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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1274 Cisco Wireless LAN Controller Wireless Web Authentication Denial of Service Vulnerability 12 May 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Wireless LAN Controller Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-0723 Original Bulletin: http://tools.cisco.com/security/center/viewAlert.x?alertId=38749 - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability Alert Cisco Wireless LAN Controller Wireless Web Authentication Denial of Service Vulnerability Threat Type: CWE-399: Resource Management Errors IntelliShield ID: 38749 Version: 1 First Published: 2015 May 08 16:32 GMT Last Published: 2015 May 08 16:32 GMT Port: Not available CVE: CVE-2015-0723 Urgency: Unlikely Use Credibility: Confirmed Severity: Mild Damage CVSS Base: 6.1 CVSS Calculator CVSS Version 2.0 CVSS Temporal: 5.0 Version Summary: Cisco Wireless LAN Controller contains a vulnerability that could allow an unauthenticated, adjacent attacker to cause a denial of service condition. Updates are available. Description A vulnerability in the wireless web authentication subsystem of Cisco Wireless LAN Controller (WLC) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability exists due to improper input sanitization of a certain value that is supplied by a user prior to successfully authenticating to an affected device. An attacker could exploit this vulnerability by sending a request designed to trigger the vulnerability and cause a process crash that will trigger a restart of the device, resulting in a DoS condition. Cisco has confirmed the vulnerability and released software updates. Warning Indicators At the time this alert was first published, Cisco WLC versions 7.5.x or versions prior to 7.6.120 were vulnerable. Later versions of Cisco WLC may also be vulnerable. IntelliShield Analysis To exploit this vulnerability, an attacker must have access to the same broadcast or collision domain as the targeted device. This access requirement decreases the likelihood of a successful exploit. Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available. Vendor Announcements Cisco has released bug ID CSCum03269 for registered users, which contains additional details and an up-to-date list of affected product versions. Impact An unauthenticated, adjacent attacker could exploit this vulnerability to cause a process on an affected device to crash, resulting in a DoS condition. Technical Information The vulnerability is due to improper sanitization of a certain user-supplied value by an affected device. An unauthenticated, adjacent attacker could exploit this vulnerability by sending a request designed to trigger the vulnerability and cause a process crash that will trigger a restart of the device, resulting in a DoS condition. Safeguards Administrators are advised to apply the appropriate updates. Administrators are advised to allow only trusted users to have network access. Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems. Administrators are advised to monitor affected systems. Patches/Software Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com. Alert History Initial Release Product Sets The security vulnerability applies to the following combinations of products. Primary Products: Cisco Cisco Wireless LAN Controller (WLC) 7.5 .102.0, .102.11 | 7.6 .100.0 Associated Products: N/A - --------------------------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. 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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 iQIVAwUBVVFgIBLndAQH1ShLAQKNUg//Wefcvqf0supj7IqfT2m5jP+iTYZ7pUu2 Q2KeFEt5Vl+6lTkg4hOeu3dQKV5F9Vsay+wTCQ34obtPHtpRMgbTu//RAFY7o8p3 UWuJLIBmFiIeW3QH6NRwIXpA/N4KPjoR00SYYQaClUXW4Frg9ym22EKvpiJVGPuA XvfZD7oRfOEuu+PI6c2wwwvEjlEEJSNSVmASbkx37KeUhw7p+KS50jJ4Xba/8i7A mHk2KA0BvyUcumj7bjEq3XdsLnIgS5G/gs5djI0GuFO2qprjfxP4wRaBM6znFw/Z HX3JFPwwm/sdIE/8ohFgId7m/J3fHuQg4NVc2LvLFXzB7/CU7gCPZOGHDhWCwmLQ /IpoTJcpjnSpfsLbl2MTp8l952hDplxGFTJIHHSD4GRZfsqO7Ts/4j/3L6EDnmGz k5xlrpqpbwS/R+3+72MY21dGzZ2CK29UBiWcTuVHAGvGOLSKO8h3QiLyz67uyVav 51UC4KKBHn3k/RJEt9YK6lvP+jI4jsJDBd1UJPJH37XWXJ6/vcYXzwqn1s+GNioK 2gMp3gMPYXn5NgMVcdjxzN1kki9gPyWoSs5Jbdf+q3X8JZKEs7H0wQwAKzYInAoV 8PM0XzO+C1xes+Fm7Wy8bwhS4JI8mfMFwj5gglWYvSKgJkoDZ5VrJdtaq+JoFghx WO5d7Dv3GSk= =DIM8 -----END PGP SIGNATURE-----