CRI-O vulnerabilities

CRI-O has a vulnerability in environment-variable handling during container creation. When a CreateContainer request has a nil Envs field, CRI-O uses unfiltered config.Env entries from the OCI image, which can cause a Go panic and crash the crio daemon. This occurs when an entry lacks '='.

A flaw was found in CRI-O where the fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME variable, enabling arbitrary lines to be added to /etc/passwd.

There's a vulnerability in the CRI-O application where when a container is launched with securityContext.runAsUser specifying a non-existent user, CRI-O attempts to create the user, reading the container's entire /etc/passwd file into memory. If this file is excessively large, it can cause high memory consumption leading applications to be killed due to out-of-memory. As a result a denial-of-service can be achieved, possibly disrupting other pods and services running on the same host.

A flaw was found in cri-o. A malicious container can create a symbolic link to arbitrary files on the host via directory traversal (“../“). This flaw allows the container to read and write to arbitrary files on the host system.