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Last updated: 2/8/2016 9:26:36 AM

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National Cyber Awareness System

Vulnerability Summary for CVE-2011-4354

Original release date: 01/26/2012
Last revised: 11/06/2012


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.8 (MEDIUM) (AV:N/AC:M/Au:N/C:P/I:P/A:N) (legend)
Impact Subscore: 4.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification

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External Source: MLIST
Name: [oss-security] 20111201 CVE-2011-4354 OpenSSL 0.9.8g (32-bit builds) bug leaks ECC private keys
External Source: CONFIRM
Name: http://marc.info/?t=119271238800004
External Source: DEBIAN
Name: DSA-2390
External Source: MISC
Name: http://crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip
External Source: MISC
Name: http://eprint.iacr.org/2011/633
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=757909
External Source: CONFIRM
Name: http://rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest
External Source: CONFIRM
Name: http://cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/a:openssl:openssl:0.9.8::~~~~x86~
* cpe:/a:openssl:openssl:0.9.8a::~~~~x86~
* cpe:/a:openssl:openssl:0.9.8b::~~~~x86~
* cpe:/a:openssl:openssl:0.9.8c::~~~~x86~
* cpe:/a:openssl:openssl:0.9.8d::~~~~x86~
* cpe:/a:openssl:openssl:0.9.8e::~~~~x86~
* cpe:/a:openssl:openssl:0.9.8f::~~~~x86~
* cpe:/a:openssl:openssl:0.9.1c::~~~~x86~
* cpe:/a:openssl:openssl:0.9.2b::~~~~x86~
* cpe:/a:openssl:openssl:0.9.3::~~~~x86~
* cpe:/a:openssl:openssl:0.9.3a::~~~~x86~
* cpe:/a:openssl:openssl:0.9.4::~~~~x86~
* cpe:/a:openssl:openssl:0.9.5::~~~~x86~
* cpe:/a:openssl:openssl:0.9.5:beta1:~~~~x86~
* cpe:/a:openssl:openssl:0.9.5:beta2:~~~~x86~
* cpe:/a:openssl:openssl:0.9.5a::~~~~x86~
* cpe:/a:openssl:openssl:0.9.5a:beta1:~~~~x86~
* cpe:/a:openssl:openssl:0.9.5a:beta2:~~~~x86~
* cpe:/a:openssl:openssl:0.9.6a::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6a:beta1:~~~~x86~
* cpe:/a:openssl:openssl:0.9.6a:beta2:~~~~x86~
* cpe:/a:openssl:openssl:0.9.6a:beta3:~~~~x86~
* cpe:/a:openssl:openssl:0.9.6::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6:beta1:~~~~x86~
* cpe:/a:openssl:openssl:0.9.6:beta2:~~~~x86~
* cpe:/a:openssl:openssl:0.9.6:beta3:~~~~x86~
* cpe:/a:openssl:openssl:0.9.6g::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6f::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6i::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6h::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6c::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6b::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6e::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6d::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6k::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6j::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6m::~~~~x86~
* cpe:/a:openssl:openssl:0.9.6l::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7:beta1:~~~~x86~
* cpe:/a:openssl:openssl:0.9.7::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7:beta3:~~~~x86~
* cpe:/a:openssl:openssl:0.9.7:beta2:~~~~x86~
* cpe:/a:openssl:openssl:0.9.7m::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7:beta6:~~~~x86~
* cpe:/a:openssl:openssl:0.9.7a::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7:beta4:~~~~x86~
* cpe:/a:openssl:openssl:0.9.7:beta5:~~~~x86~
* cpe:/a:openssl:openssl:0.9.7d::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7e::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7b::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7c::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7h::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7i::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7f::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7g::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7j::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7k::~~~~x86~
* cpe:/a:openssl:openssl:0.9.7l::~~~~x86~
* cpe:/a:openssl:openssl:0.9.8g::~~~~x86~ and previous versions

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)