ubuntu-cve-2021-28153
Vulnerability from osv_ubuntu
Published
2021-03-11 22:15
Modified
2026-04-22 07:39
Summary
Details

An issue was discovered in GNOME GLib before 2.66.8. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION to replace a path that is a dangling symlink, it incorrectly also creates the target of the symlink as an empty file, which could conceivably have security relevance if the symlink is attacker-controlled. (If the path is a symlink to a file that already exists, then the contents of that file correctly remain unchanged.)

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.40.2-0ubuntu1.1+esm7"
          },
          {
            "binary_name": "libglib2.0-0-refdbg",
            "binary_version": "2.40.2-0ubuntu1.1+esm7"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.40.2-0ubuntu1.1+esm7"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.40.2-0ubuntu1.1+esm7"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.40.2-0ubuntu1.1+esm7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.40.2-0ubuntu1.1+esm7?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.38.0-1ubuntu1",
        "2.38.1-1",
        "2.39.1-0ubuntu1",
        "2.39.1-0ubuntu2",
        "2.39.1-0ubuntu3",
        "2.39.2-0ubuntu1",
        "2.39.2-0ubuntu2",
        "2.39.3-0ubuntu4",
        "2.39.4-0ubuntu1",
        "2.39.90-0ubuntu1",
        "2.39.91-0ubuntu2",
        "2.39.91-0ubuntu3",
        "2.39.92-2",
        "2.40.0-1",
        "2.40.0-1ubuntu1",
        "2.40.0-2",
        "2.40.2-0ubuntu1",
        "2.40.2-0ubuntu1.1",
        "2.40.2-0ubuntu1.1+esm1",
        "2.40.2-0ubuntu1.1+esm2",
        "2.40.2-0ubuntu1.1+esm3",
        "2.40.2-0ubuntu1.1+esm4",
        "2.40.2-0ubuntu1.1+esm6",
        "2.40.2-0ubuntu1.1+esm7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.48.2-0ubuntu4.8"
          },
          {
            "binary_name": "libglib2.0-0-refdbg",
            "binary_version": "2.48.2-0ubuntu4.8"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.48.2-0ubuntu4.8"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.48.2-0ubuntu4.8"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.48.2-0ubuntu4.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.48.2-0ubuntu4.8?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.48.2-0ubuntu4.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.46.1-1",
        "2.46.1-2",
        "2.47.1-1",
        "2.47.3-3",
        "2.47.4-1",
        "2.47.5-1",
        "2.47.6-1",
        "2.48.0-1ubuntu3",
        "2.48.0-1ubuntu4",
        "2.48.1-1~ubuntu16.04.1",
        "2.48.2-0ubuntu1",
        "2.48.2-0ubuntu3",
        "2.48.2-0ubuntu4",
        "2.48.2-0ubuntu4.1",
        "2.48.2-0ubuntu4.2",
        "2.48.2-0ubuntu4.3",
        "2.48.2-0ubuntu4.4",
        "2.48.2-0ubuntu4.5",
        "2.48.2-0ubuntu4.6",
        "2.48.2-0ubuntu4.7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.56.4-0ubuntu0.18.04.8"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.56.4-0ubuntu0.18.04.8"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.56.4-0ubuntu0.18.04.8"
          },
          {
            "binary_name": "libglib2.0-dev-bin",
            "binary_version": "2.56.4-0ubuntu0.18.04.8"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.56.4-0ubuntu0.18.04.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.56.4-0ubuntu0.18.04.8?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.56.4-0ubuntu0.18.04.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.54.1-1ubuntu1",
        "2.55.2-2ubuntu1",
        "2.56.0-2ubuntu1",
        "2.56.0-4ubuntu1",
        "2.56.1-2ubuntu1",
        "2.56.2-0ubuntu0.18.04.1",
        "2.56.2-0ubuntu0.18.04.2",
        "2.56.3-0ubuntu0.18.04.1",
        "2.56.4-0ubuntu0.18.04.2",
        "2.56.4-0ubuntu0.18.04.3",
        "2.56.4-0ubuntu0.18.04.4",
        "2.56.4-0ubuntu0.18.04.5",
        "2.56.4-0ubuntu0.18.04.6",
        "2.56.4-0ubuntu0.18.04.7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.64.6-1~ubuntu20.04.3"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.64.6-1~ubuntu20.04.3"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.64.6-1~ubuntu20.04.3"
          },
          {
            "binary_name": "libglib2.0-dev-bin",
            "binary_version": "2.64.6-1~ubuntu20.04.3"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.64.6-1~ubuntu20.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.64.6-1~ubuntu20.04.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.64.6-1~ubuntu20.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.62.1-1",
        "2.63.1-2",
        "2.63.1-2ubuntu1",
        "2.63.3-1",
        "2.63.3-3",
        "2.63.5-2",
        "2.64.0-1",
        "2.64.1-1",
        "2.64.2-1~fakesync1",
        "2.64.3-1~ubuntu20.04.1",
        "2.64.6-1~ubuntu20.04.1",
        "2.64.6-1~ubuntu20.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in GNOME GLib before 2.66.8. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION to replace a path that is a dangling symlink, it incorrectly also creates the target of the symlink as an empty file, which could conceivably have security relevance if the symlink is attacker-controlled. (If the path is a symlink to a file that already exists, then the contents of that file correctly remain unchanged.)",
  "id": "UBUNTU-CVE-2021-28153",
  "modified": "2026-04-22T07:39:57Z",
  "published": "2021-03-11T22:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28153"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4764-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-28153"
    }
  ],
  "related": [
    "USN-4764-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-28153"
  ]
}



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