CVE-2022-31034

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. All versions of Argo CD starting with v0.11.0 are vulnerable to a variety of attacks when an SSO login is initiated from the Argo CD CLI or UI. The vulnerabilities are due to the use of insufficiently random values in parameters in Oauth2/OIDC login flows. In each case, using a relatively-predictable (time-based) seed in a non-cryptographically-secure pseudo-random number generator made the parameter less random than required by the relevant spec or by general best practices. In some cases, using too short a value made the entropy even less sufficient. The attacks on login flows which are meant to be mitigated by these parameters are difficult to accomplish but can have a high impact potentially granting an attacker admin access to Argo CD. Patches for this vulnerability has been released in the following Argo CD versions: v2.4.1, v2.3.5, v2.2.10 and v2.1.16. There are no known workarounds for this vulnerability.

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. All versions of Argo CD starting with v0.11.0 are vulnerable to a variety of attacks when an SSO login is initiated from the Argo CD CLI or UI. The vulnerabilities are due to the use of insufficiently random values in parameters in Oauth2/OIDC login flows. In each case, using a relatively-predictable (time-based) seed in a non-cryptographically-secure pseudo-random number generator made the parameter less random than required by the relevant spec or by general best practices. In some cases, using too short a value made the entropy even less sufficient. The attacks on login flows which are meant to be mitigated by these parameters are difficult to accomplish but can have a high impact potentially granting an attacker admin access to Argo CD. Patches for this vulnerability has been released in the following Argo CD versions: v2.4.1, v2.3.5, v2.2.10 and v2.1.16. There are no known workarounds for this vulnerability.

Insecure entropy in Argo CD's PKCE/Oauth2/OIDC params in github.com/argoproj/argo-cd

### Impact All versions of Argo CD starting with v0.11.0 are vulnerable to a variety of attacks when an SSO login is initiated from the Argo CD CLI or UI. The vulnerabilities are due to the use of insufficiently random values in parameters in Oauth2/OIDC login flows. In each case, using a relatively-predictable (time-based) seed in a non-cryptographically-secure pseudo-random number generator made the parameter less random than required by the relevant spec or by general best practices. In some cases, using too short a value made the entropy even less sufficient. (The specific weak parameters are listed in the References section.) The attacks on login flows which are meant to be mitigated by these parameters are difficult to accomplish but can have a high impact (potentially granting an attacker admin access to Argo CD). The CVSS for this Security Advisory assumes the worst-case scenario. ### Patches A patch for this vulnerability has been released in the following Argo CD versions: * v2.4.1 * v2.3.5 * v2.2.10 * v2.1.16 ### Workarounds There are no workarounds. You must upgrade to a patched version to resolve the vulnerability. ### References These are the insufficiently-random parameters: 1. (since 0.11.0) The [`state` parameter](https://datatracker.ietf.org/doc/html/rfc6749#section-4.1.1) generated by the `argocd login` command for Oauth2 login used a non-cryptographically secure source of entropy and generated a parameter that was too short to provide the entropy [required in the spec](https://datatracker.ietf.org/doc/html/rfc6749#section-10.10). This parameter is a "recommended" part of the Oauth2 flow and helps protect against cross-site request forgery attacks. 2. (since 1.7.2, when PKCE was added) The [`code_verifier` parameter](https://datatracker.ietf.org/doc/html/rfc7636#section-4.1) generated by the `argocd login` command for Oauth2+PKCE login used a non-cryptographically secure source of entropy. The attacks mitigated by PKCE [are complex but have been observed in the wild](https://datatracker.ietf.org/doc/html/rfc7636#section-1). 3. (since 0.11.0) The [`state` parameter](https://datatracker.ietf.org/doc/html/rfc6749#section-4.1.1) generated by the Argo CD API server during a UI-initiated Oauth2 login used a non-cryptographically secure source of entropy and generated a parameter that was too short to provide the entropy [required in the spec](https://datatracker.ietf.org/doc/html/rfc6749#section-10.10). This parameter is a "recommended" part of the Oauth2 flow and helps protect against cross-site request forgery attacks. 4. (since 0.11.0) The [`nonce` parameter](https://openid.net/specs/openid-connect-core-1_0.html#ImplicitAuthRequest) generated by the Argo CD API server during a UI-initiated Oauth2 implicit flow login used a non-cryptographically secure source of entropy and generated a parameter that was too short to provide sufficient entropy. This parameter is a required part of the OIDC implicit login flow and helps protect against replay attacks. ### Credits Originally discovered by @jgwest. @jannfis and @crenshaw-dev re-discovered the vulnerability when reviewing notes from ADA Logics' security audit of the Argo project sponsored by CNCF and facilitated by OSTIF. Thanks to Adam Korczynski and David Korczynski for their work on the audit. ### For more information * Open an issue in [the Argo CD issue tracker](https://github.com/argoproj/argo-cd/issues) or [discussions](https://github.com/argoproj/argo-cd/discussions) * Join us on [Slack](https://argoproj.github.io/community/join-slack) in channel #argo-cd

Argo CD es una herramienta declarativa de entrega continua GitOps para Kubernetes. Todas las versiones de Argo CD a partir de la v0.11.0, son vulnerables a una variedad de ataques cuando es iniciado un inicio de sesión SSO desde la CLI o la UI de Argo CD. Las vulnerabilidades son debido a un uso de valores insuficientemente aleatorios en los parámetros de los flujos de inicio de sesión Oauth2/OIDC. En cada caso, el uso de una semilla relativamente predecible (basada en el tiempo) en un generador de números pseudoaleatorios no seguro desde el punto de vista criptográfico hizo que el parámetro fuera menos aleatorio de lo requerido por la especificación correspondiente o por las mejores prácticas generales. En algunos casos, el uso de un valor demasiado corto hacía que la entropía fuera aún menos suficiente. Los ataques a los flujos de inicio de sesión que pretenden mitigarse con estos parámetros son difíciles de llevar a cabo, pero pueden tener un alto impacto, pudiendo conceder a un atacante acceso de administrador a Argo CD. Han sido publicados parches para esta vulnerabilidad en las siguientes versiones de Argo CD: v2.4.1, v2.3.5, v2.2.10 y v2.1.16. No son conocidas mitigaciones para esta vulnerabilidad