GHSA-9Q94-V7CH-MXQW

Vulnerability from github – Published: 2021-08-02 17:35 – Updated: 2021-05-25 20:12
VLAI?
Summary
Insufficient Session Expiration and TOCTOU Race Condition in OPC FOundation UA .Net Standard
Details

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.

Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.4.358.30"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "OPCFoundation.NetStandard.Opc.Ua"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.359.31"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-8867"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-367",
      "CWE-613"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-25T20:12:12Z",
    "nvd_published_at": "2020-04-22T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.",
  "id": "GHSA-9q94-v7ch-mxqw",
  "modified": "2021-05-25T20:12:12Z",
  "published": "2021-08-02T17:35:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8867"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OPCFoundation/UA-.NETStandard/releases/tag/1.4.359.31"
    },
    {
      "type": "WEB",
      "url": "https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-20-536"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Insufficient Session Expiration and TOCTOU Race Condition in OPC FOundation UA .Net Standard"
}


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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.



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