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 the code responsible for the self-updating feature of Cisco AnyConnect Secure Mobility Client for Linux and the Cisco AnyConnect Secure Mobility Client for Mac OS X could allow an authenticated, local attacker to execute an arbitrary executable file of its choosing with privileges equivalent to the Linux or Mac OS X root account.
The vulnerability is due to lack of checks in the code for the path and filename of the file being installed. An attacker could exploit this vulnerability by invoking this functionality with a crafted installation file. A successful exploit could allow the attacker to execute commands on the underlying Linux or Mac OS X host with privileges equivalent to the root account.
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 device. These access requirements decrease the likelihood of a successful exploit.
This vulnerability can be exploited only on systems running on Linux and Mac OS platforms. Systems on Microsoft Windows platforms are not affected by this vulnerability.
Cisco indicates through the CVSS score that functional code exists; however, the code is not known to be publicly available.
This issue was reported to the Cisco PSIRT by Mr. Yorick Koster of Securify B.V. We would like to thank Mr. Koster 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 CSCuv11947 for registered users, which contains additional details and an up-to-date list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco AnyConnect Secure Mobility Client version 4.1(8) was 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 access local systems.
Administrators are advised to allow only privileged users to access administration or management 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 1.0 Cisco AnyConnect Secure Mobility Client contains a vulnerability that could allow an authenticated, local attacker to elevate privileges on a targeted account. Updates are not available. NA Final 2015-Sep-23
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