Cisco AnyConnect Secure Mobility Client and Secure Desktop contain a vulnerability that could allow an unauthenticated, remote attacker to replace software components on a targeted system.
The vulnerability exists because the affected software performs insufficient validation of user-supplied input. An unauthenticated, remote attacker could exploit the vulnerability by convincing the user to view a malicious website. If successful, the attacker could cause the affected software to be downgraded to a prior version.
Cisco has confirmed the vulnerability in a security advisory and released software updates.
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.
The execution of the ActiveX control of java applet may require little or no user interaction, depending on the user's browser configuration, because the affected ActiveX controls and Java applets are cryptographically signed by Cisco.
Cisco has corrected this vulnerability by changing the way the WebLaunch component initiation handles downloaded signed code.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
Cisco released a security advisory for BugID CSCtx74235 at the following link: cisco-sa-20120620-ac
Administrators are advised to apply the appropriate updates.
Users are advised not to open e-mail messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.
Administrators are advised to monitor affected systems.
The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: cisco-amb-20120620-ac
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 e-mail at email@example.com.
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.
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.
Version Description Section Status Date 1.0 Initial Release NA Final 2012-Jun-20
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