CVE-2018-20685 (GCVE-0-2018-20685)

Vulnerability from cvelistv5 – Published: 2019-01-10 00:00 – Updated: 2025-12-17 21:53
VLAI?
Summary
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.
Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T12:05:17.712Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "DSA-4387",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2019/dsa-4387"
          },
          {
            "name": "USN-3885-1",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/3885-1/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197\u0026r2=1.198\u0026f=h"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20190215-0001/"
          },
          {
            "name": "106531",
            "tags": [
              "vdb-entry",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/106531"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt"
          },
          {
            "name": "GLSA-201903-16",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/201903-16"
          },
          {
            "name": "[debian-lts-announce] 20190325 [SECURITY] [DLA 1728-1] openssh security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html"
          },
          {
            "name": "RHSA-2019:3702",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2019:3702"
          },
          {
            "name": "GLSA-202007-53",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202007-53"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2018-20685",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-17T21:53:24.729008Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-863",
                "description": "CWE-863 Incorrect Authorization",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-17T21:53:56.287Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2019-01-10T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-12-13T00:00:00.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "name": "DSA-4387",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.debian.org/security/2019/dsa-4387"
        },
        {
          "name": "USN-3885-1",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://usn.ubuntu.com/3885-1/"
        },
        {
          "url": "https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2"
        },
        {
          "url": "https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197\u0026r2=1.198\u0026f=h"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20190215-0001/"
        },
        {
          "name": "106531",
          "tags": [
            "vdb-entry"
          ],
          "url": "http://www.securityfocus.com/bid/106531"
        },
        {
          "url": "https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt"
        },
        {
          "name": "GLSA-201903-16",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/201903-16"
        },
        {
          "name": "[debian-lts-announce] 20190325 [SECURITY] [DLA 1728-1] openssh security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html"
        },
        {
          "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html"
        },
        {
          "url": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html"
        },
        {
          "name": "RHSA-2019:3702",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2019:3702"
        },
        {
          "name": "GLSA-202007-53",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202007-53"
        },
        {
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2018-20685",
    "datePublished": "2019-01-10T00:00:00.000Z",
    "dateReserved": "2019-01-10T00:00:00.000Z",
    "dateUpdated": "2025-12-17T21:53:56.287Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.debian.org/security/2019/dsa-4387\", \"name\": \"DSA-4387\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://usn.ubuntu.com/3885-1/\", \"name\": \"USN-3885-1\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197\u0026r2=1.198\u0026f=h\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20190215-0001/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.securityfocus.com/bid/106531\", \"name\": \"106531\", \"tags\": [\"vdb-entry\", \"x_transferred\"]}, {\"url\": \"https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.gentoo.org/glsa/201903-16\", \"name\": \"GLSA-201903-16\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html\", \"name\": \"[debian-lts-announce] 20190325 [SECURITY] [DLA 1728-1] openssh security update\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2019:3702\", \"name\": \"RHSA-2019:3702\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://security.gentoo.org/glsa/202007-53\", \"name\": \"GLSA-202007-53\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-05T12:05:17.712Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2018-20685\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-12-17T21:53:24.729008Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863 Incorrect Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-12-17T21:53:01.752Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"datePublic\": \"2019-01-10T00:00:00.000Z\", \"references\": [{\"url\": \"https://www.debian.org/security/2019/dsa-4387\", \"name\": \"DSA-4387\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://usn.ubuntu.com/3885-1/\", \"name\": \"USN-3885-1\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2\"}, {\"url\": \"https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197\u0026r2=1.198\u0026f=h\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20190215-0001/\"}, {\"url\": \"http://www.securityfocus.com/bid/106531\", \"name\": \"106531\", \"tags\": [\"vdb-entry\"]}, {\"url\": \"https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt\"}, {\"url\": \"https://security.gentoo.org/glsa/201903-16\", \"name\": \"GLSA-201903-16\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html\", \"name\": \"[debian-lts-announce] 20190325 [SECURITY] [DLA 1728-1] openssh security update\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html\"}, {\"url\": \"https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html\"}, {\"url\": \"https://access.redhat.com/errata/RHSA-2019:3702\", \"name\": \"RHSA-2019:3702\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://security.gentoo.org/glsa/202007-53\", \"name\": \"GLSA-202007-53\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2022-12-13T00:00:00.000Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2018-20685\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-17T21:53:56.287Z\", \"dateReserved\": \"2019-01-10T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2019-01-10T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.