medium5.8
CVE-2011-4354
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 ciphe…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openssl | Openssl | through 0.9.8g Versions 0.9.1c, 0.9.2b, 0.9.3, 0.9.3a, 0.9.4 |
Weakness classification
References
- NVD record
- CVE.org record
- http://crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip
- http://cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21
- http://eprint.iacr.org/2011/633
- http://marc.info/?t=119271238800004
- http://openwall.com/lists/oss-security/2011/12/01/6
- http://rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest
- http://www.debian.org/security/2012/dsa-2390
- https://bugzilla.redhat.com/show_bug.cgi?id=757909
- http://crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip
- http://cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21
- http://eprint.iacr.org/2011/633
- http://marc.info/?t=119271238800004
- http://openwall.com/lists/oss-security/2011/12/01/6
- http://rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest
- http://www.debian.org/security/2012/dsa-2390
- https://bugzilla.redhat.com/show_bug.cgi?id=757909