Описание
OAuthLib vulnerable to DoS when attacker provides malicious IPV6 URI
Impact
- Attacker providing malicious redirect uri can cause DoS to oauthlib's web application.
- Attacker can also leverage usage of
uri_validatefunctions 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_validatefunctions: https://github.com/oauthlib/oauthlib/blob/2b8a44855a51ad5a5b0c348a08c2564a2e197ea2/oauthlib/uri_validate.py
PoC
Acknowledgement
Special thanks to Sebastian Chnelik - PyUp.io
Ссылки
- https://github.com/oauthlib/oauthlib/security/advisories/GHSA-3pgj-pg6c-r5p7
- https://nvd.nist.gov/vuln/detail/CVE-2022-36087
- https://github.com/oauthlib/oauthlib/commit/2e40b412c844ecc4673c3fa3f72181f228bdbacd
- https://github.com/oauthlib/oauthlib/blob/2b8a44855a51ad5a5b0c348a08c2564a2e197ea2/oauthlib/uri_validate.py
- https://github.com/oauthlib/oauthlib/blob/d4bafd9f1d0eba3766e933b1ac598cbbf37b8914/oauthlib/oauth2/rfc6749/grant_types/base.py#L232
- https://github.com/oauthlib/oauthlib/releases/tag/v3.2.1
- https://github.com/pypa/advisory-database/tree/main/vulns/oauthlib/PYSEC-2022-269.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LXOPIA6M57CFQPUT6HHSNXCTV6QA3UDI
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NBCQJR3ZF7FVNTJYRVPVSQEQRAYZIUHU
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRYLYHE5HWF6R2CRLJFUK4PILR47WXOE
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X2CQZM5CKOUM4GW2GTAPQEQFPITQ6F7S
Пакеты
oauthlib
>= 3.1.1, < 3.2.2
3.2.2
EPSS
6.9 Medium
CVSS4
5.7 Medium
CVSS3
CVE ID
Дефекты
Связанные уязвимости
OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. In OAuthLib versions 3.1.1 until 3.2.1, an attacker providing malicious redirect uri can cause denial of service. An attacker can also leverage usage of `uri_validate` functions depending where it is used. OAuthLib applications using OAuth2.0 provider support or use directly `uri_validate` are affected by this issue. Version 3.2.1 contains a patch. There are no known workarounds.
OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. In OAuthLib versions 3.1.1 until 3.2.1, an attacker providing malicious redirect uri can cause denial of service. An attacker can also leverage usage of `uri_validate` functions depending where it is used. OAuthLib applications using OAuth2.0 provider support or use directly `uri_validate` are affected by this issue. Version 3.2.1 contains a patch. There are no known workarounds.
OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. In OAuthLib versions 3.1.1 until 3.2.1, an attacker providing malicious redirect uri can cause denial of service. An attacker can also leverage usage of `uri_validate` functions depending where it is used. OAuthLib applications using OAuth2.0 provider support or use directly `uri_validate` are affected by this issue. Version 3.2.1 contains a patch. There are no known workarounds.
OAuthLib is an implementation of the OAuth request-signing logic for P ...
EPSS
6.9 Medium
CVSS4
5.7 Medium
CVSS3