CVE-2020-26941 (GCVE-0-2020-26941)

Vulnerability from cvelistv5 – Published: 2021-01-21 14:35 – Updated: 2024-08-04 16:03
VLAI
Summary
A local (authenticated) low-privileged user can exploit a behavior in an ESET installer to achieve arbitrary file overwrite (deletion) of any file via a symlink, due to insecure permissions. The possibility of exploiting this vulnerability is limited and can only take place during the installation phase of ESET products. Furthermore, exploitation can only succeed when Self-Defense is disabled. Affected products are: ESET NOD32 Antivirus, ESET Internet Security, ESET Smart Security, ESET Smart Security Premium versions 13.2 and lower; ESET Endpoint Antivirus, ESET Endpoint Security, ESET NOD32 Antivirus Business Edition, ESET Smart Security Business Edition versions 7.3 and lower; ESET File Security for Microsoft Windows Server, ESET Mail Security for Microsoft Exchange Server, ESET Mail Security for IBM Domino, ESET Security for Kerio, ESET Security for Microsoft SharePoint Server versions 7.2 and lower.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 29/100 over 2166 records in the last 180 days details
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T16:03:22.984Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://support.eset.com/en/ca7794-local-privilege-escalation-vulnerability-fixed-in-eset-products-for-windows"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A local (authenticated) low-privileged user can exploit a behavior in an ESET installer to achieve arbitrary file overwrite (deletion) of any file via a symlink, due to insecure permissions. The possibility of exploiting this vulnerability is limited and can only take place during the installation phase of ESET products. Furthermore, exploitation can only succeed when Self-Defense is disabled. Affected products are: ESET NOD32 Antivirus, ESET Internet Security, ESET Smart Security, ESET Smart Security Premium versions 13.2 and lower; ESET Endpoint Antivirus, ESET Endpoint Security, ESET NOD32 Antivirus Business Edition, ESET Smart Security Business Edition versions 7.3 and lower; ESET File Security for Microsoft Windows Server, ESET Mail Security for Microsoft Exchange Server, ESET Mail Security for IBM Domino, ESET Security for Kerio, ESET Security for Microsoft SharePoint Server versions 7.2 and lower."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-01-21T14:35:19.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://support.eset.com/en/ca7794-local-privilege-escalation-vulnerability-fixed-in-eset-products-for-windows"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-26941",
          "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": "A local (authenticated) low-privileged user can exploit a behavior in an ESET installer to achieve arbitrary file overwrite (deletion) of any file via a symlink, due to insecure permissions. The possibility of exploiting this vulnerability is limited and can only take place during the installation phase of ESET products. Furthermore, exploitation can only succeed when Self-Defense is disabled. Affected products are: ESET NOD32 Antivirus, ESET Internet Security, ESET Smart Security, ESET Smart Security Premium versions 13.2 and lower; ESET Endpoint Antivirus, ESET Endpoint Security, ESET NOD32 Antivirus Business Edition, ESET Smart Security Business Edition versions 7.3 and lower; ESET File Security for Microsoft Windows Server, ESET Mail Security for Microsoft Exchange Server, ESET Mail Security for IBM Domino, ESET Security for Kerio, ESET Security for Microsoft SharePoint Server versions 7.2 and lower."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://support.eset.com/en/ca7794-local-privilege-escalation-vulnerability-fixed-in-eset-products-for-windows",
              "refsource": "MISC",
              "url": "https://support.eset.com/en/ca7794-local-privilege-escalation-vulnerability-fixed-in-eset-products-for-windows"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-26941",
    "datePublished": "2021-01-21T14:35:19.000Z",
    "dateReserved": "2020-10-10T00:00:00.000Z",
    "dateUpdated": "2024-08-04T16:03:22.984Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2020-26941",
      "date": "2026-11-09",
      "epss": "0.00337",
      "percentile": "0.27236"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:eset:endpoint_antivirus:*:*:*:*:*:-:*:*",
                    "matchCriteriaId": "8AB7C2EB-F12D-4F5A-86A0-D1C71B10D301",
                    "versionEndIncluding": "7.3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:endpoint_security:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "52BCDA83-E591-4BBB-B173-3802182B8728",
                    "versionEndIncluding": "7.3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:file_security:*:*:*:*:*:windows_server:*:*",
                    "matchCriteriaId": "B726EEB4-03A5-4025-8C8E-66625338A0FD",
                    "versionEndIncluding": "7.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:internet_security:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "E2B75F9E-CCBE-49E3-A49F-054EE92E1D0C",
                    "versionEndIncluding": "13.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:internet_security:1294:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B429D321-4E00-451F-BFDF-A61BF20CCC77",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:mail_security:*:*:*:*:*:domino:*:*",
                    "matchCriteriaId": "30D87B08-6868-41A2-93F5-1B732A07F652",
                    "versionEndIncluding": "7.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:mail_security:*:*:*:*:*:exchange_server:*:*",
                    "matchCriteriaId": "52072A74-AA1E-48B9-ACBC-B97BA215F9DC",
                    "versionEndIncluding": "7.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:nod32_antivirus:*:*:*:*:business:*:*:*",
                    "matchCriteriaId": "795CFE63-4F55-4B8E-9E4E-A6510895B637",
                    "versionEndIncluding": "7.3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:nod32_antivirus:*:*:*:*:*:-:*:*",
                    "matchCriteriaId": "E95834A0-B683-4CCE-B3FB-1387071FB778",
                    "versionEndIncluding": "13.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:security:*:*:*:*:*:kerio:*:*",
                    "matchCriteriaId": "464764FF-8739-407A-B9D3-9F871E2933B2",
                    "versionEndIncluding": "7.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:security:*:*:*:*:*:sharepoint_server:*:*",
                    "matchCriteriaId": "A171F5E4-F90A-41CE-829B-5A2F0DC0BC86",
                    "versionEndIncluding": "7.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:smart_security:*:*:*:*:business:*:*:*",
                    "matchCriteriaId": "4F7FAB9F-5A35-4D61-B325-8286EB9A7577",
                    "versionEndIncluding": "7.3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:smart_security:*:*:*:*:-:*:*:*",
                    "matchCriteriaId": "E4194A89-6382-4174-B592-15219A0EFFEE",
                    "versionEndIncluding": "13.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:eset:smart_security:*:*:*:*:premium:*:*:*",
                    "matchCriteriaId": "DCD75955-648A-4644-ADB4-002673AA9E3D",
                    "versionEndIncluding": "13.2",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A local (authenticated) low-privileged user can exploit a behavior in an ESET installer to achieve arbitrary file overwrite (deletion) of any file via a symlink, due to insecure permissions. The possibility of exploiting this vulnerability is limited and can only take place during the installation phase of ESET products. Furthermore, exploitation can only succeed when Self-Defense is disabled. Affected products are: ESET NOD32 Antivirus, ESET Internet Security, ESET Smart Security, ESET Smart Security Premium versions 13.2 and lower; ESET Endpoint Antivirus, ESET Endpoint Security, ESET NOD32 Antivirus Business Edition, ESET Smart Security Business Edition versions 7.3 and lower; ESET File Security for Microsoft Windows Server, ESET Mail Security for Microsoft Exchange Server, ESET Mail Security for IBM Domino, ESET Security for Kerio, ESET Security for Microsoft SharePoint Server versions 7.2 and lower."
          },
          {
            "lang": "es",
            "value": "Un usuario local (autenticado) con pocos privilegios puede explotar un comportamiento en un instalador de ESET para lograr la sobrescritura (eliminaci\u00f3n) arbitraria de cualquier archivo por medio de un enlace simb\u00f3lico, debido a permisos no seguros.\u0026#xa0;La posibilidad de aprovechar esta vulnerabilidad es limitada y solo puede tener lugar durante la fase de instalaci\u00f3n de los productos ESET.\u0026#xa0;Adem\u00e1s, la explotaci\u00f3n solo puede tener \u00e9xito cuando Self-Defense est\u00e1 desactivada.\u0026#xa0;Los productos afectados son: ESET NOD32 Antivirus, ESET Internet Security, ESET Smart Security, ESET Smart Security Premium versiones 13.2 y anteriores;\u0026#xa0;ESET Endpoint Antivirus, ESET Endpoint Security, ESET NOD32 Antivirus Business Edition, ESET Smart Security Business Edition versiones 7.3 y anteriores;\u0026#xa0;ESET File Security para Microsoft Windows Server, ESET Mail Security para Microsoft Exchange Server, ESET Mail Security para IBM Domino, ESET Security para Kerio"
          }
        ],
        "id": "CVE-2020-26941",
        "lastModified": "2024-11-21T05:20:32.763",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 3.6,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 4.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "NONE",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-01-26T18:15:45.613",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://support.eset.com/en/ca7794-local-privilege-escalation-vulnerability-fixed-in-eset-products-for-windows"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://support.eset.com/en/ca7794-local-privilege-escalation-vulnerability-fixed-in-eset-products-for-windows"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-276"
              }
            ],
            "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
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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.