RSA verification recovery in the EVP_PKEY_verify_recover function in OpenSSL 1.x before 1.0.0a, as used by pkeyutl and possibly other applications, returns uninitialized memory upon failure, which might allow context-dependent attackers to bypass intended key requirements or obtain sensitive information via unspecified vectors. NOTE: some of these details are obtained from third party information.
https://bugzilla.redhat.com/show_bug.cgi?id=598732
http://www.vupen.com/english/advisories/2010/1313
http://www.securityfocus.com/bid/40503
http://www.openssl.org/news/secadv_20100601.txt
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004564
http://secunia.com/advisories/57353
http://secunia.com/advisories/40024
http://cvs.openssl.org/filediff?f=openssl/crypto/rsa/rsa_pmeth.c&v1=1.34&v2=1.34.2.1