ghsa-2f9x-5v75-3qv4
Vulnerability from github
Published
2019-01-04 17:50
Modified
2024-09-17 15:09
Severity ?
5.3 (Medium) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
2.7 (Low) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Summary
Django Denial-of-service possibility in truncatechars_html and truncatewords_html template filters
Details

An issue was discovered in Django 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "Django"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0"
            },
            {
              "fixed": "2.0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "Django"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.11"
            },
            {
              "fixed": "1.11.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "Django"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.8"
            },
            {
              "fixed": "1.8.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-7537"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-185"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T20:51:51Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in Django 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19. If django.utils.text.Truncator\u0027s chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.",
  "id": "GHSA-2f9x-5v75-3qv4",
  "modified": "2024-09-17T15:09:40Z",
  "published": "2019-01-04T17:50:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-7537"
    },
    {
      "type": "WEB",
      "url": "https://github.com/django/django/commit/94c5da1d17a6b0d378866c66b605102c19f7988c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/django/django/commit/a91436360b79a6ff995c3e5018bcc666dfaf1539"
    },
    {
      "type": "WEB",
      "url": "https://github.com/django/django/commit/d17974a287a6ea2e361daff88fcc004cbd6835fa"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2927"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:0265"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-2f9x-5v75-3qv4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/django/django"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2018-6.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3591-1"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2018/dsa-4161"
    },
    {
      "type": "WEB",
      "url": "https://www.djangoproject.com/weblog/2018/mar/06/security-releases"
    }
  ],
  "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:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Django Denial-of-service possibility in truncatechars_html and truncatewords_html template filters"
}


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