CVE-2017-3859

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.34%
Vendor Advisory cisco.com
Affected: n/a Cisco IOS XE Software for Cisco ASR 920 Series Routers
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1038104 vdb entry
http://www.securityfocus.com/bid/97008 vdb entry third party advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-ztp vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-3859?
CVE-2017-3859 has been scored as a high severity vulnerability.
How to fix CVE-2017-3859?
To fix CVE-2017-3859, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-3859 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-3859 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-3859?
CVE-2017-3859 affects n/a Cisco IOS XE Software for Cisco ASR 920 Series Routers.
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