pysec - pysec-2022-193

pysec-2022-193

Vulnerability from pysec

Published

2022-04-25 22:15

Modified

2022-05-17 23:28

Details

flask-session-captcha is a package which allows users to extend Flask by adding an image based captcha stored in a server side session. In versions prior to 1.2.1, he captcha.validate() function would return None if passed no value (e.g. by submitting an having an empty form). If implementing users were checking the return value to be False, the captcha verification check could be bypassed. Version 1.2.1 fixes the issue. Users can workaround the issue by not explicitly checking that the value is False. Checking the return value less explicitly should still work.

Impacted products

Name	purl
flask-session-captcha	pkg:pypi/flask-session-captcha

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "flask-session-captcha",
        "purl": "pkg:pypi/flask-session-captcha"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2811ae23a38d33b620fb7a07de8837c6d65c13e4"
            }
          ],
          "repo": "https://github.com/Tethik/flask-session-captcha",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0",
        "1.0.1",
        "1.0.2",
        "1.0.3",
        "1.1.0",
        "1.2.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2022-24880",
    "GHSA-7r87-cj48-wj45"
  ],
  "details": "flask-session-captcha is a package which allows users to extend Flask by adding an image based captcha stored in a server side session. In versions prior to 1.2.1, he `captcha.validate()` function would return `None` if passed no value (e.g. by submitting an having an empty form). If implementing users were checking the return value to be **False**, the captcha verification check could be bypassed. Version 1.2.1 fixes the issue. Users can workaround the issue by not explicitly checking that the value is False. Checking the return value less explicitly should still work.",
  "id": "PYSEC-2022-193",
  "modified": "2022-05-17T23:28:25.264091Z",
  "published": "2022-04-25T22:15:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Tethik/flask-session-captcha/releases/tag/v1.2.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Tethik/flask-session-captcha/pull/27"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Tethik/flask-session-captcha/commit/2811ae23a38d33b620fb7a07de8837c6d65c13e4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Tethik/flask-session-captcha/security/advisories/GHSA-7r87-cj48-wj45"
    }
  ]
}

ghsa-7r87-cj48-wj45

Vulnerability from github

Published

2022-04-26 21:19

Modified

2024-09-20 21:03

Severity ?

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
6.9 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Summary

Potential Captcha Validate Bypass in flask-session-captcha

Details

Impact

flask-session-captcha is a package which allows users to extend Flask by adding an image based captcha stored in a server side session.

The captcha.validate() function would return None if passed no value (e.g. by submitting a request with an empty form).

If implementing users were checking the return value to be False, the captcha verification check could be bypassed.

Sample vulnerable code: python if captcha.validate() == False: ... # abort else: ... # do stuff

Patches

A new version (1.2.1) is available that fixes the issue.

Workarounds

Users can workaround the issue by not explicitly checking that the value is False.

Checking the return value less explicitly should still work.

python if not captcha.validate(): ... # abort else: ... # do stuff

python if captcha.validate(): ... # do stuff else: ... # abort

References

https://github.com/Tethik/flask-session-captcha/pull/27

For more information

If you have any questions or comments about this advisory: * Open an issue in the github repo

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "flask-session-captcha"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-24880"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-253",
      "CWE-394",
      "CWE-754"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-04-26T21:19:52Z",
    "nvd_published_at": "2022-04-25T22:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nflask-session-captcha is a package which allows users to extend Flask by adding an image based captcha stored in a server side session.\n\nThe `captcha.validate()` function would return `None` if passed no value (e.g. by submitting a request with an empty form).\n\nIf implementing users were checking the return value to be **False**, the captcha verification check could be bypassed.\n\nSample vulnerable code:\n```python\nif captcha.validate() == False:\n    ... # abort\nelse:\n   ... # do stuff\n```\n\n### Patches\nA new version (1.2.1) is available that fixes the issue.\n\n### Workarounds\nUsers can workaround the issue by not explicitly checking that the value is False. \n\nChecking the return value less explicitly should still work. \n\n```python\nif not captcha.validate():\n    ... # abort\nelse:\n   ... # do stuff\n```\n\n```python\nif captcha.validate():\n    ... # do stuff\nelse:\n   ... # abort\n```\n\n### References\nhttps://github.com/Tethik/flask-session-captcha/pull/27\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the github repo](https://github.com/Tethik/flask-session-captcha)\n",
  "id": "GHSA-7r87-cj48-wj45",
  "modified": "2024-09-20T21:03:06Z",
  "published": "2022-04-26T21:19:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Tethik/flask-session-captcha/security/advisories/GHSA-7r87-cj48-wj45"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-24880"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Tethik/flask-session-captcha/pull/27"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Tethik/flask-session-captcha/commit/2811ae23a38d33b620fb7a07de8837c6d65c13e4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Tethik/flask-session-captcha"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Tethik/flask-session-captcha/releases/tag/v1.2.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/flask-session-captcha/PYSEC-2022-193.yaml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Potential Captcha Validate Bypass in flask-session-captcha"
}

CVE-2022-24880 (GCVE-0-2022-24880)

Vulnerability from cvelistv5

Published

2022-04-25 22:10

Modified

2025-04-23 18:32

Severity ?

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE

CWE-253 - Incorrect Check of Function Return Value
CWE-394 - Unexpected Status Code or Return Value
CWE-754 - Improper Check for Unusual or Exceptional Conditions

Summary

flask-session-captcha is a package which allows users to extend Flask by adding an image based captcha stored in a server side session. In versions prior to 1.2.1, he `captcha.validate()` function would return `None` if passed no value (e.g. by submitting an having an empty form). If implementing users were checking the return value to be **False**, the captcha verification check could be bypassed. Version 1.2.1 fixes the issue. Users can workaround the issue by not explicitly checking that the value is False. Checking the return value less explicitly should still work.

References

►

URL

Tags

	https://github.com/Tethik/flask-session-captcha/security/advisories/GHSA-7r87-cj48-wj45	x_refsource_CONFIRM
	https://github.com/Tethik/flask-session-captcha/pull/27	x_refsource_MISC
	https://github.com/Tethik/flask-session-captcha/commit/2811ae23a38d33b620fb7a07de8837c6d65c13e4	x_refsource_MISC
	https://github.com/Tethik/flask-session-captcha/releases/tag/v1.2.1	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	Tethik	flask-session-captcha	Version: < 1.2.1

Show details on NVD website

JSON

To clipboard

{
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            "url": "https://github.com/Tethik/flask-session-captcha/security/advisories/GHSA-7r87-cj48-wj45"
          },
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            "url": "https://github.com/Tethik/flask-session-captcha/commit/2811ae23a38d33b620fb7a07de8837c6d65c13e4"
          },
          {
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            ],
            "url": "https://github.com/Tethik/flask-session-captcha/releases/tag/v1.2.1"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
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                "options": [
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                "role": "CISA Coordinator",
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

pysec-2022-193

Vulnerability from pysec

ghsa-7r87-cj48-wj45

Vulnerability from github

Impact

Patches

Workarounds

References

For more information

CVE-2022-24880 (GCVE-0-2022-24880)

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature