Multiple Vulnerabilities in Cisco Email Security Appliance
cisco-sa-20130626-esa · Critical · Published · Updated
Cisco IronPort AsyncOS Software for Cisco Email Security Appliance is affected by the following vulnerabilities: Web Framework Authenticated Command Injection Vulnerability IronPort Spam Quarantine Denial of Service Vulnerability Management GUI Denial of Service Vulnerability Successful exploitation of the Web Framework Authenticated Command Injection Vulnerability could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system with elevated privileges. Successful exploitation of either of the two denial of service vulnerabilities may cause several critical processes to become unresponsive and make the affected system unstable. Cisco has released software updates that address these vulnerabilities. Workarounds that mitigate these vulnerabilities are available. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130626-esa
The Web Framework Authenticated Command Injection Vulnerability and Management GUI Denial of Service Vulnerability could be mitigated by disabling management access to the affected system GUI.
Administrators can use the interfaceconifg command to disable appliance management via the GUI. Alternatively, this can be done via the
GUI by editing the management interface properties under Network->IP
interfaces-> Edit and then selecting Disable Appliance Management.
Note: Administrators can manage the affected system via SSH and command-line interface while GUI access is
disabled. However, not all commands and features may be available via command-line interface.
Administrators can also limit the attack surface by restricting IP addresses that can access the management interface. This can be
done using the adminaccessconfig command and selecting IPACCESS from the menu.
Administrator should also implement Cross-Site Request Forgery
protection if available on their platform and software release. This
will help limit the attack surface of the Web Framework Authenticated Command Injection Vulnerability, although it will not completely eliminate it.
The IronPort Spam Quarantine Denial of Service Vulnerability can be mitigated by disabling the end-user access to the ISQ service. Administrators can disable this access using the interfaceconfig command. Alternatively, this can be done via the
GUI by editing the settings for Spam Quarantine under Monitor->Quarantines-> Edit and then unchecking the option "Enable End-User Quarantine Access".
Note: Users will be unable to manage their safe list and block list while end-user access is disabled.
Additional workaround details are available in the companion Applied Mitigation Bulletin (AMB) at the following location: