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CVE-2018-5163

8.1 · HIGH

If a malicious attacker has used another vulnerability to gain full control over a content process, they may be able to replace the alternate data resources stored in the JavaScript Start-up Byteco…

Published Jun 11, 2018CWE-281EPSS 2.09%

Overview

CVE-2018-5163 is a high-severity vulnerability. It was published on June 11, 2018 and has a CVSS 3.0 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

If a malicious attacker has used another vulnerability to gain full control over a content process, they may be able to replace the alternate data resources stored in the JavaScript Start-up Bytecode Cache (JSBC) for other JavaScript code. If the parent process then runs this replaced code, the executed script would be run with the parent process' privileges, escaping the sandbox on content processes. This vulnerability affects Firefox < 60.

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/104139Refwww.securitytracker.com/id/1040896Refbugzilla.mozilla.org/show_bug.cgi?id=1426353Refusn.ubuntu.com/3645-1/Refwww.mozilla.org/security/advisories/mfsa2018-11/Refwww.securityfocus.com/bid/104139Refwww.securitytracker.com/id/1040896Refbugzilla.mozilla.org/show_bug.cgi?id=1426353Refusn.ubuntu.com/3645-1/Refwww.mozilla.org/security/advisories/mfsa2018-11/

How CyberStrike helps

Frequently asked questions

What is CVE-2018-5163?

CVE-2018-5163 is a high-severity vulnerability. It was published on June 11, 2018 and has a CVSS 3.0 base score of 8.1 (HIGH).

How severe is CVE-2018-5163?

This vulnerability has a CVSS 3.0 base score of 8.1, 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-2018-5163?

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-2018-5163?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-5163 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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