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 function that exports environment variables of Cisco ASA Software could allow an authenticated, local attacker to inject a malicious library and take complete control of the system.
The vulnerability is due to improper setting of the LD_LIBRARY_PATH environment. An attacker could exploit this vulnerability by copying a malicious library onto the affected system's external memory and triggering a reload of the system. An exploit could allow the attacker to force the affected system to load a malicious library and access the underlying Linux OS, which could lead to a full compromise of the system.
Cisco has confirmed the vulnerability in a security advisory and has released software updates.
To exploit this vulnerability, an attacker requires authenticated access to the targeted system. Authenticated access may require the attacker to access trusted, internal networks. These access requirements could limit the likelihood of a successful exploit.
Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability affects both routed and transparent firewall mode in both single and multiple context mode. To exploit this vulnerability, a reload of the system is needed. In the default configuration, Administration or privilege 15 access is needed to exploit this vulnerability.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
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Cisco has released a security advisory for bug ID CSCtq52661 at the following link: cisco-sa-20141008-asa
Vulnerable Products
Cisco has published a list of affected Cisco Adaptive Security Appliance (ASA) Software releases in the security advisory. The "Vendor Announcements" section of this alert contains a link to the advisory.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 trusted users to have network access.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected 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 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 2014-Oct-08
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