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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1650 Cisco AnyConnect Client for Windows Privilege Escalation Vulnerability 25 June 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco AnyConnect Secure Mobility Client Publisher: Cisco Systems Operating System: Windows Impact/Access: Administrator Compromise -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2015-4211 Original Bulletin: http://tools.cisco.com/security/center/viewAlert.x?alertId=39466 - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability Alert Cisco AnyConnect Client for Windows Privilege Escalation Vulnerability Threat Type: CWE-264: Permissions, Privileges, and Access Control IntelliShield ID: 39466 Version: 1 First Published: 2015 June 23 17:53 GMT Last Published: 2015 June 23 17:53 GMT Port: Not available CVE: CVE-2015-4211 Urgency: Unlikely Use Credibility: Confirmed Severity: Mild Damage CVSS Base: 6.8 CVSS Version 2.0 CVSS Temporal: 5.6 Version Summary: Cisco AnyConnect Secure Mobility Client for Windows contain a vulnerability that could allow an authenticated, local attacker to gain elevated privileges. Updates are available. Description A vulnerability in Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to install and execute an arbitrary executable file with privileges equivalent to the Microsoft Windows operating system SYSTEM account. The vulnerability is due to a lack of checks in the code for the path and filename of the file that is to be installed. An attacker could exploit this vulnerability by creating a specially modified INF file. An exploit could allow the attacker to execute commands on the underlying Microsoft Windows host with privileges equivalent to the SYSTEM account. Cisco has confirmed the vulnerability and released software updates. Warning Indicators At the time this alert was first published, Cisco AnyConnect Secure Mobility Client 3.1(60) was vulnerable. Later releases of Cisco AnyConnect Secure Mobility Client may also be vulnerable. IntelliShield Analysis To exploit this vulnerability, an attacker must authenticate and have local access to the targeted system. These requirements could reduce the likelihood of a successful exploit. This vulnerability only affects installations of the vulnerable application on Microsoft Windows operating systems. Cisco would like to thank Kostya Kortchinsky of the Google Security Team for reporting this vulnerability. Vendor Announcements Cisco has released bug ID CSCus65862 for registered users, which contains additional details and an up-to-date list of affected product versions. Impact An authenticated, local attacker could exploit this vulnerability to gain elevated privileges on a targeted device. A successful exploit could result in a complete system compromise. Technical Information The vulnerability is due to insufficient checks on the path and filename of the file that is to be installed on an affected device. An attacker could exploit this vulnerability by creating a specially modified INF file. An exploit could allow the attacker to execute commands on the underlying Microsoft Windows host with privileges equivalent to the SYSTEM account, which could result in a complete system compromise. Safeguards Administrators are advised to apply the appropriate updates. Administrators are advised to allow only trusted users to access local systems. Administrators are advised to allow only privileged users to access administration or management 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 AnyConnect Secure Mobility Client 3.1 (60) 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. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment. 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 iQIVAwUBVYttJX6ZAP0PgtI9AQJkCA/9HkGAWGC8Hoo50hy7hu49jo/cJdLZ/7HY LpExKTNQlFgdESOwNw8+a/CxR6cLNIgMtNdBgjQhbvQ2mP51TyC5vm6BvuYm5mWL YB5s1abvfvbjvCXRT01ya4d6ZNUXjNpvXbR9eerkxGdgImxrh8jXNsuLBiS4+Ump n5OTtEach7CE6VrBZjFqTg3R0fykg4orXh6oKGhYk/CmH0jJ7AcOIOJDdBwnTMpl BV31bsaIGHEZ8BD9OCIK9qD3L5KyG8CRmWUt4/qXQckjajPNaT6ynOdpkpw1rc4V nnzL/yW9/ye69f2TOg3Uh9Dev7lzBv8U8aIz1s45gC6w0ZnWxqD3uv5dnZ6fkqXz 1KVaRVqjX6Ckg+XXSReE1AtX2OHIjUiNmjgjj/IpvY2U0Y2w1fWLeFZ8yf72dyWT 4MHVOv1XUAo6llQTHJinTGmoauN2VLO/hjnjOUC0clwtmmj0TtW/F9JT3Gxe9yxt i08ex4jjbGTcLWMpEmodwygs/ubBpIIScNVWxXmq343a8esJz7r3VoM9xGGeeSOf cnV7xkz8XZ6x7qOfhv2grlcM9RcUcka1lE8nPclrfxQ/4PGqIDGGEt6eTIoTfe37 ttWGLeNYUZUkpn+Pp632TpCj5dIjoA//EF2FPSlDz0dIkbMDC+2Rzu45ql9hrIy8 0nqh+c+3Rik= =zyEj -----END PGP SIGNATURE-----