Cisco Security Advisory
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AV:N/AC:M/Au:N/C:N/I:P/A:N/E:POC/RL:U/RC:C
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A vulnerability in Cisco AnyConnect for Android and Mac OS X could allow an unauthenticated, remote attacker to force the rendering of an authentication form in the client.
The vulnerability is due to insufficient validation of the type of host to which AnyConnect establishes a connection. An attacker could exploit this issue by convincing a user to connect with AnyConnect to a malicious host. That host would then trick the user into sending valid credentials to the host. If successful, the attacker could discover login credentials for the user.
Cisco has confirmed the vulnerability in a security notice and has released updated software.
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 proof-of-concept exploit code exists; however, the code is not known to be publicly available.
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Customers should refer to Cisco bug IDs CSCuo24931 and CSCuo24940 for a complete list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco AnyConnect Secure Mobility Client versions 3.0 and 3.1 were vulnerable. Other versions of Cisco AnyConnect Secure Mobility Client may also be affected.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.
Administrators are advised to monitor affected systems.
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Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com for assistance.
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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 1.0 Initial Release NA Final 2015-Jan-15
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