CVE-2017-7767

Name: CVE-2017-7767
Creator: NVD / NIST
Published: 2018-06-11T21:29:08.577+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.28%

Last modified Jun 17, 2026

CVE-2017-7767 is a vulnerability of currently unknown severity. The Mozilla Maintenance Service can be invoked by an unprivileged user to overwrite arbitrary files with junk data using the Mozilla Windows Updater, which runs with the Maintenance Service's privileged access. Note: This attack requires local system access and only affects Windows. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

The Mozilla Maintenance Service can be invoked by an unprivileged user to overwrite arbitrary files with junk data using the Mozilla Windows Updater, which runs with the Maintenance Service's privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.

Metrics

EPSS Probability

0.28%

19.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 52.2.0
Mozilla	Firefox	< 54.0

References

http://www.securityfocus.com/bid/99057Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038689Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1336964Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-15/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-16/Vendor Advisory
http://www.securityfocus.com/bid/99057Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038689Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1336964Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-15/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-16/Vendor Advisory

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7767?

How severe is CVE-2017-7767?

Severity scoring for CVE-2017-7767 is pending analysis. The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7767?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-7767?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST