Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2024-03-06 11:09

Modified

2026-03-20 09:47

Summary

Apache Tomcat: Information disclosure

Details

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0, 10.0.0 to 10.0.18, 9.0.0 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "tomcat",
        "purl": "pkg:bitnami/tomcat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.5.0"
            },
            {
              "fixed": "8.5.78"
            },
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.0.61"
            },
            {
              "introduced": "10.0.0"
            },
            {
              "fixed": "10.0.19"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-43980"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone10:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone11:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone12:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone1:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone2:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone3:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone4:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone5:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone6:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone7:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone8:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:10.1.0:milestone9:*:*:*:*:*:*"
    ],
    "severity": "Low"
  },
  "details": "The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0, 10.0.0 to 10.0.18, 9.0.0 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.",
  "id": "BIT-tomcat-2021-43980",
  "modified": "2026-03-20T09:47:33.381Z",
  "published": "2024-03-06T11:09:43.693Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2022/09/28/1"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/3jjqbsp6j88b198x5rmg99b1qr8ht3g3"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00029.html"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2022/dsa-5265"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43980"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Apache Tomcat: Information disclosure"
}

CVE-2021-43980 (GCVE-0-2021-43980)

Vulnerability from cvelistv5 – Published: 2022-09-28 00:00 – Updated: 2025-05-21 15:00

Title

Apache Tomcat: Information disclosure

Summary

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

Severity ?

No CVSS data available.

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

apache

References

URL

Tags

	https://lists.apache.org/thread/3jjqbsp6j88b198x5…
	http://www.openwall.com/lists/oss-security/2022/09/28/1	mailing-list
	https://lists.debian.org/debian-lts-announce/2022…	mailing-list
	https://www.debian.org/security/2022/dsa-5265	vendor-advisory

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache Tomcat	Affected: 10.1.0-M1 to 10.1.0-M12 Affected: 10.0.0-M1 to 10.0.18 Affected: 9.0.0-M1 to 9.0.60 Affected: 8.5.0 to 8.5.77

Credits

Thanks to Adam Thomas, Richard Hernandez and Ryan Schmitt for discovering the issue and working with the Tomcat security team to identify the root cause and appropriate fix.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T04:10:16.914Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread/3jjqbsp6j88b198x5rmg99b1qr8ht3g3"
          },
          {
            "name": "[oss-security] 20220928 CVE-2021-43980: Apache Tomcat: Information disclosure",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/09/28/1"
          },
          {
            "name": "[debian-lts-announce] 20221026 [SECURITY] [DLA 3160-1] tomcat9 security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00029.html"
          },
          {
            "name": "DSA-5265",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5265"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 3.7,
              "baseSeverity": "LOW",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-43980",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-21T14:59:33.357809Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-21T15:00:10.097Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Apache Tomcat",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "status": "affected",
              "version": "10.1.0-M1 to 10.1.0-M12"
            },
            {
              "status": "affected",
              "version": "10.0.0-M1 to 10.0.18"
            },
            {
              "status": "affected",
              "version": "9.0.0-M1 to 9.0.60"
            },
            {
              "status": "affected",
              "version": "8.5.0 to 8.5.77"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Thanks to Adam Thomas, Richard Hernandez and Ryan Schmitt for discovering the issue and working with the Tomcat security team to identify the root cause and appropriate fix."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "other": "important"
            },
            "type": "unknown"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-30T00:00:00.000Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "url": "https://lists.apache.org/thread/3jjqbsp6j88b198x5rmg99b1qr8ht3g3"
        },
        {
          "name": "[oss-security] 20220928 CVE-2021-43980: Apache Tomcat: Information disclosure",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/09/28/1"
        },
        {
          "name": "[debian-lts-announce] 20221026 [SECURITY] [DLA 3160-1] tomcat9 security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00029.html"
        },
        {
          "name": "DSA-5265",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5265"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Apache Tomcat: Information disclosure",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2021-43980",
    "datePublished": "2022-09-28T00:00:00.000Z",
    "dateReserved": "2021-11-17T00:00:00.000Z",
    "dateUpdated": "2025-05-21T15:00:10.097Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2021-43980 (GCVE-0-2021-43980)

Tags

Sightings

Nomenclature