Cisco DPC2420 Wireless Residential Gateway contains multiple vulnerabilities that could allow an unauthenticated, remote attacker to bypass security restrictions, access sensitive information, or conduct cross-site scripting attacks on a targeted system.
The vulnerability is due to improper security restrictions imposed by the affected software. When the remote configuration option is enabled, an attacker could download the configuration file with the parameters of filename.gwc=20
via TCP port 8080. Successful exploitation could allow an attacker to access sensitive information that could be used to conduct further attacks.
A third vulnerability is due to the authentication type of the web interface on the affected device. An attacker could exploit this vulnerability by perform ARP poisoning attacks on a targeted device to obtain the Base64-encoded password. If successful, an attacker could use this information to obtain the plaintext password, which could be use to log in the targeted device.
Proof-of-concept code that demonstrates these vulnerabilities is publicly available.
Cisco has confirmed these vulnerabilities in Cisco Bug IDs CSCua00126, CSCub54603, and CSCue42560. Software updates are not available.
Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.