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CVE-2018-20487

8.8 · HIGH

An issue was discovered in the firewall3 component in Inteno IOPSYS 1.0 through 3.16.

Published Apr 11, 2019CWE-20EPSS 1.87%

Overview

CVE-2018-20487 is a high-severity vulnerability. It was published on April 11, 2019 and has a CVSS 3.0 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

An issue was discovered in the firewall3 component in Inteno IOPSYS 1.0 through 3.16. The attacker must make a JSON-RPC method call to add a firewall rule as an "include" and point the "path" argument to a malicious script or binary. This gets executed as root when the firewall changes are committed.

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

Refpublic.inteno.se/?p=feed-inteno-openwrt.git%3Ba=commit%3Bh=e6159ca928d7f0c143be213afc6bf810c0329fe2Refneonsea.uk/blog/2018/12/26/firewall-includes.htmlRefpublic.inteno.se/?p=feed-inteno-openwrt.git%3Ba=commit%3Bh=e6159ca928d7f0c143be213afc6bf810c0329fe2Refneonsea.uk/blog/2018/12/26/firewall-includes.html

How CyberStrike helps

Frequently asked questions

What is CVE-2018-20487?

CVE-2018-20487 is a high-severity vulnerability. It was published on April 11, 2019 and has a CVSS 3.0 base score of 8.8 (HIGH).

How severe is CVE-2018-20487?

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2018-20487?

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-2018-20487?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-20487 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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