Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2571 Cisco Unified Communications Manager IM and Presence Service REST API Denial of Service Vulnerability 12 October 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Unified Communications Manager Publisher: Cisco Systems Operating System: Cisco VMware ESX Server Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2015-6310 Original Bulletin: http://tools.cisco.com/security/center/viewAlert.x?alertId=41242 - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability Alert Cisco Unified Communications Manager IM and Presence Service REST API Denial of Service Vulnerability Threat Type: CWE-399: Resource Management Errors IntelliShield ID: 41242 Version: 1 First Published: 2015 October 02 14:26 GMT Last Published: 2015 October 02 14:26 GMT Port: Not available CVE: CVE-2015-6310 Urgency: Unlikely Use Credibility: Confirmed Severity: Mild Damage CVSS Base: 5.0 CVSS Version 2.0 Version Summary: Cisco Unified Communications Manager IM and Presence Service contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are not available. Description A vulnerability in the Representational State Transfer (REST) interface of the Cisco Unified Communications Manager IM and Presence Service could allow an unauthenticated, remote attacker to cause a partial denial of service (DoS) condition because the Cisco Session Initiation Protocol (SIP) proxy service can unexpectedly restart. The vulnerability is due to lack of proper input validation of the HTTP request when it is sent to the REST interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to the REST interface of the affected application. An exploit could allow the attacker to cause a partial DoS condition because the Cisco SIP proxy service can unexpectedly restart. Cisco has confirmed the vulnerability; however, software updates are not available. Warning Indicators At the time this alert was first published, Cisco Unified Communications Manager IM and Presence Service release 11.5(1) was vulnerable. Later releases may also be vulnerable. IntelliShield Analysis To exploit the vulnerability, an unauthenticated attacker must reach the REST interface and send a crafted HTTP request to the device. This requirement may reduce 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 CSCuw31632 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 cause the Cisco SIP proxy service to stop functioning, resulting in a DoS condition. Technical Information The vulnerability is due to improper input validation of the HTTP request sent to the REST interface. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted HTTP request to the targeted device. A successful exploit could cause the Cisco SIP proxy service to restart, resulting in a DoS condition. Safeguards Administrators are advised to contact the vendor regarding future updates and releases. Administrators are advised to allow only trusted users to have network access. Administrators are advised to allow only privileged users to access administration or management systems. 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 Unified Communications Manager IM and Presence Service 11.5 (1) Associated Products: N/A LEGAL DISCLAIMER The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME. - --------------------------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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBVhsZFX6ZAP0PgtI9AQJLzhAA1OWDi9WP9PTIhYYtGOt9ZXn0Ic8zqRLo MFcU2SJ9F/2mQryQtPnyuo/u3TGkA/vh2T8eZSmJ3hmYi+O+1qmdsP3Ts/ib77hC sD8HvHYLxQ5qNcoD3GJGo8dCXf8m1nRjr+9tFYWS/7Q8GHgH1Usvd4qvJvx5tYa3 LLBVtVUhKNHwT7YduHGgeeOAhtmfBACHI7B1lwHnd4gqxKxYErk1Mf6O3SDalAaN BGMjQ8aBQJH50r1vVGSyhYG2H61AWnUGuJfVIXHzzSBsGbqP1bi9LborLX/u/33e Fd9UOZasL34Z+9BI7nkvuYoBjdu8O+mH+UMneC8NagE2ihyLl048ijpoDMsXM8wx NgtgZtIeuY+N5k/zZuwGw7DP98BlnBosD+u7o7M4f8FQuCxi5YNWSBmP45AU6O30 mth0A+yAnCnQr8ysMRJ5NuNpbY233d0JzfKfViuqTqP6oFQ98ZKDw4Syz/s798dE 8+Vq3alMW8KOFqcRLnSheBQwP1LVeR4Fv4UOaYfcbR0j/Gp1wAXP7M1cHDI9cO00 n4TVsGJ64wy7rJmMOSUmftqBoQvxDPg2k0caqiLbQPuEZWy0tm+jhtK81/IPSF68 4OC2+1naCqAO/4gvQhB76QT+wZarm2QRHU5hIEm4X6cdItMihJR0W7gO0r8+cJtD hr2RJ+Q5mrI= =j+9P -----END PGP SIGNATURE-----