Cisco Security Advisory
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AV:L/AC:L/Au:S/C:C/I:C/A:C/E:F/RL:OF/RC:C
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A vulnerability in Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to execute an arbitrary executable file with privileges equivalent to the Microsoft Windows operating system SYSTEM account.
The vulnerability is due to lack of checks in the code for the path to the downloader application and associated DLLs. An attacker could exploit this vulnerability by executing the downloader application from outside its expected location and providing a set of crafted DLLs. A successful exploit could allow the attacker to execute commands on the underlying Microsoft Windows host with privileges equivalent to the SYSTEM account.
Functional code that exploits this vulnerability is publicly available.
Cisco has confirmed the vulnerability and software updates are available.
To exploit this vulnerability an attacker must authenticate and have local access to the targeted system. These access requirements may reduce the likelihood of a successful exploit.
This issue was independently reported to the Cisco PSIRT by Google Project Zero and Mr. Yorick Koster of Securify B.V. We would like to thank Google Project Zero and Securify B.V. for reporting this vulnerability to Cisco and working with us towards a coordinated disclosure.
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Cisco has released bug ID CSCuv01279 for registered users, which contains additional details and an up-to-date list of affected product versions.
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to monitor affected systems.
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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.
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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.
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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.
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Show LessVersion Description Section Status Date 2.0 Functional code that demonstrates an exploit of the Cisco AnyConnect Secure Mobility Client for Windows privilege escalation vulnerability is publicly available. NA Final 2015-Sep-23 1.0 Cisco AnyConnect Secure Mobility Client for Windows contains a vulnerability that could allow an authenticated, local attacker to gain elevated privileges. Updates are not available. NA Final 2015-Sep-22
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