CVE-2021-20230

Se encontró un fallo en stunnel versiones anteriores a 5.57, donde comprueba inapropiadamente los certificados del cliente cuando está configurado para usar las opciones de redireccionamiento y verifyChain. Este fallo permite a un atacante con un certificado firmado por una Autoridad de Certificación, que no es el aceptado por el servidor de stunnel, para acceder al servicio de túnel en lugar de ser redireccionado a la dirección especificada en la opción de redireccionamiento. La mayor amenaza de esta vulnerabilidad es la confidencialidad

A flaw was found in stunnel, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.

Red Hat Advanced Cluster Management for Kubernetes 2.0.8 images. Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which resolve some security issues and bugs.