CVE-2021-30640 (GCVE-0-2021-30640)

Vulnerability from cvelistv5 – Published: 2021-07-12 14:55 – Updated: 2024-08-03 22:40
VLAI
Title
Auth weakness in JNDIRealm
Summary
A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
CWE
  • Authentication weaknees
Assigner
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache Tomcat Affected: Apache Tomcat 10 10.0.0-M1 to 10.0.5
Affected: Apache Tomcat 9 9.0.0.M1 to 9.0.45
Affected: Apache Tomcat 8.5 8.5.0 to 8.5.65
Affected: Apache Tomcat 7 7.0.0 to 7.0.108
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            "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
          }
        ],
        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-116"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T23:11:29+00:00",
      "cve": "CVE-2021-30640",
      "id": "CVE-2021-30640",
      "initial_release_date": "2021-07-12T00:00:00+00:00",
      "product_status:fixed": "39",
      "product_status:known_affected": "5",
      "product_status:known_not_affected": "30",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "tomcat: JNDI realm authentication weakness",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-30640.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





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.



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.