ubuntu-cve-2020-27216
Vulnerability from osv_ubuntu
Published
2020-10-23 13:15
Modified
2025-10-24 04:48
Summary
Details

In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty",
            "binary_version": "6.1.26-1ubuntu1.2"
          },
          {
            "binary_name": "libjetty-extra",
            "binary_version": "6.1.26-1ubuntu1.2"
          },
          {
            "binary_name": "libjetty-extra-java",
            "binary_version": "6.1.26-1ubuntu1.2"
          },
          {
            "binary_name": "libjetty-java",
            "binary_version": "6.1.26-1ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "jetty",
        "purl": "pkg:deb/ubuntu/jetty@6.1.26-1ubuntu1.2?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1.26-1ubuntu1",
        "6.1.26-1ubuntu1.1",
        "6.1.26-1ubuntu1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty8",
            "binary_version": "8.1.3-9"
          },
          {
            "binary_name": "libjetty8-extra-java",
            "binary_version": "8.1.3-9"
          },
          {
            "binary_name": "libjetty8-java",
            "binary_version": "8.1.3-9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "jetty8",
        "purl": "pkg:deb/ubuntu/jetty8@8.1.3-9?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.1.3-8",
        "8.1.3-9"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjetty-extra",
            "binary_version": "6.1.26-5ubuntu0.1"
          },
          {
            "binary_name": "libjetty-extra-java",
            "binary_version": "6.1.26-5ubuntu0.1"
          },
          {
            "binary_name": "libjetty-java",
            "binary_version": "6.1.26-5ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "jetty",
        "purl": "pkg:deb/ubuntu/jetty@6.1.26-5ubuntu0.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1.26-5",
        "6.1.26-5ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty8",
            "binary_version": "8.1.19-1"
          },
          {
            "binary_name": "libjetty8-extra-java",
            "binary_version": "8.1.19-1"
          },
          {
            "binary_name": "libjetty8-java",
            "binary_version": "8.1.19-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "jetty8",
        "purl": "pkg:deb/ubuntu/jetty8@8.1.19-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.1.17-2",
        "8.1.18-1",
        "8.1.18-2",
        "8.1.18-3",
        "8.1.19-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.2.14-1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.2.14-1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.2.14-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.2.14-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.2.14-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.4.15-1~18.04.1ubuntu1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.4.15-1~18.04.1ubuntu1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.4.15-1~18.04.1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.4.15-1~18.04.1ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.2.22-2",
        "9.2.22-3",
        "9.2.23-1",
        "9.4.15-1~18.04.1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.4.26-1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.4.26-1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.4.26-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.4.26-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.4.18-2build2",
        "9.4.26-1"
      ]
    }
  ],
  "aliases": [],
  "details": "In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system\u0027s temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.",
  "id": "UBUNTU-CVE-2020-27216",
  "modified": "2025-10-24T04:48:50Z",
  "published": "2020-10-23T13:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-27216"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=567921"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/eclipse/jetty.project/commit/53e0e0e9b25a6309bf24ee3b10984f4145701edb"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/eclipse/jetty.project/commit/9ad6beb80543b392c91653f6bfce233fc75b9d5f"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/eclipse/jetty.project/security/advisories/GHSA-g3wg-6mcf-8jj6"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/eclipse/jetty.project/security/advisories/GHSA-g3wg-6mcf-8jj6#advisory-comment-63053"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-27216"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-27216"
  ]
}



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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.
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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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