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Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected."}, {"lang": "es", "value": "Existe un error de propagaci\u00f3n de acarreo en el procedimiento de multiplicaci\u00f3n Montgomery Broadwell-specific en OpenSSL 1.0.2 y 1.1.0 en versiones anteriores a la 1.1.0c, que maneja longitudes de entrada divisibles por, pero m\u00e1s largas que 256 bits. El an\u00e1lisis sugiere que los ataques contra las claves privadas RSA, DSA y DH son imposibles. Esto se debe a que dicha subrutina no se utiliza en operaciones con la clave privada y una entrada elegida directamente por el atacante. En caso contrario, el error puede manifestarse como una autenticaci\u00f3n transitoria o con errores en la negociaci\u00f3n de claves o en un resultado err\u00f3neo reproducible en operaciones de clave p\u00fablica a trav\u00e9s de una entrada especialmente dise\u00f1ada. Entre los algoritmos de Curva Eliptica solo los Brainpool P-512 est\u00e1n afectados y presumiblemente puede atacarse la negociaci\u00f3n de claves ECDH. El impacto no se analiz\u00f3 en detalle, ya que los requisitos previos para el ataque se consideran improbables. Notese que varios clientes tienen que elegir la curva en cuesti\u00f3n y el servidor tiene que compartir la clave privada entre ellos, lo que no es un comportamiento por defecto en ning\u00fan caso. Incluso en esa situaci\u00f3n, s\u00f3lo los clientes que eligieron la curva se ver\u00e1n afectados."}], "id": "CVE-2016-7055", "lastModified": "2026-06-17T00:52:14.023", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.6, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:H/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 4.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": 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[{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the OpenSSL project for reporting this issue.", "affected_release": [{"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-apache-commons-daemon-0:1.1.0-1.redhat_2.1.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-apr-0:1.6.3-14.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-apr-util-0:1.6.1-9.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-httpd-0:2.4.29-17.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-mod_auth_kerb-0:5.4-36.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-mod_bmx-0:0.9.6-17.GA.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_2.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-mod_jk-0:1.2.43-1.redhat_1.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-mod_rt-0:2.4.1-19.GA.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-mod_security-0:2.9.1-23.GA.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-nghttp2-0:1.29.0-8.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2186", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apache-commons-daemon-0:1.1.0-1.redhat_2.1.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apr-0:1.6.3-14.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apr-util-0:1.6.1-9.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-httpd-0:2.4.29-17.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_auth_kerb-0:5.4-36.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_bmx-0:0.9.6-17.GA.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_2.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_jk-0:1.2.43-1.redhat_1.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_rt-0:2.4.1-19.GA.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-mod_security-0:2.9.1-23.GA.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-nghttp2-0:1.29.0-8.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2185", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2018-07-12T00:00:00Z"}, {"advisory": "RHSA-2018:2187", "cpe": "cpe:/a:redhat:jboss_core_services:1", "product_name": "Text-Only JBCS", "release_date": "2018-07-12T00:00:00Z"}], "bugzilla": {"description": "openssl: Carry propagating bug in Montgomery multiplication", "id": "1393929", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1393929"}, "csaw": false, "cvss": {"cvss_base_score": "2.6", "cvss_scoring_vector": "AV:N/AC:H/Au:N/C:N/I:N/A:P", "status": "verified"}, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "verified"}, "cwe": "CWE-682", "details": ["There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure in OpenSSL 1.0.2 and 1.1.0 before 1.1.0c that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected."], "name": "CVE-2016-7055", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "openssl097a", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "openssl098e", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "openssl098e", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "OVMF", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Will not fix", "package_name": "openssl", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:6", "fix_state": "Will not fix", "package_name": "openssl", "product_name": "Red Hat JBoss Enterprise Application Platform 6"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:1", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat JBoss Enterprise Web Server 1"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:2", "fix_state": "Will not fix", "package_name": "openssl", "product_name": "Red Hat JBoss Enterprise Web Server 2"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:3", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat JBoss Enterprise Web Server 3"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:3", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat JBoss Web Server 3"}], "public_date": "2016-10-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-7055\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-7055\nhttps://www.openssl.org/news/secadv/20161110.txt\nhttps://www.openssl.org/news/secadv/20170126.txt"], "threat_severity": "Low"}

{}