CVE-2019-9809

HIGH

Firefox < 66.0 - Denial of Service via FTP Resource Modal Alerts

Title source: llm
STIX 2.1

Description

If the source for resources on a page is through an FTP connection, it is possible to trigger a series of modal alert messages for these resources through invalid credentials or locations. These messages cannot be immediately dismissed, allowing for a denial of service (DOS) attack. This vulnerability affects Firefox < 66.

References (3)

Core 3
Core References
Exploit, Issue Tracking, Patch, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1282430
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1523249

Scores

CVSS v3 7.5
EPSS 0.0048
EPSS Percentile 65.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-399
Status published
Products (1)
mozilla/firefox < 66.0
Published Apr 26, 2019
Tracked Since Feb 18, 2026