CVE Catalog

CVE-2017-3859

High
Published: Translated: NVD NIST

Summary

A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload. This is due to a format string vulnerability when processing a crafted DHCP packet.

Risk Assessment

Exploitation of this vulnerability could lead to a denial of service (DoS) condition, disrupting the organization's network operations.

Recommendation

It is recommended to update Cisco IOS XE software to a non-vulnerable version and to monitor DHCP traffic for potential attacks.

Related vulnerabilities

Original NVD description (English source)

A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a format string vulnerability when processing a crafted DHCP packet for Zero Touch Provisioning. An attacker could exploit this vulnerability by sending a specially crafted DHCP packet to an affected device. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects Cisco ASR 920 Series Aggregation Services Routers that are running an affected release of Cisco IOS XE Software (3.13 through 3.18) and are listening on the DHCP server port. By default, the devices do not listen on the DHCP server port. Cisco Bug IDs: CSCuy56385.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS