hsec-2023-0004
Vulnerability from osv_haskell
Published
2025-11-14 14:45
Modified
2025-11-14 14:45
Summary
xml-conduit unbounded entity expansion
Details

xml-conduit unbounded entity expansion

A vulnerability was found in xml-conduit. It has been classified as problematic. Affected is an unknown function of the file xml-conduit/src/Text/XML/Stream/Parse.hs of the component DOCTYPE Entity Expansion Handler. The manipulation leads to infinite loop. It is possible to launch the attack remotely. Upgrading to version 1.9.1.0 is able to address this issue. The name of the patch is 4be1021791dcdee8b164d239433a2043dc0939ea. It is recommended to upgrade the affected component.


{
  "affected": [
    {
      "database_specific": {
        "human_link": "https://github.com/haskell/security-advisories/tree/main/advisories/published/2023/HSEC-2023-0004.md",
        "osv": "https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export/2023/HSEC-2023-0004.json"
      },
      "package": {
        "ecosystem": "Hackage",
        "name": "xml-conduit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.5.0"
            },
            {
              "fixed": "1.9.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-4249",
    "VDB-216204"
  ],
  "database_specific": {
    "home": "https://github.com/haskell/security-advisories",
    "osvs": "https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export",
    "repository": "https://github.com/haskell/security-advisories"
  },
  "details": "# xml-conduit unbounded entity expansion\n\nA vulnerability was found in *xml-conduit*. It has been classified\nas problematic.  Affected is an unknown function of the file\n`xml-conduit/src/Text/XML/Stream/Parse.hs` of the component DOCTYPE\nEntity Expansion Handler. The manipulation leads to infinite loop.\nIt is possible to launch the attack remotely. Upgrading to version\n1.9.1.0 is able to address this issue. The name of the patch is\n`4be1021791dcdee8b164d239433a2043dc0939ea`. It is recommended to\nupgrade the affected component.\n",
  "id": "HSEC-2023-0004",
  "modified": "2025-11-14T14:45:34Z",
  "published": "2025-11-14T14:45:34Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/snoyberg/xml/pull/161"
    },
    {
      "type": "FIX",
      "url": "https://github.com/snoyberg/xml/commit/4be1021791dcdee8b164d239433a2043dc0939ea"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "xml-conduit unbounded entity expansion"
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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