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Cisco Network Registrar DHCPv6 Denial of Service Vulnerability

Cisco-SA-20140418-CVE-2014-2155 · Medium · Published · Updated

A vulnerability in the DHCPv6 server module of Cisco Network Registrar could allow an unauthenticated, remote attacker to cause a reload of the DHCPv6 server on an affected device. The vulnerability is due to the way certain malformed requests are processed. An attacker could exploit this vulnerability by sending a malformed DHCPv6 packet to an affected device. A successful exploit could allow the attacker to cause a reload of the DHCPv6 server, which could result in a denial of service condition. Cisco has confirmed the vulnerability in a security notice and released software updates. To exploit this vulnerability, an attacker may need access to trusted, internal networks to send malformed DHCPv6 packets to a targeted device. This access requirement decreases the possibility of a successful exploit. Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.

Cisco advisory ·CSAF JSON

Workarounds

Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

Administrators are advised to monitor affected systems.

CVEsCVE-2014-2155
Cisco Bug IDsCSCuo07437
CVSS ScoreBase 5.0
Base 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:OF/RC:C
Product Names From Source
Cisco CNS Network Registrar

CSAF Product Statuses

Product Status Source CVE Rows
Cisco CNS Network Registrar known_affected cisco_csaf CVE-2014-2155 1

Related Products

Product CVE Evidence
Cisco CNS Network Registrar CVE-2014-2155 Cisco OpenVuln