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CVE-2018-8879

9.8 · CRITICAL

Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by…

Published Nov 21, 2019CWE-787EPSS 17.19%

Overview

CVE-2018-8879 is a critical-severity vulnerability. It was published on November 21, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.

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

Refpagedout.institute/download/PagedOut_001_beta1.pdfRefwww.asus.com/Networking/RTAC66U/HelpDesk_BIOSRefpagedout.institute/download/PagedOut_001_beta1.pdfRefwww.asus.com/Networking/RTAC66U/HelpDesk_BIOS

How CyberStrike helps

Frequently asked questions

What is CVE-2018-8879?

CVE-2018-8879 is a critical-severity vulnerability. It was published on November 21, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2018-8879?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-8879?

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-2018-8879?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-8879 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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