CVE-2015-3193

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    CVE-2015-3193

    Published: 6 Dec 2015Last Modified: 10 Apr 2026

    Summary:

    Details: 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.

    References: http://fortiguard.com/advisory/openssl-advisory-december-2015, http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759, http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761, http://openssl.org/news/secadv/20151203.txt, http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-openssl, http://www.fortiguard.com/advisory/openssl-advisory-december-2015, http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html, http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html, http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html, http://www.securityfocus.com/bid/78705, http://www.securityfocus.com/bid/91787, http://www.securitytracker.com/id/1034294, http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.539966, http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583, http://www.ubuntu.com/usn/USN-2830-1, https://blog.fuzzing-project.org/31-Fuzzing-Math-miscalculations-in-OpenSSLs-BN_mod_exp-CVE-2015-3193.html, https://bugzilla.redhat.com/show_bug.cgi?id=1288317, https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05398322, https://kb.isc.org/article/AA-01438, https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40100, http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html, http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html, http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html, https://bugzilla.redhat.com/show_bug.cgi?id=1288317, https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf, https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=d73cc256c8e256c32ed959456101b73ba9842f72

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2015-3193 | CVE-DB