CVE-2021-27905 (GCVE-0-2021-27905)

Vulnerability from cvelistv5 – Published: 2021-04-13 06:35 – Updated: 2024-08-03 21:33
VLAI
Title
SSRF vulnerability with the Replication handler
Summary
The ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has a "masterUrl" (also "leaderUrl" alias) parameter that is used to designate another ReplicationHandler on another Solr core to replicate index data into the local core. To prevent a SSRF vulnerability, Solr ought to check these parameters against a similar configuration it uses for the "shards" parameter. Prior to this bug getting fixed, it did not. This problem affects essentially all Solr versions prior to it getting fixed in 8.8.2.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1236 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache Solr Affected: Apache Solr , < 8.8.2 (custom)
guessed Create a notification for this product.
Credits
Reported by Caolinhong(Skay) from QI-ANXIN Cert (QI-ANXIN Technology Group Inc.)
Show details on NVD website
To clipboard 

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            "value": "La funci\u00f3n ReplicationHandler (normalmente registrado en \"/replication\" bajo un core Solr) en Apache Solr presenta un par\u00e1metro \"masterUrl\" (tambi\u00e9n se conoce como \"leaderUrl\") que es usada para designar otro ReplicationHandler en otro core Solr para replicar datos de \u00edndice en el core local .\u0026#xa0;Para impedir una vulnerabilidad de SSRF, Solr deber\u00eda comparar estos par\u00e1metros con una configuraci\u00f3n similar que usa para el par\u00e1metro \"shards\".\u0026#xa0;Antes de que fuera corregido este bug, no era as\u00ed.\u0026#xa0;Este problema afecta esencialmente a todas las versiones de Solr anteriores a que fuese corregido en la versi\u00f3n 8.8.2"
          }
        ],
        "id": "CVE-2021-27905",
        "lastModified": "2024-11-21T05:58:44.907",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 7.5,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-04-13T07:15:12.137",
        "references": [
          {
            "source": "security@apache.org",
            "tags": [
              "Mailing List",
              "Vendor Advisory"
            ],
            "url": "https://lists.apache.org/thread.html/r0ddc3a82bd7523b1453cb7a5e09eb5559517145425074a42eb326b10%40%3Cannounce.apache.org%3E"
          },
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              "Third Party Advisory"
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            "url": "https://security.netapp.com/advisory/ntap-20210611-0009/"
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        ],
        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-918"
              }
            ],
            "source": "security@apache.org",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-918"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2025-11-21T16:18:08+00:00",
      "cve": "CVE-2021-27905",
      "id": "CVE-2021-27905",
      "initial_release_date": "2021-04-12T00:00:00+00:00",
      "product_status:known_affected": "4",
      "product_status:known_not_affected": "3",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "solr: SSRF vulnerability with the Replication handler",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-27905.json",
      "version": "3"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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