The Logjam Vulnerability: Cipher-Downgrade Attacks in TLS 1.2 and Earlier
CVE-2015-4000 · MEDIUM Severity
AV:N/AC:M/AU:N/C:N/I:P/A:N
The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHE_EXPORT and then rewriting a ServerHello with DHE_EXPORT replaced by DHE, aka the "Logjam" issue.
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