ghsa-hr7v-m862-8hh8
Vulnerability from github
Published
2022-05-24 22:01
Modified
2025-11-04 00:30
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-3737"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-03-04T19:15:00Z",
    "severity": "LOW"
  },
  "details": "A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.",
  "id": "GHSA-hr7v-m862-8hh8",
  "modified": "2025-11-04T00:30:31Z",
  "published": "2022-05-24T22:01:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3737"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/25916"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/26503"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/ea9327036680acc92d9f89eaf6f6a54d2f8d78d9"
    },
    {
      "type": "WEB",
      "url": "https://bugs.python.org/issue44022"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1995162"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python/cpython"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00024.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html"
    },
    {
      "type": "WEB",
      "url": "https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20220407-0009"
    },
    {
      "type": "WEB",
      "url": "https://ubuntu.com/security/CVE-2021-3737"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpujul2022.html"
    }
  ],
  "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"
    }
  ]
}


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