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"vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "descriptions": [{"lang": "en", "value": "An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file)."}, {"lang": "es", "value": "Se ha descubierto un problema en OpenSSH 7.9. Debido a que la implementaci\u00f3n de SCP deriva del rcp 1983, el servidor elige qu\u00e9 archivos/directorios se est\u00e1n enviando al cliente. Sin embargo, el cliente scp solo realiza la validaci\u00f3n superficial del nombre de objeto devuelto (solo se evitan los ataques de salto de directorio). Un servidor scp malicioso (o atacante Man-in-the-Middle) puede sobrescribir archivos arbitrarios en el directorio objetivo del cliente scp. Si se realiza la operaci\u00f3n recursiva (-r), el servidor tambi\u00e9n puede manipular subdirectorios (por ejemplo, para sobrescribir el archivo .ssh/authorized_keys)"}], "id": "CVE-2019-6111", "lastModified": "2024-11-21T04:45:57.900", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.8, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "[email protected]", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "[email protected]", "type": "Primary"}]}, "published": "2019-01-31T18:29:00.867", "references": [{"source": "[email protected]", "tags": ["Broken Link"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.html"}, {"source": "[email protected]", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2019/04/18/1"}, {"source": "[email protected]", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2022/08/02/1"}, {"source": "[email protected]", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/106741"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:3702"}, {"source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1677794"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"}, {"source": "[email protected]", "tags": ["Release Notes"], "url": "https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c"}, {"source": "[email protected]", "url": "https://lists.apache.org/thread.html/c45d9bc90700354b58fb7455962873c44229841880dcb64842fa7d23%40%3Cdev.mina.apache.org%3E"}, {"source": "[email protected]", "url": "https://lists.apache.org/thread.html/c7301cab36a86825359e1b725fc40304d1df56dc6d107c1fe885148b%40%3Cdev.mina.apache.org%3E"}, {"source": "[email protected]", "url": "https://lists.apache.org/thread.html/d540139359de999b0f1c87d05b715be4d7d4bec771e1ae55153c5c7a%40%3Cdev.mina.apache.org%3E"}, {"source": "[email protected]", "url": "https://lists.apache.org/thread.html/e47597433b351d6e01a5d68d610b4ba195743def9730e49561e8cf3f%40%3Cdev.mina.apache.org%3E"}, {"source": "[email protected]", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html"}, {"source": "[email protected]", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3YVQ2BPTOVDCFDVNC2GGF5P5ISFG37G/"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/201903-16"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20190213-0001/"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": 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{"affected_release": [{"advisory": "RHSA-2019:3702", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "openssh-0:8.0p1-3.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-11-05T00:00:00Z"}, {"advisory": "RHSA-2019:3702", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "openssh-0:8.0p1-3.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-11-05T00:00:00Z"}], "bugzilla": {"description": "openssh: Improper validation of object names allows malicious server to overwrite files via scp client", "id": "1666127", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1666127"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N", "status": "verified"}, "cwe": "CWE-20", "details": ["An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file)."], "mitigation": {"lang": "en:us", "value": "This issue only affects the users of scp binary which is a part of openssh-clients package. Other usage of SSH protocol or other ssh clients is not affected. Administrators can uninstall openssh-clients for additional protection against accidental usage of this binary. Removal of openssh-clients package will make the packaged binaries like scp, ssh etc unavailable. \nNote: This flaw requires a malicious MITM scp server for exploitation. Use cases where trusted SCP servers are used are not affected by this flaw."}, "name": "CVE-2019-6111", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2018-11-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-6111\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-6111\nhttps://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt"], "statement": "This issue affects the scp client shipped with openssh. The SSH protocol or the SSH client is not affected. For more detailed analysis please refer to: https://bugzilla.redhat.com/show_bug.cgi?id=1666127#c2", "threat_severity": "Moderate"}