Montgomery multiplication for elleptic cryptography is not applied in BN_from_montgomery() functions, making it possible to retrieve RSA private key of different user.
CVE-2007-3108 (The BN_from_montgomery function in crypto/bn/bn_mont.c in OpenSSL 0.9.8e and earlier does not properly perform Montgomery multiplication, which might allow local users to conduct a side-channel attack and retrieve RSA private keys.)