CVE-2011-4354

原文の説明

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.

影響を受けるソフトウェア

• OpenSSL = 0.9.8a= 0.9.8d= 0.9.7b= 0.9.7f= 0.9.7j= 0.9.4 完全一致

詳細

公開日

2012-01-27

最終更新

2026-06-16

CVSS ベクター

AV:N/AC:M/Au:N/C:P/I:P/A:N

CWE

CWE-310

参考資料

• cve.org/CVE-2011-4354
• nvd.nist.gov/vuln/detail/CVE-2011-4354
• crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip
• cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21
• eprint.iacr.org/2011/633
• marc.info/?t=119271238800004
• openwall.com/lists/oss-security/2011/12/01/6
• rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest
• www.debian.org/security/2012/dsa-2390
• bugzilla.redhat.com/show_bug.cgi?id=757909