CVE-2011-4354

openssl: ECC private leak (disclosure of TLS server's private key)

Published Jan 27, 2012 CVSS 2.0 · 5.8 Medium EPSS 3.0% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-2390-1 openssl security update
EUVD EUVD EUVD-2011-4285 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.
Ubuntu USN Ubuntu USN USN-1357-1 OpenSSL vulnerabilities
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 7, 2024, 12:01 AM
Reserved
Nov 4, 2011, 12:00 AM
Status
Modified
Published
Jan 27, 2012, 12:55 AM
Modified
Jun 16, 2026, 11:34 PM
Severity
Moderate
Public date
Nov 24, 2011, 12:00 AM