Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| n/a / n/a | affected n/a |
CWE
No CWE identifiers supplied.
References
- http://crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip
- https://bugzilla.redhat.com/show_bug.cgi?id=757909
- http://openwall.com/lists/oss-security/2011/12/01/6
- http://eprint.iacr.org/2011/633
- http://rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest
- http://cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21
- http://www.debian.org/security/2012/dsa-2390
- http://marc.info/?t=119271238800004
ADP enrichment
No English description supplied.
- http://crypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zip
- https://bugzilla.redhat.com/show_bug.cgi?id=757909
- http://openwall.com/lists/oss-security/2011/12/01/6
- http://eprint.iacr.org/2011/633
- http://rt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guest
- http://cvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21
- http://www.debian.org/security/2012/dsa-2390
- http://marc.info/?t=119271238800004