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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 los paquetes SSH_MSG_CHANNEL_REQUEST con una se\u00f1al de salida. 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{"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 SSH packet processing channel resulting in out of bounds write", "id": "1687305", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1687305"}, "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 SSH_MSG_CHANNEL_REQUEST packets with an exit signal 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 SSH_MSG_CHANNEL_REQUEST packets with an exit signal 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-2019-3857", "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-2019-3857\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-3857\nhttps://www.libssh2.org/CVE-2019-3857.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"}