 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 WLC Software releases 8.10 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 internal security testing. 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-wlc-pathtrav Revision History o +---------+--------------------------+---------+--------+-----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+--------+-----------------+ | 1.0 | Initial public release. | - | Final | 2019-October-16 | +---------+--------------------------+---------+--------+-----------------+ - -------------------------------------------------------------------------------- Cisco Wireless LAN Controller Secure Shell Denial of Service Vulnerability Priority: High Advisory ID: cisco-sa-20191016-wlc-ssh-dos First Published: 2019 October 16 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvp34148 CVE-2019-15262 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 Secure Shell (SSH) session management for Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability exists because the SSH process is not properly deleted when an SSH connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly opening SSH connections to an affected device. A successful exploit could allow the attacker to exhaust system resources by initiating multiple SSH connections to the device that are not effectively terminated, which could result in a DoS condition. 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-wlc-ssh-dos Affected Products o Vulnerable Products This vulnerability affects Cisco WLC Software releases 8.5.140.0 and earlier. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Indicators of Compromise o Exploitation of this vulnerability could cause high system memory usage. It could also cause a high number of SSH connections. Customers can monitor current system memory usage by using the show memory statistics command. The following example shows the memory use information that is available in the output of this command: (Cisco Controller) > show memory statistics System Memory Statistics: Total System Memory............: 724688896 bytes (691.16 MB) Used System Memory.............: 284012544 bytes (270.87 MB) Free System Memory.............: 440676352 bytes (420.29 MB) Effective Free Memory..........: 289517568 bytes (276.12 MB) Bytes allocated from RTOS......: 12292096 bytes (11.72 MB) Chunks Free....................: 7 bytes Number of mmapped regions......: 83 Total space in mmapped regions.: 159522816 bytes (152.14 MB) Total allocated space..........: 12042392 bytes (11.48 MB) Total non-inuse space..........: 249704 bytes (243.85 KB) Top-most releasable space......: 214616 bytes (209.58 KB) Total allocated (incl mmap)....: 171814912 bytes (163.86 MB) Total used (incl mmap).........: 171565208 bytes (163.62 MB) Customers can monitor current SSH connections by using the show login-session command. The following example shows the SSH connection information that is available in the output of this command: (Cisco Controller) > show login-session ID User Name Connection From Idle Time Session Time -- --------------- --------------- ------------ ------------ 00 admin SSH 00:00:00 00:19:04 . . . 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 WLC First Fixed Release Recommended Release for All Software Major for This Vulnerabilities Described in the Release Vulnerability Collection of Advisories Earlier than 8.5.151.0 8.5.151.0 8.0 8.0 8.5.151.0 8.5.151.0 8.1 8.5.151.0 8.5.151.0 8.2 8.5.151.0 8.5.151.0 8.3 8.5.151.0 8.5.151.0 8.4 8.5.151.0 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 Not vulnerable 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-wlc-ssh-dos Revision History o +---------+--------------------------+---------+--------+-----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+--------+-----------------+ | 1.0 | Initial public release. | - | Final | 2019-October-16 | +---------+--------------------------+---------+--------+-----------------+ =============================================================================== Cisco Wireless LAN Controller Path Traversal Vulnerability Priority: Medium Advisory ID: cisco-sa-20191016-wlc-pathtrav First Published: 2019 October 16 16:00 GMT Last Updated: 2019 October 24 13:48 GMT Version 1.1: Final Workarounds: No workarounds availableCisco Bug IDs: CSCvq59683 CVE-2019-15266 CWE-22 CVSS Score: 4.4 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X Summary o A vulnerability in the CLI of Cisco Wireless LAN Controller (WLC) Software could allow an authenticated, local attacker to view system files that should be restricted. This vulnerability is due to improper sanitization of user-supplied input in command-line parameters that describe filenames. An attacker could exploit this vulnerability by using directory traversal techniques to submit a path to a desired file location. A successful exploit could allow the attacker to view system files that may contain sensitive information. 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-wlc-pathtrav Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco WLC Software releases earlier than Release 8.10. 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 There are no workarounds that address this vulnerability. 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 WLC Software releases 8.10 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 Cisco would like to thank Marcin Kopec, Fabian Beck, and Jiri Kulda of Deutsche Telekom for reporting this vulnerability. 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-wlc-pathtrav Revision History o +---------+--------------------------+---------+--------+-----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+--------+-----------------+ | | Added acknowledgments | | | | | 1.1 | for researchers who | Source | Final | 2019-October-24 | | | reported the | | | | | | vulnerability. | | | | +---------+--------------------------+---------+--------+-----------------+ | 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. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXbIl72aOgq3Tt24GAQj3+A//XeinT1wjEHfltS/CCjatOXa3qhibve9p pl6IBN+1sCWkvzkSPvh17emj4NbUuSMKwgVz/QP0Recy4idPUdhyr/RKq1o1ZV3D KTq4Gwx7tuXQV5PWLNBXuoA3gA0w2D9/+cSS02okZdWvrkylHDhz5RCVlDWOopm6 UN2Ac82ymeLO1TeBmzGkD/IzLXAyu9zgYwtWA7Icf/Je0YPBja/D3ltRFhw3uNEw gxvUiP5QAcp6LQ74W/QGg4bFt8bcOmkCi1kUpFhsywuc7TR2in0W8V7SdlNIpLaI 6C6TTMjXiN/cZR4HfQodkTBEm0hgEJ04111+TqZDGSPWRJDEV5mNaJIBdI/TTAQm GxcBtAKfTRNXYCitz8eGWmovfPoP9xcCheGrWaDZA+h6UVXgtUBffRQKaU/ybqFR N3ot94C5ix3jJw0DBuKTgD57Iekr6TddqyU4+uJgJNc3VwYPnBKnb0bQloMT5g4b A0hZuOWKHC59za9rZAtHrVbd4IomtNq1AGyeKFxvVI/io+/ISHOxH46Dhvq+m8OM SqRbdApI6fzcB0i5Y8BLDViYOEXcTa5+HA6EqRRVtp6jGMR3Ecow96Az0b5UUrZE v77il5nx+KADMQfY9V7ktbtbJTx0IKhqU/vjuELZdvLtnrat+a43q/XCMbmDCPZj AQ4+SyMM/9s= =RY4p -----END PGP SIGNATURE-----