OpenSSL Exposure of Sensitive Information to an Unauthorized Actor Vulnerability - CVE-2016-0701
The DH_check_pub_key function in crypto/dh/dh_check.c in OpenSSL 1.0.2 before 1.0.2f does not ensure that prime numbers are appropriate for Diffie-Hellman (DH) key exchange which makes it easier for remote attackers to discover a private DH exponent by making multiple handshakes with a peer that chose an inappropriate number as demonstrated by a number in an X9.42 file.