ubuntu-cve-2021-42340
Vulnerability from osv_ubuntu
Published
2021-10-14 20:15
Modified
2025-07-14 04:43
Summary
Details

The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "tomcat8",
        "purl": "pkg:deb/ubuntu/tomcat8@8.0.32-1ubuntu1.13+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.0.26-1",
        "8.0.28-1",
        "8.0.30-1",
        "8.0.32-1",
        "8.0.32-1ubuntu1",
        "8.0.32-1ubuntu1.1",
        "8.0.32-1ubuntu1.2",
        "8.0.32-1ubuntu1.3",
        "8.0.32-1ubuntu1.4",
        "8.0.32-1ubuntu1.5",
        "8.0.32-1ubuntu1.6",
        "8.0.32-1ubuntu1.7",
        "8.0.32-1ubuntu1.8",
        "8.0.32-1ubuntu1.9",
        "8.0.32-1ubuntu1.10",
        "8.0.32-1ubuntu1.11",
        "8.0.32-1ubuntu1.13",
        "8.0.32-1ubuntu1.13+esm1"
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "tomcat8",
        "purl": "pkg:deb/ubuntu/tomcat8@8.5.39-1ubuntu1~18.04.3+esm5?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.5.21-1ubuntu1",
        "8.5.29-1",
        "8.5.30-1",
        "8.5.30-1ubuntu1",
        "8.5.30-1ubuntu1.2",
        "8.5.30-1ubuntu1.3",
        "8.5.30-1ubuntu1.4",
        "8.5.39-1ubuntu1~18.04.1",
        "8.5.39-1ubuntu1~18.04.2",
        "8.5.39-1ubuntu1~18.04.3",
        "8.5.39-1ubuntu1~18.04.3+esm1",
        "8.5.39-1ubuntu1~18.04.3+esm2",
        "8.5.39-1ubuntu1~18.04.3+esm3",
        "8.5.39-1ubuntu1~18.04.3+esm4",
        "8.5.39-1ubuntu1~18.04.3+esm5"
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.16-3ubuntu0.18.04.2+esm7?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.16-3~18.04.1",
        "9.0.16-3ubuntu0.18.04.1",
        "9.0.16-3ubuntu0.18.04.2",
        "9.0.16-3ubuntu0.18.04.2+esm1",
        "9.0.16-3ubuntu0.18.04.2+esm2",
        "9.0.16-3ubuntu0.18.04.2+esm3",
        "9.0.16-3ubuntu0.18.04.2+esm4",
        "9.0.16-3ubuntu0.18.04.2+esm5",
        "9.0.16-3ubuntu0.18.04.2+esm6",
        "9.0.16-3ubuntu0.18.04.2+esm7"
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.31-1ubuntu0.9+esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.24-1",
        "9.0.27-1",
        "9.0.31-1",
        "9.0.31-1ubuntu0.1",
        "9.0.31-1ubuntu0.2",
        "9.0.31-1ubuntu0.3",
        "9.0.31-1ubuntu0.4",
        "9.0.31-1ubuntu0.5",
        "9.0.31-1ubuntu0.6",
        "9.0.31-1ubuntu0.7",
        "9.0.31-1ubuntu0.8",
        "9.0.31-1ubuntu0.9",
        "9.0.31-1ubuntu0.9+esm1",
        "9.0.31-1ubuntu0.9+esm2"
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.58-1ubuntu0.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.43-3",
        "9.0.54-1",
        "9.0.55-1",
        "9.0.58-1",
        "9.0.58-1ubuntu0.1",
        "9.0.58-1ubuntu0.2"
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.70-2ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.70-1ubuntu1",
        "9.0.70-2",
        "9.0.70-2ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:25.04",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.70-2ubuntu1.25.04.2?arch=source\u0026distro=plucky"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.70-2ubuntu1.1",
        "9.0.70-2ubuntu1.25.04.1",
        "9.0.70-2ubuntu1.25.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.",
  "id": "UBUNTU-CVE-2021-42340",
  "modified": "2025-07-14T04:43:30Z",
  "published": "2021-10-14T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-42340"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2021/10/14/1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/apache/tomcat/commit/80f1438ec45e77a07b96419808971838d259eb47"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/apache/tomcat/commit/d27535bdee95d252418201eb21e9d29476aa6b6a"
    },
    {
      "type": "REPORT",
      "url": "https://lists.apache.org/thread.html/r83a35be60f06aca2065f188ee542b9099695d57ced2e70e0885f905c%40%3Cannounce.tomcat.apache.org%3E"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-42340"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-42340"
  ],
  "withdrawn": "2025-08-21T16:42:24Z"
}



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