PYSEC-2021-66

Vulnerability from pysec - Published: 2021-02-01 20:15 - Updated: 2021-03-22 16:34
VLAI?
Details

This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the _punctuation_re regex operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.

Impacted products
Name purl
jinja2 pkg:pypi/jinja2
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "jinja2",
        "purl": "pkg:pypi/jinja2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.11.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0rc1",
        "2.0",
        "2.1",
        "2.1.1",
        "2.2",
        "2.2.1",
        "2.3",
        "2.3.1",
        "2.4",
        "2.4.1",
        "2.5",
        "2.5.1",
        "2.5.2",
        "2.5.3",
        "2.5.4",
        "2.5.5",
        "2.6",
        "2.7",
        "2.7.1",
        "2.7.2",
        "2.7.3",
        "2.8",
        "2.8.1",
        "2.9",
        "2.9.1",
        "2.9.2",
        "2.9.3",
        "2.9.4",
        "2.9.5",
        "2.9.6",
        "2.10",
        "2.10.1",
        "2.10.2",
        "2.10.3",
        "2.11.0",
        "2.11.1",
        "2.11.2"
      ]
    }
  ],
  "aliases": [
    "CVE-2020-28493",
    "SNYK-PYTHON-JINJA2-1012994",
    "GHSA-g3rq-g295-4j3m"
  ],
  "details": "This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.",
  "id": "PYSEC-2021-66",
  "modified": "2021-03-22T16:34:00Z",
  "published": "2021-02-01T20:15:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/jinja/pull/1343"
    },
    {
      "type": "ADVISORY",
      "url": "https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-g3rq-g295-4j3m"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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