ghsa-3pgj-pg6c-r5p7
Vulnerability from github
Published
2022-09-16 21:02
Modified
2024-10-07 16:52
Severity ?
5.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
6.9 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
OAuthLib vulnerable to DoS when attacker provides malicious IPV6 URI
Details

Impact

  • Attacker providing malicious redirect uri can cause DoS to oauthlib's web application.
  • Attacker can also leverage usage of uri_validate functions depending where it is used.

What kind of vulnerability is it? Who is impacted?

Oauthlib applications using OAuth2.0 provider support or use directly uri_validate function.

Patches

Has the problem been patched? What versions should users upgrade to?

Issue fixed in 3.2.2 release.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

The redirect_uri can be verified in web toolkit (i.e bottle-oauthlib, django-oauth-toolkit, ...) before oauthlib is called. A sample check if : is present to reject the request can prevent the DoS, assuming no port or IPv6 is fundamentally required.

References

Attack Vector: - Attacker providing malicious redirect uri: https://github.com/oauthlib/oauthlib/blob/d4bafd9f1d0eba3766e933b1ac598cbbf37b8914/oauthlib/oauth2/rfc6749/grant_types/base.py#L232 - Vulnerable uri_validate functions: https://github.com/oauthlib/oauthlib/blob/2b8a44855a51ad5a5b0c348a08c2564a2e197ea2/oauthlib/uri_validate.py

PoC

python is_absolute_uri("http://[:::::::::::::::::::::::::::::::::::::::]/path")

Acknowledgement

Special thanks to Sebastian Chnelik - PyUp.io

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "oauthlib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.1.1"
            },
            {
              "fixed": "3.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-36087"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-09-16T21:02:52Z",
    "nvd_published_at": "2022-09-09T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n- Attacker providing malicious redirect uri can cause DoS to oauthlib\u0027s web application.\n- Attacker can also leverage usage of `uri_validate` functions depending where it is used.\n\n_What kind of vulnerability is it? Who is impacted?_\n\nOauthlib applications using OAuth2.0 provider support or use directly `uri_validate` function.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nIssue fixed in 3.2.2 release.\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nThe `redirect_uri` can be verified in web toolkit (i.e `bottle-oauthlib`, `django-oauth-toolkit`, ...) before oauthlib is called. A sample check if `:` is present to reject the request can prevent the DoS, assuming no port or IPv6 is fundamentally required.\n\n### References\nAttack Vector:\n- Attacker providing malicious redirect uri:\nhttps://github.com/oauthlib/oauthlib/blob/d4bafd9f1d0eba3766e933b1ac598cbbf37b8914/oauthlib/oauth2/rfc6749/grant_types/base.py#L232\n- Vulnerable `uri_validate` functions:\nhttps://github.com/oauthlib/oauthlib/blob/2b8a44855a51ad5a5b0c348a08c2564a2e197ea2/oauthlib/uri_validate.py\n\n### PoC\n```python\nis_absolute_uri(\"http://[:::::::::::::::::::::::::::::::::::::::]/path\")\n```\n\n### Acknowledgement\nSpecial thanks to Sebastian Chnelik - PyUp.io",
  "id": "GHSA-3pgj-pg6c-r5p7",
  "modified": "2024-10-07T16:52:33Z",
  "published": "2022-09-16T21:02:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/oauthlib/oauthlib/security/advisories/GHSA-3pgj-pg6c-r5p7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-36087"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oauthlib/oauthlib/commit/2e40b412c844ecc4673c3fa3f72181f228bdbacd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/oauthlib/oauthlib"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oauthlib/oauthlib/blob/2b8a44855a51ad5a5b0c348a08c2564a2e197ea2/oauthlib/uri_validate.py"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oauthlib/oauthlib/blob/d4bafd9f1d0eba3766e933b1ac598cbbf37b8914/oauthlib/oauth2/rfc6749/grant_types/base.py#L232"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oauthlib/oauthlib/releases/tag/v3.2.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/oauthlib/PYSEC-2022-269.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LXOPIA6M57CFQPUT6HHSNXCTV6QA3UDI"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NBCQJR3ZF7FVNTJYRVPVSQEQRAYZIUHU"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRYLYHE5HWF6R2CRLJFUK4PILR47WXOE"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X2CQZM5CKOUM4GW2GTAPQEQFPITQ6F7S"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OAuthLib vulnerable to DoS when attacker provides malicious IPV6 URI"
}


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