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

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CVE-2011-4354

Severity CVSS v4.0:
Pending analysis
Type:
CWE-310 Cryptographic Issues
Publication date:
27/01/2012
Last modified:
11/04/2025

Description

crypto/bn/bn_nist.c in OpenSSL before 0.9.8h on 32-bit platforms, as used in stunnel and other products, in certain circumstances involving ECDH or ECDHE cipher suites, uses an incorrect modular reduction algorithm in its implementation of the P-256 and P-384 NIST elliptic curves, which allows remote attackers to obtain the private key of a TLS server via multiple handshake attempts.

Impact

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

Base Score: 5.80 MEDIUM
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N

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

Base Score 2.0
5.80
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:x86:* 0.9.8g (including)
cpe:2.3:a:openssl:openssl:0.9.1c:*:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.2b:*:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.3:*:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.3a:*:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.4:*:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.5:*:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.5:beta1:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.5:beta2:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.5a:*:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.5a:beta1:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.5a:beta2:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.6:*:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.6:beta1:*:*:*:*:x86:*
cpe:2.3:a:openssl:openssl:0.9.6:beta2:*:*:*:*:x86:*

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


References to Advisories, Solutions, and Tools