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CVE-2018-0156

7.5 · HIGHActively Exploited

A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in…

Published Mar 28, 2018CWE-399EPSS 9.36%

Overview

CVE-2018-0156 is a high-severity vulnerability. It was published on March 28, 2018 and has a CVSS 3.1 base score of 7.5 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted packet to an affected device on TCP port 4786. Only Smart Install client switches are affected. Cisco devices that are configured as a Smart Install director are not affected by this vulnerability. Cisco Bug IDs: CSCvd40673.

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/103569Refwww.securitytracker.com/id/1040596Refics-cert.us-cert.gov/advisories/ICSA-18-107-04Refics-cert.us-cert.gov/advisories/ICSA-18-107-05Reftools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smiRefwww.securityfocus.com/bid/103569Refwww.securitytracker.com/id/1040596Refics-cert.us-cert.gov/advisories/ICSA-18-107-04Refics-cert.us-cert.gov/advisories/ICSA-18-107-05Reftools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi

How CyberStrike helps

Frequently asked questions

What is CVE-2018-0156?

CVE-2018-0156 is a high-severity vulnerability. It was published on March 28, 2018 and has a CVSS 3.1 base score of 7.5 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2018-0156?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-0156?

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-2018-0156?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-0156 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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