K15564 : TLS vulnerability CVE-2014-3511

Security Advisory Description

The ssl23_get_client_hello function in s23_srvr.c in OpenSSL 1.0.1 before 1.0.1i allows man-in-the-middle attackers to force the use of TLS 1.0 by triggering ClientHello message fragmentation in communication between a client and server that both support later TLS versions, related to a “protocol downgrade” issue.
(
CVE-2014-3511
)
Impact
Vulnerable hosts may be subject to a man-in-the-middle attack by forcing a downgrade to TLS 1.0, even if both the server and the client support a higher protocol version.