ubuntu-cve-2020-17534
Vulnerability from osv_ubuntu
Published
2021-01-11 16:15
Modified
2026-05-20 14:52
Summary
Details

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6

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": "libnb-absolutelayout-java",
            "binary_version": "8.1+dfsg2-3"
          },
          {
            "binary_name": "libnb-apisupport3-java",
            "binary_version": "8.1+dfsg2-3"
          },
          {
            "binary_name": "libnb-ide14-java",
            "binary_version": "8.1+dfsg2-3"
          },
          {
            "binary_name": "libnb-java5-java",
            "binary_version": "8.1+dfsg2-3"
          },
          {
            "binary_name": "netbeans",
            "binary_version": "8.1+dfsg2-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "netbeans",
        "purl": "pkg:deb/ubuntu/netbeans@8.1+dfsg2-3?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.0.2+dfsg1-4",
        "8.0.2+dfsg1-5",
        "8.1+dfsg1-1",
        "8.1+dfsg2-1",
        "8.1+dfsg2-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnb-absolutelayout-java",
            "binary_version": "10.0-3ubuntu2~18.04.1"
          },
          {
            "binary_name": "libnb-apisupport3-java",
            "binary_version": "10.0-3ubuntu2~18.04.1"
          },
          {
            "binary_name": "libnb-ide14-java",
            "binary_version": "10.0-3ubuntu2~18.04.1"
          },
          {
            "binary_name": "libnb-java5-java",
            "binary_version": "10.0-3ubuntu2~18.04.1"
          },
          {
            "binary_name": "netbeans",
            "binary_version": "10.0-3ubuntu2~18.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "netbeans",
        "purl": "pkg:deb/ubuntu/netbeans@10.0-3ubuntu2~18.04.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.1+dfsg3-4",
        "10.0-3~18.04.1ubuntu1",
        "10.0-3ubuntu2~18.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnb-absolutelayout-java",
            "binary_version": "10.0-3ubuntu3"
          },
          {
            "binary_name": "libnb-apisupport3-java",
            "binary_version": "10.0-3ubuntu3"
          },
          {
            "binary_name": "libnb-ide14-java",
            "binary_version": "10.0-3ubuntu3"
          },
          {
            "binary_name": "libnb-java5-java",
            "binary_version": "10.0-3ubuntu3"
          },
          {
            "binary_name": "netbeans",
            "binary_version": "10.0-3ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "netbeans",
        "purl": "pkg:deb/ubuntu/netbeans@10.0-3ubuntu3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.0-3ubuntu3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnb-absolutelayout-java",
            "binary_version": "12.1-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "netbeans",
        "purl": "pkg:deb/ubuntu/netbeans@12.1-3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "12.1-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnb-absolutelayout-java",
            "binary_version": "12.1-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "netbeans",
        "purl": "pkg:deb/ubuntu/netbeans@12.1-3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "12.1-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnb-absolutelayout-java",
            "binary_version": "12.1-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "netbeans",
        "purl": "pkg:deb/ubuntu/netbeans@12.1-3?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "12.1-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnb-absolutelayout-java",
            "binary_version": "12.1-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "netbeans",
        "purl": "pkg:deb/ubuntu/netbeans@12.1-3build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "12.1-3",
        "12.1-3build1"
      ]
    }
  ],
  "aliases": [],
  "details": "There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in `webkit` subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6",
  "id": "UBUNTU-CVE-2020-17534",
  "modified": "2026-05-20T14:52:19Z",
  "published": "2021-01-11T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-17534"
    },
    {
      "type": "REPORT",
      "url": "https://lists.apache.org/thread.html/ra6119c0cdfccf051a846fa11b61364f5df9e7db93c310706a947f86a%40%3Cdev.netbeans.apache.org%3E"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-17534"
    }
  ],
  "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-2020-17534"
  ]
}



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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

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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.
  • 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.