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Cisco IOS Software DHCPv6 Server Implementation Denial of Service Vulnerability

Cisco-SA-20150918-CVE-2015-6297 · Medium · Published · Updated

A vulnerability in the DHCP version 6 (DHCPv6) server implementation of Cisco IOS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper handling of crafted DHCPv6 packets. An attacker could exploit this vulnerability by sending crafted DHCPv6 packets to be processed by the affected device. An exploit could allow the attacker to cause a reset of an affected process. Cisco has confirmed the vulnerability and released software updates. To exploit this vulnerability a remote attacker does not need to authenticate to pass the crafted DHCPv6 packets to the targeted device. This increases the likelihood of a possible 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 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.

CVEsCVE-2015-6297
Cisco Bug IDsNA
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 ASR 9000 Series Aggregation Services Routers

CSAF Product Statuses

Product Status Source CVE Rows
Cisco ASR 9000 Series Aggregation Services Routers known_affected cisco_csaf CVE-2015-6297 1

Related Products

Product CVE Evidence
Cisco ASR 9000 Series Aggregation Services Routers CVE-2015-6297 Cisco OpenVuln · family-level
Cisco IOS CVE-2015-6297 Cisco OpenVuln
Cisco IOS Software CVE-2015-6297 Cisco OpenVuln