10 July 2015
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1836 Cisco TelePresence IP VCR Cross-Site Request Forgery Vulnerability 10 July 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco TelePresence IP VCR Series Publisher: Cisco Systems Operating System: Cisco Impact/Access: Cross-site Request Forgery -- Remote with User Interaction Resolution: Mitigation CVE Names: CVE-2015-4256 Original Bulletin: http://tools.cisco.com/security/center/viewAlert.x?alertId=39800 - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability Alert Cisco TelePresence IP VCR Cross-Site Request Forgery Vulnerability Threat Type: CWE-352: Cross-Site Request Forgery (CSRF) IntelliShield ID: 39800 Version: 1 First Published: 2015 July 09 21:28 GMT Last Published: 2015 July 09 21:28 GMT Port: Not available CVE: CVE-2015-4256 Urgency: Unlikely Use Credibility: Confirmed Severity: Mild Damage CVSS Base: 4.3 CVSS Version 2.0 CVSS Temporal: 4.1 Version Summary: Cisco TelePresence IP VCR Series contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site request forgery attacks. Updates are not available. Description A vulnerability in the Cisco TelePresence IP VCR Series could allow an unauthenticated, remote attacker to execute unwanted actions. The vulnerability is due to insufficient cross-site request forgery (CSRF) protection. An attacker could exploit this vulnerability by tricking the user of a web application into executing an adverse action. Cisco has confirmed the vulnerability; however, software updates are not available. Warning Indicators At the time this alert was first published, Cisco TelePresence IP VCR Series Release 3.0(1.27) was vulnerable. Later releases of Cisco TelePresence IP VCR Series may also be vulnerable. IntelliShield Analysis To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link. 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 CSCuu90736 for registered users, which contains additional details and an up-to-date list of affected product versions. Impact An unauthenticated, remote attacker could exploit this vulnerability to take unauthorized actions on behalf of a targeted user. A successful exploit could allow the attacker to conduct further attacks. Technical Information The vulnerability is due to insufficient CSRF protection by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to follow a malicious link. A successful exploit could allow the attacker to submit arbitrary requests to the affected device via the web browser with the privileges of the user, which could be used to conduct further attacks. Safeguards Administrators are advised to contact the vendor regarding future updates and releases. Users should verify that unsolicited links are safe to follow. For additional information about cross-site request forgery attacks and potential mitigation methods, see the Cisco Applied Mitigation Bulletin Understanding Cross-Site Request Forgery Threat Vectors. Administrators are advised to monitor affected systems. Patches/Software Software updates are not available. Alert History Initial Release Product Sets The security vulnerability applies to the following combinations of products. Primary Products: Cisco Cisco TelePresence IP VCR Series 3.0 1.27 Associated Products: N/A Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. 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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 iQIVAwUBVZ9Gmn6ZAP0PgtI9AQLyLRAAhqwC0uxESRE7vFRnOolDg9VPjehs6r1x jacDQXzS5DRHoY5AXU7GuLUfGGJ9lOstLDyTy6mbgStfYWhx/Y+XQhDjfy3tebG8 XkhhulcCku66S7izYjr/cxnAMuIrImMYbT98SN58AFc+Qt7fqMPl7DzlCo0eRGpu /j4zjRvJ2uvH7nboWs8lOdCW/K7JAmgSMEwZF4ul1l81FOqgUDQeYXFy7gwrNQhu zMepGwU99IdR5eJTR6HQWlZW47KtIRPDzmttL1VnHxmzGAmbRLGnKEQZSwDhIjfg JlsiLlOjt2D9r5FmxAmZep8MQNnXr292exe7CJSH/ZS2oS37DiPBmmOnuV7c+zOg wsJI1gHMV76gXOFeaaZLw0wWS9CqX1ND6dRD6sYvF96K3RfV8f/2IT0+OKy+cWFH F7hr6XDQ9BmonolWq7O7mqRK2PIj4JfKjW09PHo+VwgZhR6qNCRXW9VN6xzCVKVT HICHKNzuZNbTN/J5EY+554aZ969M4end5aGo/wuE7dkF2xBr1WZkOyGK63VsMIU8 o9+89iNZpHdbVIbUJndnstIIzNNuoPCpvPTUwjILTg3L1/INCVqGSYA/3xhRCnxs e0nyQstOIa+a1bg5vaQEsqccC0EgrEeugEk6ECA9QwUXsVz+7VUHcHWaUBu7LzmR 1bgqUVZv0PQ= =6jLS -----END PGP SIGNATURE-----