{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-25193",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-11T15:22:08.933112Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-11T15:22:12.545Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/netty/netty/security/advisories/GHSA-389x-839f-4rhx"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-02-21T18:03:38.211Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://security.netapp.com/advisory/ntap-20250221-0006/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "netty",
          "vendor": "netty",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 4.1.118"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Netty, an asynchronous, event-driven network application framework, has a vulnerability in versions up to and including 4.1.118.Final. An unsafe reading of environment file could potentially cause a denial of service in Netty. When loaded on an Windows application, Netty attempts to load a file that does not exist. If an attacker creates such a large file, the Netty application crash. A similar issue was previously reported as CVE-2024-47535. This issue was fixed, but the fix was incomplete in that null-bytes were not counted against the input limit. Commit d1fbda62d3a47835d3fb35db8bd42ecc205a5386 contains an updated fix."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-02-10T22:02:17.197Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/netty/netty/security/advisories/GHSA-389x-839f-4rhx",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/netty/netty/security/advisories/GHSA-389x-839f-4rhx"
        },
        {
          "name": "https://github.com/netty/netty/commit/d1fbda62d3a47835d3fb35db8bd42ecc205a5386",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/netty/netty/commit/d1fbda62d3a47835d3fb35db8bd42ecc205a5386"
        }
      ],
      "source": {
        "advisory": "GHSA-389x-839f-4rhx",
        "discovery": "UNKNOWN"
      },
      "title": "Denial of Service attack on windows app using Netty"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-25193",
    "datePublished": "2025-02-10T22:02:17.197Z",
    "dateReserved": "2025-02-03T19:30:53.400Z",
    "dateUpdated": "2025-02-21T18:03:38.211Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.1.114.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-common"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.115.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-47535"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-11-12T19:53:17Z",
    "nvd_published_at": "2024-11-12T16:15:22Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nAn unsafe reading of environment file could potentially cause a denial of service in Netty.\nWhen loaded on an Windows application, Netty attemps to load a file that does not exist. If an attacker creates such a large file, the Netty application crash.\n\n\n### Details\n\nWhen the library netty is loaded in a java windows application, the library tries to identify the system environnement in which it is executed.\n\nAt this stage, Netty tries to load both `/etc/os-release` and `/usr/lib/os-release` even though it is in a Windows environment. \n\n\u003cimg width=\"364\" alt=\"1\" src=\"https://github.com/user-attachments/assets/9466b181-9394-45a3-b0e3-1dcf105def59\"\u003e\n\nIf netty finds this files, it reads them and loads them into memory.\n\nBy default :\n\n- The JVM maximum memory size is set to 1 GB,\n- A non-privileged user can create a directory at `C:\\` and create files within it.\n\n\u003cimg width=\"340\" alt=\"2\" src=\"https://github.com/user-attachments/assets/43b359a2-5871-4592-ae2b-ffc40ac76831\"\u003e\n\n\u003cimg width=\"523\" alt=\"3\" src=\"https://github.com/user-attachments/assets/ad5c6eed-451c-4513-92d5-ba0eee7715c1\"\u003e\n\nthe source code identified :\nhttps://github.com/netty/netty/blob/4.1/common/src/main/java/io/netty/util/internal/PlatformDependent.java\n\nDespite the implementation of the function `normalizeOs()` the source code not verify the OS before reading `C:\\etc\\os-release` and `C:\\usr\\lib\\os-release`.\n\n### PoC\n\nCreate a file larger than 1 GB of data in `C:\\etc\\os-release` or `C:\\usr\\lib\\os-release` on a Windows environnement and start your Netty application.\n\nTo observe what the application does with the file, the security analyst used \"Process Monitor\" from the \"Windows SysInternals\" suite. (https://learn.microsoft.com/en-us/sysinternals/)\n\n```\ncd C:\\etc\nfsutil file createnew os-release 3000000000\n```\n\n\u003cimg width=\"519\" alt=\"4\" src=\"https://github.com/user-attachments/assets/39df22a3-462b-4fd0-af9a-aa30077ec08f\"\u003e\n\n\u003cimg width=\"517\" alt=\"5\" src=\"https://github.com/user-attachments/assets/129dbd50-fc36-4da5-8eb1-582123fb528f\"\u003e\n\nThe source code used is the Netty website code example : [Echo \u2010 the very basic client and server](https://netty.io/4.1/xref/io/netty/example/echo/package-summary.html).\n\nThe vulnerability was tested on the 4.1.112.Final version.\n\nThe security analyst tried the same technique for `C:\\proc\\sys\\net\\core\\somaxconn` with a lot of values to impact Netty but the only things that works is the \"larger than 1 GB file\" technique. https://github.com/netty/netty/blob/c0fdb8e9f8f256990e902fcfffbbe10754d0f3dd/common/src/main/java/io/netty/util/NetUtil.java#L186\n\n### Impact\n\nBy loading the \"file larger than 1 GB\" into the memory, the Netty library exceeds the JVM memory limit and causes a crash in the java Windows application.\n\nThis behaviour occurs 100% of the time in both Server mode and Client mode if the large file exists.\n\nClient mode :\n\n\u003cimg width=\"449\" alt=\"6\" src=\"https://github.com/user-attachments/assets/f8fe1ed0-1a42-4490-b9ed-dbc9af7804be\"\u003e\n\nServer mode :\n\n\u003cimg width=\"464\" alt=\"7\" src=\"https://github.com/user-attachments/assets/b34b42bd-4fbd-4170-b93a-d29ba87b88eb\"\u003e\n\nsomaxconn :\n\n\u003cimg width=\"532\" alt=\"8\" src=\"https://github.com/user-attachments/assets/0656b3bb-32c6-4ae2-bff7-d93babba08a3\"\u003e\n\n### Severity\n\n- Attack vector : \"Local\" because the attacker needs to be on the system where the Netty application is running.\n- Attack complexity : \"Low\" because the attacker only need to create a massive file (regardless of its contents).\n- Privileges required : \"Low\" because the attacker requires a user account to exploit the vulnerability.\n- User intercation : \"None\" because the administrator don\u0027t need to accidentally click anywhere to trigger the vulnerability. Furthermore, the exploitation works with defaults windows/AD settings.\n- Scope : \"Unchanged\" because only Netty is affected by the vulnerability.\n- Confidentiality : \"None\" because no data is exposed through exploiting the vulnerability.\n- Integrity : \"None\" because the explotation of the vulnerability does not allow editing, deleting or adding data elsewhere.\n- Availability : \"High\" because the exploitation of this vulnerability crashes the entire java application.",
  "id": "GHSA-xq3w-v528-46rv",
  "modified": "2025-02-18T15:57:45Z",
  "published": "2024-11-12T19:53:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/security/advisories/GHSA-xq3w-v528-46rv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47535"
    },
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/commit/fbf7a704a82e7449b48bd0bbb679f5661c6d61a3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/netty/netty"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Denial of Service attack on windows app using netty"
}