GHSA-562C-5R94-XH97

Vulnerability from github – Published: 2018-08-23 19:10 – Updated: 2024-09-20 20:16
VLAI?
Summary
Flask is vulnerable to Denial of Service via incorrect encoding of JSON data
Details

The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding. This vulnerability appears to have been fixed in 0.12.3.

Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 (High)
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
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "Flask"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.12.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-1000656"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T21:00:05Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding. This vulnerability appears to have been fixed in 0.12.3.",
  "id": "GHSA-562c-5r94-xh97",
  "modified": "2024-09-20T20:16:29Z",
  "published": "2018-08-23T19:10:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000656"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/pull/2691"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/commit/b178e89e4456e777b1a7ac6d7199052d0dfdbbbe"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-562c-5r94-xh97"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pallets/flask"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/releases/tag/0.12.3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/flask/PYSEC-2018-66.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/08/msg00025.html"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20190221-0001"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4378-1"
    }
  ],
  "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"
    },
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Flask is vulnerable to Denial of Service via incorrect encoding of JSON data"
}


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  • 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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