A vulnerability in the web interface of Cisco Secure ACS could allow an authenticated, remote attacker to inject operating system-level commands.
The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting operating system commands into a specific location of the ACS web interface. An exploit could allow the attacker to perform operating system-level commands without shell access, impacting the confidentiality, integrity, or availability of the system.
Cisco has confirmed this vulnerability in a security advisory and released software updates.
Indicators of Compromise
Cisco Secure Access Control System software versions prior to 5.5 are affected.
The vulnerability is due to improper input validation on fields in the device web management interface.
An authenticated, remote attacker could exploit this vulnerability by inputting malicious values into fields in the web management interface. The processing of the values could cause the device to execute arbitrary commands with elevated privileges.
To exploit the vulnerability, an attacker must
provide valid authentication credentials. The access requirement limits
the source of attacks to current users, reducing the potential for
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access affected 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.
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 firstname.lastname@example.org.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.