Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2011-1945

Severity CVSS v4.0:
Pending analysis
Type:
CWE-310 Cryptographic Issues
Publication date:
31/05/2011
Last modified:
06/06/2013

Description

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.

Impact

Vector 2.0
AV:N/AC:H/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 2.60 LOW
Vector: AV:N/AC:H/Au:N/C:P/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0
2.60
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* 1.0.0d (including)
cpe:2.3:a:openssl:openssl:0.9.1c:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.2b:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.3:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.3a:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.4:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.5:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.5:beta1:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.5:beta2:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.5a:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.5a:beta1:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.5a:beta2:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.6:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.6:beta1:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.6:beta2:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools