Cisco Security Advisory
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AV:N/AC:M/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C
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Cisco AnyConnect Secure Mobility Client contains a vulnerability that could allow an unauthenticated, remote attacker to conduct man-in-the-middle attacks.
The vulnerability is due insufficient validation of certificates to be accepted by end users. An unauthenticated, remote attacker can exploit this vulnerability to impersonate trusted servers via crafted certificates. If successful, the attacker could launch further attacks.
Cisco has confirmed this vulnerability and released software updates.
Exploits of this vulnerability may require user interaction. An attacker could convince a user to visit a malicious website using a certificate that may be displayed as valid for a legitimate site. In addition, the user must be connected via the Cisco AnyConnect Secure Mobility Client for an attacker to have an attack vector to exploit this vulnerability.
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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Cisco has issued release notes for Cisco bug ID CSCtz29197 at the following link: Release Notes for Cisco AnyConnect Secure Mobility Client
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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 allow only trusted users to have network access.
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 e-mail 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 1.0 Initial Release NA Final 2012-Aug-09
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