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CVE-2018-0257

4.3 · MEDIUM

A vulnerability in Cisco IOS XE Software running on Cisco cBR Series Converged Broadband Routers could allow an unauthenticated, adjacent attacker to cause high CPU usage on an affected device, res…

Published Apr 19, 2018CWE-399EPSS 0.77%

Overview

CVE-2018-0257 is a medium-severity vulnerability. It was published on April 19, 2018 and has a CVSS 3.0 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 4.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

A vulnerability in Cisco IOS XE Software running on Cisco cBR Series Converged Broadband Routers could allow an unauthenticated, adjacent attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the incorrect handling of certain DHCP packets. An attacker could exploit this vulnerability by sending certain DHCP packets to a specific segment of an affected device. A successful exploit could allow the attacker to increase CPU usage on the affected device and cause a DoS condition. Cisco Bug IDs: CSCvg73687.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/103948Refwww.securitytracker.com/id/1040716Reftools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8Refwww.securityfocus.com/bid/103948Refwww.securitytracker.com/id/1040716Reftools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8

How CyberStrike helps

Frequently asked questions

What is CVE-2018-0257?

CVE-2018-0257 is a medium-severity vulnerability. It was published on April 19, 2018 and has a CVSS 3.0 base score of 4.3 (MEDIUM).

How severe is CVE-2018-0257?

This vulnerability has a CVSS 3.0 base score of 4.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-0257?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-0257?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-0257 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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