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.