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.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Firefox | Mozilla | * | 55.0 (excluding) |
Firefox | Ubuntu | devel | * |
Firefox | Ubuntu | trusty | * |
Firefox | Ubuntu | upstream | * |
Firefox | Ubuntu | xenial | * |
Firefox | Ubuntu | yakkety | * |
Firefox | Ubuntu | zesty | * |