ghsa-389x-839f-4rhx
Vulnerability from github
Published
2025-02-10 18:14
Modified
2025-03-19 14:51
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
Denial of Service attack on windows app using Netty
Details

Summary

An unsafe reading of environment file could potentially cause a denial of service in Netty. When 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.

Details

A similar issue was previously reported in https://github.com/netty/netty/security/advisories/GHSA-xq3w-v528-46rv This issue was fixed, but the fix was incomplete in that null-bytes were not counted against the input limit.

PoC

The PoC is the same as for https://github.com/netty/netty/security/advisories/GHSA-xq3w-v528-46rv with the detail that the file should only contain null-bytes; 0x00. When the null-bytes are encountered by the InputStreamReader, it will issue replacement characters in its charset decoding, which will fill up the line-buffer in the BufferedReader.readLine(), because the replacement character is not a line-break character.

Impact

Impact is the same as https://github.com/netty/netty/security/advisories/GHSA-xq3w-v528-46rv

Show details on source website

To clipboard 

{
   affected: [
      {
         package: {
            ecosystem: "Maven",
            name: "io.netty:netty-common",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "4.1.118.Final",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
   ],
   aliases: [
      "CVE-2025-25193",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-400",
      ],
      github_reviewed: true,
      github_reviewed_at: "2025-02-10T18:14:47Z",
      nvd_published_at: "2025-02-10T22:15:38Z",
      severity: "MODERATE",
   },
   details: "### Summary\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### Details\nA similar issue was previously reported in https://github.com/netty/netty/security/advisories/GHSA-xq3w-v528-46rv\nThis issue was fixed, but the fix was incomplete in that null-bytes were not counted against the input limit.\n\n\n### PoC\nThe PoC is the same as for https://github.com/netty/netty/security/advisories/GHSA-xq3w-v528-46rv with the detail that the file should only contain null-bytes; 0x00.\nWhen the null-bytes are encountered by the `InputStreamReader`, it will issue replacement characters in its charset decoding, which will fill up the line-buffer in the `BufferedReader.readLine()`, because the replacement character is not a line-break character.\n\n### Impact\nImpact is the same as https://github.com/netty/netty/security/advisories/GHSA-xq3w-v528-46rv",
   id: "GHSA-389x-839f-4rhx",
   modified: "2025-03-19T14:51:27Z",
   published: "2025-02-10T18:14:47Z",
   references: [
      {
         type: "WEB",
         url: "https://github.com/netty/netty/security/advisories/GHSA-389x-839f-4rhx",
      },
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2025-25193",
      },
      {
         type: "WEB",
         url: "https://github.com/netty/netty/commit/d1fbda62d3a47835d3fb35db8bd42ecc205a5386",
      },
      {
         type: "PACKAGE",
         url: "https://github.com/netty/netty",
      },
      {
         type: "WEB",
         url: "https://security.netapp.com/advisory/ntap-20250221-0006",
      },
   ],
   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",
      },
   ],
   summary: "Denial of Service attack on windows app using Netty",
}


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