medium
5.8
CWE
310
Advisory Published
CVE Published
Updated

CVE-2011-4354

First published: Mon Nov 28 2011(Updated: )

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.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
OpenSSL libcrypto<=0.9.8g
OpenSSL libcrypto=0.9.1c
OpenSSL libcrypto=0.9.2b
OpenSSL libcrypto=0.9.3
OpenSSL libcrypto=0.9.3a
OpenSSL libcrypto=0.9.4
OpenSSL libcrypto=0.9.5
OpenSSL libcrypto=0.9.5-beta1
OpenSSL libcrypto=0.9.5-beta2
OpenSSL libcrypto=0.9.5a
OpenSSL libcrypto=0.9.5a-beta1
OpenSSL libcrypto=0.9.5a-beta2
OpenSSL libcrypto=0.9.6
OpenSSL libcrypto=0.9.6-beta1
OpenSSL libcrypto=0.9.6-beta2
OpenSSL libcrypto=0.9.6-beta3
OpenSSL libcrypto=0.9.6a
OpenSSL libcrypto=0.9.6a-beta1
OpenSSL libcrypto=0.9.6a-beta2
OpenSSL libcrypto=0.9.6a-beta3
OpenSSL libcrypto=0.9.6b
OpenSSL libcrypto=0.9.6c
OpenSSL libcrypto=0.9.6d
OpenSSL libcrypto=0.9.6e
OpenSSL libcrypto=0.9.6f
OpenSSL libcrypto=0.9.6g
OpenSSL libcrypto=0.9.6h
OpenSSL libcrypto=0.9.6i
OpenSSL libcrypto=0.9.6j
OpenSSL libcrypto=0.9.6k
OpenSSL libcrypto=0.9.6l
OpenSSL libcrypto=0.9.6m
OpenSSL libcrypto=0.9.7
OpenSSL libcrypto=0.9.7-beta1
OpenSSL libcrypto=0.9.7-beta2
OpenSSL libcrypto=0.9.7-beta3
OpenSSL libcrypto=0.9.7-beta4
OpenSSL libcrypto=0.9.7-beta5
OpenSSL libcrypto=0.9.7-beta6
OpenSSL libcrypto=0.9.7a
OpenSSL libcrypto=0.9.7b
OpenSSL libcrypto=0.9.7c
OpenSSL libcrypto=0.9.7d
OpenSSL libcrypto=0.9.7e
OpenSSL libcrypto=0.9.7f
OpenSSL libcrypto=0.9.7g
OpenSSL libcrypto=0.9.7h
OpenSSL libcrypto=0.9.7i
OpenSSL libcrypto=0.9.7j
OpenSSL libcrypto=0.9.7k
OpenSSL libcrypto=0.9.7l
OpenSSL libcrypto=0.9.7m
OpenSSL libcrypto=0.9.8
OpenSSL libcrypto=0.9.8a
OpenSSL libcrypto=0.9.8b
OpenSSL libcrypto=0.9.8c
OpenSSL libcrypto=0.9.8d
OpenSSL libcrypto=0.9.8e
OpenSSL libcrypto=0.9.8f

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-4354?

    CVE-2011-4354 has been classified as a moderate severity vulnerability due to its potential impact on secure communications.

  • How do I fix CVE-2011-4354?

    To fix CVE-2011-4354, upgrade OpenSSL to version 0.9.8h or later on affected systems.

  • What impact does CVE-2011-4354 have on affected systems?

    CVE-2011-4354 might allow an attacker to exploit weaknesses in the ECDH and ECDHE cipher suites leading to compromised cryptographic keys.

  • Which OpenSSL versions are affected by CVE-2011-4354?

    CVE-2011-4354 affects OpenSSL versions before 0.9.8h on 32-bit platforms.

  • In what products is CVE-2011-4354 known to be a vulnerability?

    CVE-2011-4354 is known to affect products that utilize vulnerable versions of OpenSSL, including stunnel.

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