A security issue has been found in Firefox < 55.0. 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.
A security issue has been found in Firefox < 55.0. 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.
https://www.mozilla.org/en-US/security/advisories/mfsa2017-18/#CVE-2017-7789 https://bugzilla.mozilla.org/show_bug.cgi?id=1074642
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