CVE-2018-0170

Name: CVE-2018-0170
Creator: NVD / NIST
Published: 2018-03-28T22:29:01.017+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.74%

Last modified Jun 17, 2026

CVE-2018-0170 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the Cisco Umbrella Integration feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition, related to the OpenDNS software. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an internal data structure after it has been freed. EPSS estimates a 2.74% chance of exploitation in the next 30 days.

Description

A vulnerability in the Cisco Umbrella Integration feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition, related to the OpenDNS software. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an internal data structure after it has been freed. An attacker could exploit this vulnerability by sending crafted, malformed IP packets to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvb86327.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.74%

84.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios Xe	16.4.1

References

http://www.securityfocus.com/bid/103560Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040590Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-opendns-dosVendor Advisory
http://www.securityfocus.com/bid/103560Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040590Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-opendns-dosVendor Advisory

Timeline

Published: Mar 28, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0170?

How severe is CVE-2018-0170?

CVE-2018-0170 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.74% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0170?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0170?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST