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CVSS: 5.8EPSS: 0%CPEs: 1EXPL: 0

In Hydra (an OAuth2 Server and OpenID Certified™ OpenID Connect Provider written in Go), before version 1.4.0+oryOS.17, when using client authentication method 'private_key_jwt' [1], OpenId specification says the following about assertion `jti`: "A unique identifier for the token, which can be used to prevent reuse of the token. These tokens MUST only be used once, unless conditions for reuse were negotiated between the parties". Hydra does not check the uniqueness of this `jti` value. Exploiting this vulnerability is somewhat difficult because: - TLS protects against MITM which makes it difficult to intercept valid tokens for replay attacks - The expiry time of the JWT gives only a short window of opportunity where it could be replayed This has been patched in version v1.4.0+oryOS.17 En Hydra (un OAuth2 Server y OpenID Certified™ OpenID Connect Provider escrito en Go), versiones anteriores a 1.4.0+oryOS.17, cuando se usa el método de autenticación del cliente `private_key_jwt` [1], la especificación OpenId dice lo siguiente sobre la afirmación `jti`: "Un identificador único para el token, que puede ser usado para impedir la reutilización del token. Estos tokens DEBEN solo ser usados una vez, a menos que las condiciones de reutilización sean negociadas entre las partes". • https://github.com/ory/hydra/commit/700d17d3b7d507de1b1d459a7261d6fb2571ebe3 https://github.com/ory/hydra/releases/tag/v1.4.0 https://github.com/ory/hydra/security/advisories/GHSA-3p3g-vpw6-4w66 • CWE-294: Authentication Bypass by Capture-replay •

CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 1

Hydra through 0.1.8 has a NULL pointer dereference and daemon crash when processing POST requests that lack a Content-Length header. read.c, request.c, and util.c contribute to this. The process_header_end() function calls boa_atoi(), which ultimately calls atoi() on a NULL pointer. Hydra versiones hasta 0.1.8, presenta una desreferencia del puntero NULL y bloqueo del demonio cuando se procesan peticiones POST que carecen de un encabezado Content-Length. Los archivos read.c, request.c y util.c contribuyen a esto. La función process_header_end() llama a boa_atoi(), que en última instancia llama a atoi() sobre un puntero NULL. • http://hydra.hellug.gr https://gist.github.com/fxb6476/0b9883a88ff2ca40de46a8469834e16c • CWE-476: NULL Pointer Dereference •

CVSS: 6.1EPSS: 0%CPEs: 129EXPL: 2

ORY Hydra before v1.0.0-rc.3+oryOS.9 has Reflected XSS via the oauth2/fallbacks/error error_hint parameter. ORY Hydra, en versiones anteriores a la v1.0.0-rc.3+oryOS.9, tiene Cross-Site Scripting (XSS) reflejado mediante el parámetro error_hint en oauth2/fallbacks/error error_hint. • https://drive.google.com/file/d/1-25expUYVfK6vsiCmEabUCuelOP7aUDj/view?usp=drivesdk https://github.com/ory/hydra/blob/master/CHANGELOG.md#v100-rc3oryos9-2018-12-06 https://github.com/ory/hydra/commit/9b5bbd48a72096930af08402c5e07fce7dd770f3 https://hackerone.com/reports/456333 https://www.youtube.com/watch?v=RIyZLeKEC8E • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •