OpenSSL does not use RSA blinding by default, which allows local and remote attackers to obtain the server's private key by determining factors using timing differences on (1) the number of extra reductions during Montgomery reduction, and (2) the use of different integer multiplication algorithms ("Karatsuba" and normal).
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A466
http://www.securityfocus.com/archive/1/316577/30/25310/threaded
http://www.securityfocus.com/archive/1/316165/30/25370/threaded
http://www.redhat.com/support/errata/RHSA-2003-102.html
http://www.redhat.com/support/errata/RHSA-2003-101.html
http://www.openssl.org/news/secadv_20030317.txt
http://www.openpkg.com/security/advisories/OpenPKG-SA-2003.019.html
http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2003:035
http://www.kb.cert.org/vuls/id/997481
http://www.gentoo.org/security/en/glsa/glsa-200303-23.xml
http://www.debian.org/security/2003/dsa-288
http://marc.info/?l=bugtraq&m=104861762028637&w=2
http://marc.info/?l=bugtraq&m=104829040921835&w=2
http://marc.info/?l=bugtraq&m=104819602408063&w=2
http://marc.info/?l=bugtraq&m=104792570615648&w=2
http://marc.info/?l=bugtraq&m=104766550528628&w=2
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000625
http://crypto.stanford.edu/~dabo/papers/ssl-timing.pdf
http://archives.neohapsis.com/archives/vulnwatch/2003-q1/0130.html