pysec - pysec-2022-259

PYSEC-2022-259

Vulnerability from pysec - Published: 2022-09-01 18:51 - Updated: 2022-09-05 01:24

Details

An attacker who obtains a JWT can arbitrarily forge its contents without knowing the secret key. Depending on the application, this may for example enable the attacker to spoof other user's identities, hijack their sessions, or bypass authentication.

Impacted products

Name	purl
python-jwt	pkg:pypi/python-jwt

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "python-jwt",
        "purl": "pkg:pypi/python-jwt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "f6d1451012c6a04c2fb1940f0bbd93bb6cf2b025"
            },
            {
              "fixed": "88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9"
            }
          ],
          "repo": "https://github.com/davedoesdev/python-jwt",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.3.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.0",
        "3.1.0",
        "3.2.0",
        "3.2.1",
        "3.2.2",
        "3.2.3",
        "3.2.4",
        "3.2.5",
        "3.2.6",
        "3.3.0",
        "3.3.1",
        "3.3.2",
        "3.3.3",
        "3.0.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2022-39227",
    "GHSA-5p8v-58qm-c7fp"
  ],
  "details": "An attacker who obtains a JWT can arbitrarily forge its contents without knowing the secret key. Depending on the application, this may for example enable the attacker to spoof other user\u0027s identities, hijack their sessions, or bypass authentication.",
  "id": "PYSEC-2022-259",
  "modified": "2022-09-05T01:24:44.773501Z",
  "published": "2022-09-01T18:51:51Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9"
    }
  ]
}

GHSA-5P8V-58QM-C7FP

Vulnerability from github – Published: 2022-09-21 21:33 – Updated: 2024-07-10 21:32

Summary

python-jwt vulnerable to token forgery with new claims

Details

Impact

Patches

Users should upgrade to version 3.3.4 Fixed by: https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9

Workarounds

None

References

Found by Tom Tervoort https://github.com/pypa/advisory-database/blob/main/vulns/python-jwt/PYSEC-2022-259.yaml

More information

The vulnerability allows an attacker, who possesses a single valid JWT, to create a new token with forged claims that the verify_jwt function will accept as valid.

The issue is caused by an inconsistency between the JWT parsers used by python-jwt and its dependency jwcrypto. By mixing compact and JSON representations, an attacker can trick jwcrypto of parsing different claims than those over which a signature is validated by jwcrypto.

Testing the fix has been added as an automated unit test to python-jwt.

If you have any questions or comments about this advisory, please open an issue in python-jwt

Severity ?

9.1 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "python-jwt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-39227"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-290"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-09-21T21:33:22Z",
    "nvd_published_at": "2022-09-23T07:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\nAn attacker who obtains a JWT can arbitrarily forge its contents without knowing the secret key. Depending on the application, this may for example enable the attacker to spoof other user\u0027s identities, hijack their sessions, or bypass authentication.\n\n### Patches\nUsers should upgrade to version 3.3.4\nFixed by: https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9\n\n### Workarounds\nNone\n\n### References\nFound by [Tom Tervoort](Tom.Tervoort@secura.com)\nhttps://github.com/pypa/advisory-database/blob/main/vulns/python-jwt/PYSEC-2022-259.yaml\n\n### More information\n\nThe vulnerability allows an attacker, who possesses a single valid JWT, to create a new token with forged claims that the verify_jwt function will accept as valid.\n\nThe issue is caused by an inconsistency between the JWT parsers used by python-jwt and its dependency jwcrypto. By mixing compact and JSON representations, an attacker can trick jwcrypto of parsing different claims than those over which a signature is validated by jwcrypto.\n\nTesting the fix has been added as an [automated unit test](https://github.com/davedoesdev/python-jwt/blob/master/test/vulnerability_vows.py) to python-jwt.\n\nIf you have any questions or comments about this advisory, please open an issue in [python-jwt](https://github.com/davedoesdev/python-jwt)\n",
  "id": "GHSA-5p8v-58qm-c7fp",
  "modified": "2024-07-10T21:32:14Z",
  "published": "2022-09-21T21:33:22Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/davedoesdev/python-jwt/security/advisories/GHSA-5p8v-58qm-c7fp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-39227"
    },
    {
      "type": "WEB",
      "url": "https://github.com/davedoesdev/python-jwt/commit/6c5075469847b9e8b6e5336077d989d77a4d2bf1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/davedoesdev/python-jwt"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/blob/main/vulns/python-jwt/PYSEC-2022-259.yaml"
    },
    {
      "type": "WEB",
      "url": "https://www.vicarius.io/vsociety/posts/authentication-bypass-in-python-jwt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "python-jwt vulnerable to token forgery with new claims"
}

CVE-2022-39227 (GCVE-0-2022-39227)

Vulnerability from cvelistv5 – Published: 2022-09-23 06:55 – Updated: 2024-08-03 12:00

Title

Python-jwt subject to Authentication Bypass by Spoofing

Summary

python-jwt is a module for generating and verifying JSON Web Tokens. Versions prior to 3.3.4 are subject to Authentication Bypass by Spoofing, resulting in identity spoofing, session hijacking or authentication bypass. An attacker who obtains a JWT can arbitrarily forge its contents without knowing the secret key. Depending on the application, this may for example enable the attacker to spoof other user's identities, hijack their sessions, or bypass authentication. Users should upgrade to version 3.3.4. There are no known workarounds.

Severity ?

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

GitHub_M

References

URL

Tags

	https://github.com/davedoesdev/python-jwt/securit…
	https://github.com/davedoesdev/python-jwt/commit/…
	https://github.com/pypa/advisory-database/blob/ma…
	https://www.vicarius.io/vsociety/posts/authentica…

Impacted products

	Vendor	Product	Version
	davedoesdev	python-jwt	Affected: < 3.3.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-39227",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-07-10T20:53:18.535735Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-10T20:53:34.449Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T12:00:43.537Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/davedoesdev/python-jwt/security/advisories/GHSA-5p8v-58qm-c7fp"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/pypa/advisory-database/blob/main/vulns/python-jwt/PYSEC-2022-259.yaml"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.vicarius.io/vsociety/posts/authentication-bypass-in-python-jwt"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "python-jwt",
          "vendor": "davedoesdev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.3.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "python-jwt is a module for generating and verifying JSON Web Tokens. Versions prior to 3.3.4 are subject to Authentication Bypass by Spoofing, resulting in identity spoofing, session hijacking or authentication bypass. An attacker who obtains a JWT can arbitrarily forge its contents without knowing the secret key. Depending on the application, this may for example enable the attacker to spoof other user\u0027s identities, hijack their sessions, or bypass authentication. Users should upgrade to version 3.3.4. There are no known workarounds."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-290",
              "description": "CWE-290: Authentication Bypass by Spoofing",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-07-10T20:13:44.143775",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "url": "https://github.com/davedoesdev/python-jwt/security/advisories/GHSA-5p8v-58qm-c7fp"
        },
        {
          "url": "https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9"
        },
        {
          "url": "https://github.com/pypa/advisory-database/blob/main/vulns/python-jwt/PYSEC-2022-259.yaml"
        },
        {
          "url": "https://www.vicarius.io/vsociety/posts/authentication-bypass-in-python-jwt"
        }
      ],
      "source": {
        "advisory": "GHSA-5p8v-58qm-c7fp",
        "discovery": "UNKNOWN"
      },
      "title": "Python-jwt subject to Authentication Bypass by Spoofing"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2022-39227",
    "datePublished": "2022-09-23T06:55:09",
    "dateReserved": "2022-09-02T00:00:00",
    "dateUpdated": "2024-08-03T12:00:43.537Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

PYSEC-2022-259

GHSA-5P8V-58QM-C7FP

Impact

Patches

Workarounds

References

More information

CVE-2022-39227 (GCVE-0-2022-39227)

Tags

Sightings

Nomenclature