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CVE-2017-7755

7.8 · HIGH

The Firefox installer on Windows can be made to load malicious DLL files stored in the same directory as the installer when it is run.

Published Jun 11, 2018CWE-426EPSS 1.39%

Overview

CVE-2017-7755 is a high-severity vulnerability. It was published on June 11, 2018 and has a CVSS 3.0 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The Firefox installer on Windows can be made to load malicious DLL files stored in the same directory as the installer when it is run. This allows privileged execution if the installer is run with elevated privileges. Note: This attack only affects Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

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/99057Refwww.securitytracker.com/id/1038689Refbugzilla.mozilla.org/show_bug.cgi?id=1361326Refwww.mozilla.org/security/advisories/mfsa2017-15/Refwww.mozilla.org/security/advisories/mfsa2017-16/Refwww.mozilla.org/security/advisories/mfsa2017-17/Refwww.securityfocus.com/bid/99057Refwww.securitytracker.com/id/1038689Refbugzilla.mozilla.org/show_bug.cgi?id=1361326Refwww.mozilla.org/security/advisories/mfsa2017-15/

How CyberStrike helps

Frequently asked questions

What is CVE-2017-7755?

CVE-2017-7755 is a high-severity vulnerability. It was published on June 11, 2018 and has a CVSS 3.0 base score of 7.8 (HIGH).

How severe is CVE-2017-7755?

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-7755?

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-2017-7755?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-7755 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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