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CVE-2018-5108

4.3 · MEDIUM

A Blob URL can violate origin attribute segregation, allowing it to be accessed from a private browsing tab and for data to be passed between the private browsing tab and a normal tab.

Published Jun 11, 2018CWE-200EPSS 1.15%

Overview

CVE-2018-5108 is a medium-severity vulnerability. It was published on June 11, 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 can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A Blob URL can violate origin attribute segregation, allowing it to be accessed from a private browsing tab and for data to be passed between the private browsing tab and a normal tab. This could allow for the leaking of private information specific to the private browsing context. This issue is mitigated by the requirement that the user enter the Blob URL manually in order for the access violation to occur. This vulnerability affects Firefox < 58.

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/102786Refwww.securitytracker.com/id/1040270Refbugzilla.mozilla.org/show_bug.cgi?id=1421099Refusn.ubuntu.com/3544-1/Refwww.mozilla.org/security/advisories/mfsa2018-02/Refwww.securityfocus.com/bid/102786Refwww.securitytracker.com/id/1040270Refbugzilla.mozilla.org/show_bug.cgi?id=1421099Refusn.ubuntu.com/3544-1/Refwww.mozilla.org/security/advisories/mfsa2018-02/

How CyberStrike helps

Frequently asked questions

What is CVE-2018-5108?

CVE-2018-5108 is a medium-severity vulnerability. It was published on June 11, 2018 and has a CVSS 3.0 base score of 4.3 (MEDIUM).

How severe is CVE-2018-5108?

This vulnerability has a CVSS 3.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-5108?

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-2018-5108?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-5108 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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