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A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server."}, {"lang": "es", "value": "Se ha descubierto un error de desbordamiento de enteros que podr\u00eda conducir a una escritura fuera de l\u00edmites en libssh2, en versiones anteriores a la 1.8.1, en la forma en la que se analizan las peticiones de comandos de teclado. Un atacante remoto que comprometa un servidor SSH podr\u00eda ser capaz de ejecutar c\u00f3digo en el sistema del cliente cuando un usuario se conecta al servidor."}], "id": "CVE-2019-3856", "lastModified": "2023-11-07T03:10:14.943", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-03-25T19:29:01.790", "references": [{"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:0679"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:1175"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:1652"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:1791"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:1943"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:2399"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3856"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/"}, {"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://seclists.org/bugtraq/2019/Apr/25"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20190327-0005/"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2019/dsa-4431"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.libssh2.org/CVE-2019-3856.html"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-787"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank the libssh2 project for reporting this issue. Upstream acknowledges Chris Coulson (Canonical Ltd.) as the original reporter.", "affected_release": [{"advisory": "RHSA-2019:1652", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "libssh2-0:1.4.2-3.el6_10.1", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2019-07-02T00:00:00Z"}, {"advisory": "RHSA-2019:0679", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "libssh2-0:1.4.3-12.el7_6.2", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2019-03-28T00:00:00Z"}, {"advisory": "RHSA-2019:2399", "cpe": "cpe:/o:redhat:rhel_aus:7.3", "package": "libssh2-0:1.4.3-11.el7_3.1", "product_name": "Red Hat Enterprise Linux 7.3 Advanced Update Support", "release_date": "2019-08-07T00:00:00Z"}, {"advisory": "RHSA-2019:2399", "cpe": "cpe:/o:redhat:rhel_tus:7.3", "package": "libssh2-0:1.4.3-11.el7_3.1", "product_name": "Red Hat Enterprise Linux 7.3 Telco Extended Update Support", "release_date": "2019-08-07T00:00:00Z"}, {"advisory": "RHSA-2019:2399", "cpe": "cpe:/o:redhat:rhel_e4s:7.3", "package": "libssh2-0:1.4.3-11.el7_3.1", "product_name": "Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions", "release_date": "2019-08-07T00:00:00Z"}, {"advisory": "RHSA-2019:1943", "cpe": "cpe:/o:redhat:rhel_eus:7.4", "package": "libssh2-0:1.4.3-11.el7_4.1", "product_name": "Red Hat Enterprise Linux 7.4 Extended Update Support", "release_date": "2019-07-30T00:00:00Z"}, {"advisory": "RHSA-2019:1791", "cpe": "cpe:/o:redhat:rhel_eus:7.5", "package": "libssh2-0:1.4.3-11.el7_5.1", "product_name": "Red Hat Enterprise Linux 7.5 Extended Update Support", "release_date": "2019-07-16T00:00:00Z"}, {"advisory": "RHSA-2019:1175", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "virt:rhel-8000020190510171727.55190bc5", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-05-14T00:00:00Z"}], "bugzilla": {"description": "libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write", "id": "1687304", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1687304"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-190->CWE-787", "details": ["An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.", "An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server."], "name": "CVE-2019-3856", "package_state": [{"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Affected", "package_name": "virt:8.0.0/libssh2", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/o:redhat:rhev_hypervisor:4", "fix_state": "Will not fix", "impact": "low", "package_name": "redhat-virtualization-host", "product_name": "Red Hat Virtualization 4"}, {"cpe": "cpe:/o:redhat:rhev_hypervisor:4", "fix_state": "Will not fix", "impact": "low", "package_name": "rhvm-appliance", "product_name": "Red Hat Virtualization 4"}], "public_date": "2019-03-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-3856\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-3856\nhttps://www.libssh2.org/CVE-2019-3856.html"], "statement": "This flaw was present in libssh2 packages included in Red Hat Virtualization Hypervisor and Management Appliance, however libssh2 in these hosts is never exposed to malicious clients or servers.", "threat_severity": "Important", "upstream_fix": "libssh2 1.8.1"}