CVE-2022-23538

github.com/sylabs/scs-library-client is the Go client for the Singularity
Container Services (SCS) Container Library Service. When the
scs-library-client is used to pull a container image, with authentication,
the HTTP Authorization header sent by the client to the library service may
be incorrectly leaked to an S3 backing storage provider. This occurs in a
specific flow, where the library service redirects the client to a backing
S3 storage server, to perform a multi-part concurrent download. Depending
on site configuration, the S3 service may be provided by a third party. An
attacker with access to the S3 service may be able to extract user
credentials, allowing them to impersonate the user. The vulnerable
multi-part concurrent download flow, with redirect to S3, is only used when
communicating with a Singularity Enterprise 1.x installation, or third
party server implementing this flow. Interaction with Singularity
Enterprise 2.x, and Singularity Container Services (cloud.sylabs.io), does
not trigger the vulnerable flow. We encourage all users to update. Users
who interact with a Singularity Enterprise 1.x installation, using a 3rd
party S3 storage service, are advised to revoke and recreate their
authentication tokens within Singularity Enterprise. There is no workaround
available at this time.

Notes