Cisco AnyConnect Secure Mobility Client and Secure Desktop contain a vulnerability that could allow an unauthenticated, remote attacker to to replace software components. Updates are available.
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.
Cisco AnyConnect Secure Mobility Client versions prior to 3.0 MR8 and Cisco Secure Desktop versions prior to 3.6.6020 are vulnerable.
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.
An unauthenticated, remote attacker could exploit this vulnerability to replace software components with an older version, affecting application functionality or introducing additional vulnerabilities.
The vulnerability is due to insufficient validation of input by the Cisco AnyConnect Secure Mobility Client and Secure Desktop WebLaunch ActiveX and Java components.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious website. The processing of input that is supplied by the malicious website could cause the software to download and install an older but signed version of the affected software.? The installation of an older version of the software could invalidate current configurations, change functionality, and introduce vulnerabilities that may be present in older versions of the software.
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 firstname.lastname@example.org.
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