CVE-2015-3193
HighSummary
The Montgomery squaring implementation in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform mishandles carry propagation, leading to incorrect output. This makes it easier for remote attackers to obtain sensitive private-key information via an attack against the use of (1) Diffie-Hellman (DH) or (2) Diffie-Hellman Ephemeral (DHE) ciphersuite.
Risk Assessment
Organizations may be at risk of private key theft, potentially leading to the compromise of sensitive data and security breaches in communication.
Recommendation
It is recommended to upgrade OpenSSL to version 1.0.2e or later to mitigate this vulnerability and to conduct a security audit of the ciphersuites in use.
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Original NVD description (English source)
The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform, as used by the BN_mod_exp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key information via an attack against use of a (1) Diffie-Hellman (DH) or (2) Diffie-Hellman Ephemeral (DHE) ciphersuite.