|Date: (C)2011-05-31 (M)2017-05-05|
|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 elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly implement curves over binary fields, which makes it easier for context-dependent attackers to determine private keys via a timing attack and a lattice calculation.