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The impact is modifying the permissions of the target directory on the client side."}, {"lang": "es", "value": "En OpenSSH 7.9, scp.c en el cliente scp permite que los servidores SSH omitan las restricciones de acceso planeadas mediante un nombre de archivo \".\" o un nombre de archivo vac\u00edo. 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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: scp client improper directory name validation", "id": "1665785", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1665785"}, "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:H/I:N/A:N", "status": "verified"}, "cwe": "CWE-20", "details": ["In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side."], "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. Removing the openssh-clients package will make binaries like scp and ssh etc unavailable on that system.\nNote: To exploit this flaw, the victim needs to connect to a malicious SSH server or MITM (Man-in-the-middle) the scp connection, both of which can be detected by the system administrator via a change in the host key of the SSH server. Further, if connections via scp are made to only trusted SSH servers, then those use-cases are not vulnerable to this security flaw."}, "name": "CVE-2018-20685", "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-2018-20685\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-20685\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=1665785#c4", "threat_severity": "Moderate"}

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