CVE-2017-7767

low-risk
Published 2018-06-11

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.

Do I need to act?

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0.14% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Mozilla

References (10)

Third Party Advisory http://www.securityfocus.com/bid/99057
Third Party Advisory http://www.securitytracker.com/id/1038689
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1336964
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-15/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-16/
Third Party Advisory http://www.securityfocus.com/bid/99057
Third Party Advisory http://www.securitytracker.com/id/1038689
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1336964
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-15/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-16/
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal