cve-2019-1543
Vulnerability from cvelistv5
Published
2019-03-06 21:00
Modified
2024-09-16 17:43
Severity
Summary
ChaCha20-Poly1305 with long nonces
References
SourceURLTags
openssl-security@openssl.orghttp://lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html
openssl-security@openssl.orghttps://access.redhat.com/errata/RHSA-2019:3700
openssl-security@openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ee22257b1418438ebaf54df98af4e24f494d1809
openssl-security@openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f426625b6ae9a7831010750490a5f0ad689c5ba3
openssl-security@openssl.orghttps://kc.mcafee.com/corporate/index?page=content&id=SB10365
openssl-security@openssl.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/
openssl-security@openssl.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/
openssl-security@openssl.orghttps://seclists.org/bugtraq/2019/Jul/3
openssl-security@openssl.orghttps://www.debian.org/security/2019/dsa-4475
openssl-security@openssl.orghttps://www.openssl.org/news/secadv/20190306.txtVendor Advisory
openssl-security@openssl.orghttps://www.oracle.com/security-alerts/cpuapr2020.html
openssl-security@openssl.orghttps://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
openssl-security@openssl.orghttps://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Impacted products
VendorProduct
OpenSSLOpenSSL
Show details on NVD website

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If an application changes the default nonce length to be longer than 12 bytes and then makes a change to the leading bytes of the nonce expecting the new value to be a new unique nonce then such an application could inadvertently encrypt messages with a reused nonce. Additionally the ignored bytes in a long nonce are not covered by the integrity guarantee of this cipher. Any application that relies on the integrity of these ignored leading bytes of a long nonce may be further affected. Any OpenSSL internal use of this cipher, including in SSL/TLS, is safe because no such use sets such a long nonce value. However user applications that use this cipher directly and set a non-default nonce length to be longer than 12 bytes may be vulnerable. OpenSSL versions 1.1.1 and 1.1.0 are affected by this issue. Due to the limited scope of affected deployments this has been assessed as low severity and therefore we are not creating new releases at this time. Fixed in OpenSSL 1.1.1c (Affected 1.1.1-1.1.1b). Fixed in OpenSSL 1.1.0k (Affected 1.1.0-1.1.0j).\"},{\"lang\":\"es\",\"value\":\"ChaCha20-Poly1305 es un cifrado AEAD y requiere una entrada \u00fanica para cada operaci\u00f3n de cifrado. RFC 7539 especifica que el valor de nonce (IV) debe ser de 96 bits (12 bytes). OpenSSL permite una longitud de nonce variable y las almohadillas frontales del nonce con 0 bytes si es inferior a 12 bytes. Sin embargo, tambi\u00e9n permite incorrectamente que se establezca un nonce de hasta 16 bytes. En este caso, solo los \u00faltimos 12 bytes son significativos y los bytes iniciales adicionales se ignoran. Es un requisito de usar este cifrado que los valores de nonce son \u00fanicos. Los mensajes cifrados que utilizan un valor nonce reutilizado son susceptibles de graves ataques de confidencialidad e integridad. Si una aplicaci\u00f3n cambia la longitud del nonce por defecto a m\u00e1s de 12 bytes y luego realiza un cambio a los bytes iniciales del nonce, esperando que el nuevo valor sea un nuevo nonce \u00fanico, dicha aplicaci\u00f3n podr\u00eda encriptar inadvertidamente los mensajes con un nonce reutilizado. Adem\u00e1s, los bytes ignorados en un nonce largo no est\u00e1n cubiertos por la garant\u00eda de integridad de este cifrado. Cualquier aplicaci\u00f3n que se base en la integridad de estos bytes iniciales ignorados de un nonce largo puede verse afectada a\u00fan m\u00e1s. Cualquier uso interno de OpenSSL de este cifrado, incluido en SSL / TLS, es seguro porque dicho uso no establece un valor de referencia tan largo. Sin embargo, las aplicaciones de usuario que usan este cifrado directamente y establecen una longitud de nonce no predeterminada para que sea mayor a 12 bytes pueden ser vulnerables. Las versiones de OpenSSL 1.1.1 y 1.1.0 est\u00e1n afectadas por este problema. Debido al alcance limitado de las implementaciones afectadas, esto se ha evaluado como de baja gravedad y, por lo tanto, no estamos creando nuevas versiones en este momento. Corregido en OpenSSL 1.1.1c (Afectado 1.1.1-1.1.1b). Corregido en OpenSSL 1.1.0k (Afectado 1.1.0-1.1.0j).\"}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\",\"baseScore\":7.4,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":5.2}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:P/I:P/A:N\",\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\",\"baseScore\":5.8},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":4.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-327\"},{\"lang\":\"en\",\"value\":\"CWE-330\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.1.0\",\"versionEndIncluding\":\"1.1.0j\",\"matchCriteriaId\":\"0466F5F7-8C7F-4A92-B114-8747FAF50EC1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.1.1\",\"versionEndIncluding\":\"1.1.1b\",\"matchCriteriaId\":\"14FB3791-EE20-45C7-BD1B-69395131B8A9\"}]}]}],\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2019:3700\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ee22257b1418438ebaf54df98af4e24f494d1809\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f426625b6ae9a7831010750490a5f0ad689c5ba3\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10365\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://seclists.org/bugtraq/2019/Jul/3\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://www.debian.org/security/2019/dsa-4475\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://www.openssl.org/news/secadv/20190306.txt\",\"source\":\"openssl-security@openssl.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpuapr2020.html\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html\",\"source\":\"openssl-security@openssl.org\"},{\"url\":\"https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html\",\"source\":\"openssl-security@openssl.org\"}]}}"
  }
}


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