CVE-2020-16171 (GCVE-0-2020-16171)

Vulnerability from cvelistv5 – Published: 2020-09-21 13:07 – Updated: 2024-08-04 13:37
VLAI
Summary
An issue was discovered in Acronis Cyber Backup before 12.5 Build 16342. Some API endpoints on port 9877 under /api/ams/ accept an additional custom Shard header. The value of this header is afterwards used in a separate web request issued by the application itself. This can be abused to conduct SSRF attacks against otherwise unreachable Acronis services that are bound to localhost such as the NotificationService on 127.0.0.1:30572.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 29/100 over 2230 records in the last 180 days details
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T13:37:54.193Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://seclists.org/fulldisclosure/2020/Sep/33"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in Acronis Cyber Backup before 12.5 Build 16342. Some API endpoints on port 9877 under /api/ams/ accept an additional custom Shard header. The value of this header is afterwards used in a separate web request issued by the application itself. This can be abused to conduct SSRF attacks against otherwise unreachable Acronis services that are bound to localhost such as the NotificationService on 127.0.0.1:30572."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-09-21T13:07:07.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://seclists.org/fulldisclosure/2020/Sep/33"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-16171",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue was discovered in Acronis Cyber Backup before 12.5 Build 16342. Some API endpoints on port 9877 under /api/ams/ accept an additional custom Shard header. The value of this header is afterwards used in a separate web request issued by the application itself. This can be abused to conduct SSRF attacks against otherwise unreachable Acronis services that are bound to localhost such as the NotificationService on 127.0.0.1:30572."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "http://seclists.org/fulldisclosure/2020/Sep/33",
              "refsource": "MISC",
              "url": "http://seclists.org/fulldisclosure/2020/Sep/33"
            },
            {
              "name": "https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails/",
              "refsource": "MISC",
              "url": "https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-16171",
    "datePublished": "2020-09-21T13:07:07.000Z",
    "dateReserved": "2020-07-31T00:00:00.000Z",
    "dateUpdated": "2024-08-04T13:37:54.193Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2020-16171",
      "date": "2026-11-06",
      "epss": "0.05505",
      "percentile": "0.92832"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "E4A6690B-6355-4BA3-844C-8454A9EF9B2D",
                    "versionEndIncluding": "12.5",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:-:*:*:*:*:*:*",
                    "matchCriteriaId": "3117B8C4-C8E6-4F50-923D-5BF50222337D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:10130:*:*:*:*:*:*",
                    "matchCriteriaId": "C2ECE37D-291E-4D07-9D8B-79D09D78FA35",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:10330:*:*:*:*:*:*",
                    "matchCriteriaId": "9826E331-15CB-454D-80E6-B39B380894F7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:11010:*:*:*:*:*:*",
                    "matchCriteriaId": "89A4839A-EF22-4E28-82ED-5828207D7ADE",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:13160:*:*:*:*:*:*",
                    "matchCriteriaId": "A847D357-EB6F-4CBF-AEB7-20ABF6B6A0E3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:13400:*:*:*:*:*:*",
                    "matchCriteriaId": "6677430F-19A5-4D7A-91F5-9D906DC48174",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:14280:*:*:*:*:*:*",
                    "matchCriteriaId": "C38873F8-EB4E-4B20-B4BB-A8E9CC2E4FC2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:14330:*:*:*:*:*:*",
                    "matchCriteriaId": "00644AD1-6114-4470-8AD6-C2D975329A71",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:16180:*:*:*:*:*:*",
                    "matchCriteriaId": "49694CEB-C054-4D02-A7BA-D57E7A1538C3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:16318:*:*:*:*:*:*",
                    "matchCriteriaId": "3FE3F243-202A-4EF5-B4B8-F912B6763F22",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:16327:*:*:*:*:*:*",
                    "matchCriteriaId": "D5831900-150B-4DAD-A17D-C974F8F91C8D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:7641:*:*:*:*:*:*",
                    "matchCriteriaId": "3F540D84-5562-41AE-9294-64F19596149E",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:7970:*:*:*:*:*:*",
                    "matchCriteriaId": "122DEB91-6506-4F94-9C79-887EECE68A7A",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:8850:*:*:*:*:*:*",
                    "matchCriteriaId": "0B6EA731-C344-424E-B5FB-291CD59DDAB5",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:acronis:cyber_backup:12.5:9010:*:*:*:*:*:*",
                    "matchCriteriaId": "EF144B8E-E42F-41E3-8E23-88B1F862D14A",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "An issue was discovered in Acronis Cyber Backup before 12.5 Build 16342. Some API endpoints on port 9877 under /api/ams/ accept an additional custom Shard header. The value of this header is afterwards used in a separate web request issued by the application itself. This can be abused to conduct SSRF attacks against otherwise unreachable Acronis services that are bound to localhost such as the NotificationService on 127.0.0.1:30572."
          },
          {
            "lang": "es",
            "value": "Se detect\u00f3 un problema en Acronis Cyber ??Backup versiones anteriores a 12.5 Build 16342. Algunos endpoints de la API en el puerto 9877 en /api/ams/ aceptan un encabezado Shard personalizado adicional.\u0026#xa0;El valor de este encabezado es usado posteriormente en una petici\u00f3n web separada emitida por la propia aplicaci\u00f3n. Esto puede ser abusado para conducir ataques de tipo SSRF contra servicios de Acronis que de otro modo ser\u00edan inalcanzables y que est\u00e1n vinculados a localhost, tal y como NotificationService versi\u00f3n 127.0.0.1:30572"
          }
        ],
        "id": "CVE-2020-16171",
        "lastModified": "2024-11-21T05:06:54.360",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 6.4,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 4.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 2.5,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2020-09-21T14:15:13.370",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2020/Sep/33"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2020/Sep/33"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails/"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-918"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.