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OpenSSL BN_mod_exp may produce incorrect results on x86_64 (CVE-2015-3193)

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OpenSSL BN_mod_exp may produce incorrect results on x86_64 (CVE-2015-3193)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
12/06/2015
Created
07/25/2018
Added
12/08/2015
Modified
12/01/2017

Description

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.

Solution(s)

  • http-openssl-1_0_2-upgrade-1_0_2_e

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