CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
56.0%
A vulnerability in the DHCP process of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to improper processing of crafted DHCP messages on a targeted interface of an affected device. An unauthenticated, remote attacker could exploit this vulnerability by sending large amounts of crafted DHCP messages to a targeted interface on an affected device. A successful exploit could cause the device to stop responding to DHCP requests on that interface, resulting in a DoS condition.
Cisco has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker may need access to trusted, internal networks behind a firewall to send large amounts of crafted DHCP messages to an interface on the device. This access requirement may reduce the likelihood 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.
Vendor | Product | Version | CPE |
---|---|---|---|
cisco | asr_9000_rsp440_router | any | cpe:2.3:h:cisco:asr_9000_rsp440_router:any:*:*:*:*:*:*:* |
cisco | asr_9904 | 9000_series_aggregation_services_routers | cpe:2.3:h:cisco:asr_9904:9000_series_aggregation_services_routers:*:*:*:*:*:*:* |