ghsa-h3q4-6j7f-r24c
Vulnerability from github
Published
2022-05-17 03:02
Modified
2024-08-30 23:37
Severity ?
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.6 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Summary
priority vulnerable to denial of service
Details

A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targeted by a malicious peer by having that peer assign priority information for every possible HTTP/2 stream ID. The priority tree would happily continue to store the priority information for each stream, and would therefore allocate unbounded amounts of memory. Attempting to actually use a tree like this would also cause extremely high CPU usage to maintain the tree.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "priority"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2016-6580"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-08-30T23:37:23Z",
    "nvd_published_at": "2017-01-10T15:59:00Z",
    "severity": "MODERATE"
  },
  "details": "A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targeted by a malicious peer by having that peer assign priority information for every possible HTTP/2 stream ID. The priority tree would happily continue to store the priority information for each stream, and would therefore allocate unbounded amounts of memory. Attempting to actually use a tree like this would also cause extremely high CPU usage to maintain the tree.",
  "id": "GHSA-h3q4-6j7f-r24c",
  "modified": "2024-08-30T23:37:23Z",
  "published": "2022-05-17T03:02:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-6580"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-hyper/priority/commit/7d01a7dc4db83bce50f20d47caf4f37b403a3ecd"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/priority/PYSEC-2017-93.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-hyper/priority"
    },
    {
      "type": "WEB",
      "url": "https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20160806004329/http://www.securityfocus.com/bid/92311"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "priority vulnerable to denial of service"
}


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