CVE-2024-39694 | BDVDB-2026-244240 Detail
DuendeSoftwareIdentityServer
Description#
Duende IdentityServer is an OpenID Connect and OAuth 2.x framework for ASP.NET Core. It is possible for an attacker to craft malicious Urls that certain functions in IdentityServer will incorrectly treat as local and trusted. If such a Url is returned as a redirect, some browsers will follow it to a third-party, untrusted site. Note: by itself, this vulnerability does **not** allow an attacker to obtain user credentials, authorization codes, access tokens, refresh tokens, or identity tokens. An attacker could however exploit this vulnerability as part of a phishing attack designed to steal user credentials. This vulnerability is fixed in 7.0.6, 6.3.10, 6.2.5, 6.1.8, and 6.0.5. Duende.IdentityServer 5.1 and earlier and all versions of IdentityServer4 are no longer supported and will not be receiving updates. If upgrading is not possible, use `IUrlHelper.IsLocalUrl` from ASP.NET Core to validate return Urls in user interface code in the IdentityServer host.
Impact#
Per CVSS v3.1: confidentiality impact low, integrity impact none, availability impact none. Attack vector: network.
Weaknesses#
- CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
References#
- https://github.com/DuendeSoftware/IdentityServer/security/advisories/GHSA-ff4q-64jc-gx98
- https://github.com/DuendeSoftware/IdentityServer/commit/269ca2171fe1e901c87f2f0797bbc7c230db87c6
- https://github.com/DuendeSoftware/IdentityServer/commit/765116a2d4fb0671b6eba015e698533900c61c8e
- https://github.com/DuendeSoftware/IdentityServer/commit/d0d8eab35ad9183b14925496803ed8b36658d0a1
- https://github.com/DuendeSoftware/IdentityServer/commit/f04cf0be859b93f43563f8f812eb92206ad94011
- https://github.com/DuendeSoftware/IdentityServer/commit/fe817b499933d6ed6141b153492d7335c28b184a
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.