pysec - pysec-2023-62

pysec-2023-62

Vulnerability from pysec

Published

2023-05-02 18:15

Modified

2023-06-05 01:12

Details

Flask is a lightweight WSGI web application framework. When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by the proxy to other clients. If the proxy also caches Set-Cookie headers, it may send one client's session cookie to other clients. The severity depends on the application's use of the session and the proxy's behavior regarding cookies. The risk depends on all these conditions being met.

The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies.
The application sets session.permanent = True
The application does not access or modify the session at any point during a request.
SESSION_REFRESH_EACH_REQUEST enabled (the default).
The application does not set a Cache-Control header to indicate that a page is private or should not be cached.

This happens because vulnerable versions of Flask only set the Vary: Cookie header when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified. This issue has been fixed in versions 2.3.2 and 2.2.5.

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "flask",
        "purl": "pkg:pypi/flask"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "70f906c51ce49c485f1d355703e9cc3386b1cc2b"
            },
            {
              "fixed": "afd63b16170b7c047f5758eb910c416511e9c965"
            }
          ],
          "repo": "https://github.com/pallets/flask",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.5"
            },
            {
              "introduced": "2.3.0"
            },
            {
              "fixed": "2.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1",
        "0.10",
        "0.10.1",
        "0.11",
        "0.11.1",
        "0.12",
        "0.12.1",
        "0.12.2",
        "0.12.3",
        "0.12.4",
        "0.12.5",
        "0.2",
        "0.3",
        "0.3.1",
        "0.4",
        "0.5",
        "0.5.1",
        "0.5.2",
        "0.6",
        "0.6.1",
        "0.7",
        "0.7.1",
        "0.7.2",
        "0.8",
        "0.8.1",
        "0.9",
        "1.0",
        "1.0.1",
        "1.0.2",
        "1.0.3",
        "1.0.4",
        "1.1.0",
        "1.1.1",
        "1.1.2",
        "1.1.3",
        "1.1.4",
        "2.0.0",
        "2.0.0rc1",
        "2.0.0rc2",
        "2.0.1",
        "2.0.2",
        "2.0.3",
        "2.1.0",
        "2.1.1",
        "2.1.2",
        "2.1.3",
        "2.2.0",
        "2.2.1",
        "2.2.2",
        "2.2.3",
        "2.2.4",
        "2.3.0",
        "2.3.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2023-30861",
    "GHSA-m2qf-hxjv-5gpq"
  ],
  "details": "Flask is a lightweight WSGI web application framework. When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by the proxy to other clients. If the proxy also caches `Set-Cookie` headers, it may send one client\u0027s `session` cookie to other clients. The severity depends on the application\u0027s use of the session and the proxy\u0027s behavior regarding cookies. The risk depends on all these conditions being met.\n\n1. The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies.\n2. The application sets `session.permanent = True`\n3. The application does not access or modify the session at any point during a request.\n4. `SESSION_REFRESH_EACH_REQUEST` enabled (the default).\n5. The application does not set a `Cache-Control` header to indicate that a page is private or should not be cached.\n\nThis happens because vulnerable versions of Flask only set the `Vary: Cookie` header when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified. This issue has been fixed in versions 2.3.2 and 2.2.5.",
  "id": "PYSEC-2023-62",
  "modified": "2023-06-05T01:12:52.229549Z",
  "published": "2023-05-02T18:15:00Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/releases/tag/2.3.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/releases/tag/2.2.5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965"
    }
  ]
}

cve-2023-30861

Vulnerability from cvelistv5

Published

2023-05-02 17:04

Modified

2024-08-02 14:37

Severity

7.5 (High) - cvssV3_1 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

Flask vulnerable to possible disclosure of permanent session cookie due to missing Vary: Cookie header

References

URL	Tags
https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq	x_refsource_CONFIRM
https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b	x_refsource_MISC
https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965	x_refsource_MISC
https://github.com/pallets/flask/releases/tag/2.2.5	x_refsource_MISC
https://github.com/pallets/flask/releases/tag/2.3.2	x_refsource_MISC
https://www.debian.org/security/2023/dsa-5442
https://security.netapp.com/advisory/ntap-20230818-0006/
https://lists.debian.org/debian-lts-announce/2023/08/msg00024.html

Impacted products

Vendor	Product
pallets	flask

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T14:37:15.503Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq"
          },
          {
            "name": "https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b"
          },
          {
            "name": "https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965"
          },
          {
            "name": "https://github.com/pallets/flask/releases/tag/2.2.5",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/pallets/flask/releases/tag/2.2.5"
          },
          {
            "name": "https://github.com/pallets/flask/releases/tag/2.3.2",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/pallets/flask/releases/tag/2.3.2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2023/dsa-5442"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20230818-0006/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00024.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "flask",
          "vendor": "pallets",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.3.0, \u003c 2.3.2"
            },
            {
              "status": "affected",
              "version": "\u003c 2.2.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Flask is a lightweight WSGI web application framework. When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by the proxy to other clients. If the proxy also caches `Set-Cookie` headers, it may send one client\u0027s `session` cookie to other clients. The severity depends on the application\u0027s use of the session and the proxy\u0027s behavior regarding cookies. The risk depends on all these conditions being met.\n\n1. The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies.\n2. The application sets `session.permanent = True`\n3. The application does not access or modify the session at any point during a request.\n4. `SESSION_REFRESH_EACH_REQUEST` enabled (the default).\n5. The application does not set a `Cache-Control` header to indicate that a page is private or should not be cached.\n\nThis happens because vulnerable versions of Flask only set the `Vary: Cookie` header when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified. This issue has been fixed in versions 2.3.2 and 2.2.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-539",
              "description": "CWE-539: Use of Persistent Cookies Containing Sensitive Information",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-05-02T17:04:22.197Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq"
        },
        {
          "name": "https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b"
        },
        {
          "name": "https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965"
        },
        {
          "name": "https://github.com/pallets/flask/releases/tag/2.2.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pallets/flask/releases/tag/2.2.5"
        },
        {
          "name": "https://github.com/pallets/flask/releases/tag/2.3.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pallets/flask/releases/tag/2.3.2"
        },
        {
          "url": "https://www.debian.org/security/2023/dsa-5442"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20230818-0006/"
        },
        {
          "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00024.html"
        }
      ],
      "source": {
        "advisory": "GHSA-m2qf-hxjv-5gpq",
        "discovery": "UNKNOWN"
      },
      "title": "Flask vulnerable to possible disclosure of permanent session cookie due to missing Vary: Cookie header"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-30861",
    "datePublished": "2023-05-02T17:04:22.197Z",
    "dateReserved": "2023-04-18T16:13:15.882Z",
    "dateUpdated": "2024-08-02T14:37:15.503Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

ghsa-m2qf-hxjv-5gpq

Vulnerability from github

Published

2023-05-01 19:22

Modified

2023-05-01 19:22

Severity

7.5 (High) - CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

Flask vulnerable to possible disclosure of permanent session cookie due to missing Vary: Cookie header

Details

When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by a proxy to other clients. If the proxy also caches Set-Cookie headers, it may send one client's session cookie to other clients. The severity depends on the application's use of the session, and the proxy's behavior regarding cookies. The risk depends on all these conditions being met.

The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies.
The application sets session.permanent = True.
The application does not access or modify the session at any point during a request.
SESSION_REFRESH_EACH_REQUEST is enabled (the default).
The application does not set a Cache-Control header to indicate that a page is private or should not be cached.

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "affected_functions": [
          "flask.sessions.SecureCookieSessionInterface.save_session"
        ]
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "flask"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.3.0"
            },
            {
              "fixed": "2.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "affected_functions": [
          "flask.sessions.SecureCookieSessionInterface.save_session"
        ]
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "flask"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-30861"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-539"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-05-01T19:22:20Z",
    "nvd_published_at": "2023-05-02T18:15:52Z",
    "severity": "HIGH"
  },
  "details": "When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by a proxy to other clients. If the proxy also caches `Set-Cookie` headers, it may send one client\u0027s `session` cookie to other clients. The severity depends on the application\u0027s use of the session, and the proxy\u0027s behavior regarding cookies. The risk depends on _all_ these conditions being met.\n\n1. The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies.\n2. The application sets [`session.permanent = True`](https://flask.palletsprojects.com/en/2.3.x/api/#flask.session.permanent).\n2. The application does not access or modify the session at any point during a request.\n4. [`SESSION_REFRESH_EACH_REQUEST`](https://flask.palletsprojects.com/en/2.3.x/config/#SESSION_REFRESH_EACH_REQUEST) is enabled (the default).\n5. The application does not set a `Cache-Control` header to indicate that a page is private or should not be cached.\n\nThis happens because vulnerable versions of Flask only set the `Vary: Cookie` header when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified.",
  "id": "GHSA-m2qf-hxjv-5gpq",
  "modified": "2023-05-01T19:22:20Z",
  "published": "2023-05-01T19:22:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-30861"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pallets/flask"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/releases/tag/2.2.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/flask/releases/tag/2.3.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/flask/PYSEC-2023-62.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00024.html"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20230818-0006"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5442"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Flask vulnerable to possible disclosure of permanent session cookie due to missing Vary: Cookie header"
}

Action not permitted

pysec-2023-62

Vulnerability from pysec

cve-2023-30861

Vulnerability from cvelistv5

ghsa-m2qf-hxjv-5gpq

Vulnerability from github

Tags