ubuntu-cve-2018-25021
Vulnerability from osv_ubuntu
Published
2021-12-13 01:15
Modified
2025-07-16 04:54
Summary
Details

The TCP Server module in toxcore before 0.2.8 doesn't free the TCP priority queue under certain conditions, which allows a remote attacker to exhaust the system's memory, causing a denial of service (DoS).

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": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libtoxcore-dev",
            "binary_version": "0.2.10-1build2"
          },
          {
            "binary_name": "libtoxcore2",
            "binary_version": "0.2.10-1build2"
          },
          {
            "binary_name": "libtoxcore2-dbgsym",
            "binary_version": "0.2.10-1build2"
          },
          {
            "binary_name": "toxcore-utils",
            "binary_version": "0.2.10-1build2"
          },
          {
            "binary_name": "toxcore-utils-dbgsym",
            "binary_version": "0.2.10-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libtoxcore",
        "purl": "pkg:deb/ubuntu/libtoxcore@0.2.10-1build2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.10-1build2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "details": "The TCP Server module in toxcore before 0.2.8 doesn\u0027t free the TCP priority queue under certain conditions, which allows a remote attacker to exhaust the system\u0027s memory, causing a denial of service (DoS).",
  "id": "UBUNTU-CVE-2018-25021",
  "modified": "2025-07-16T04:54:11Z",
  "published": "2021-12-13T01:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-25021"
    },
    {
      "type": "REPORT",
      "url": "https://blog.tox.chat/2018/10/memory-leak-bug-and-new-toxcore-release-fixing-it/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/TokTok/c-toxcore/issues/1214"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/TokTok/c-toxcore/pull/1216"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-25021"
    }
  ],
  "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-2018-25021"
  ],
  "withdrawn": "2025-07-18T16:44:52Z"
}



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Sightings

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Nomenclature

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.