|Date: (C)2016-02-29 (M)2017-11-15|
|CVSS Score: 2.6||Access Vector: NETWORK|
|Exploitability Subscore: 4.9||Access Complexity: HIGH|
|Impact Subscore: 2.9||Authentication: NONE|
| ||Confidentiality: PARTIAL|
| ||Integrity: NONE|
| ||Availability: NONE|
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.