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CVE-2017-7838

5.3 · MEDIUM

Punycode format text will be displayed for entire qualified international domain names in some instances when a sub-domain triggers the punycode display instead of the primary domain being displaye…

Published Jun 11, 2018CWE-20EPSS 1.47%

Overview

CVE-2017-7838 is a medium-severity vulnerability. It was published on June 11, 2018 and has a CVSS 3.0 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Punycode format text will be displayed for entire qualified international domain names in some instances when a sub-domain triggers the punycode display instead of the primary domain being displayed in native script and the sub-domain only displaying as punycode. This could be used for limited spoofing attacks due to user confusion. This vulnerability affects Firefox < 57.

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/101832Refwww.securitytracker.com/id/1039803Refbugzilla.mozilla.org/show_bug.cgi?id=1399540Refwww.mozilla.org/security/advisories/mfsa2017-24/Refwww.securityfocus.com/bid/101832Refwww.securitytracker.com/id/1039803Refbugzilla.mozilla.org/show_bug.cgi?id=1399540Refwww.mozilla.org/security/advisories/mfsa2017-24/

How CyberStrike helps

Frequently asked questions

What is CVE-2017-7838?

CVE-2017-7838 is a medium-severity vulnerability. It was published on June 11, 2018 and has a CVSS 3.0 base score of 5.3 (MEDIUM).

How severe is CVE-2017-7838?

This vulnerability has a CVSS 3.0 base score of 5.3, 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-2017-7838?

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-2017-7838?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-7838 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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