If a server sends two Strict-Transport-Security (STS) headers for a single connection, they will be rejected as invalid and HTTP Strict Transport Security (HSTS) will not be enabled for the connection. This vulnerability affects Firefox < 55.
http://www.securitytracker.com/id/1039124
http://www.securityfocus.com/bid/100374
https://www.mozilla.org/security/advisories/mfsa2017-18/
https://bugzilla.mozilla.org/show_bug.cgi?id=1074642
Source: Mitre, NVD
Published: 2018-06-11
Updated: 2024-11-21
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS: 0.01131