Andrew Deason

A local user can bypass the OpenAFS PAG (Process Authentication Group) throttling mechanism in Unix clients, allowing the user to create a PAG using an existing id number, effectively joining the PAG and letting the user steal the credentials in that PAG.

An authenticated user can provide a malformed ACL to the fileserver's StoreACL RPC, causing the fileserver to crash, possibly expose uninitialized memory, and possibly store garbage data in the audit log. Malformed ACLs provided in responses to client FetchACL RPCs can cause client processes to crash and possibly expose uninitialized memory into other ACLs stored on the server.

A malicious server can crash the OpenAFS cache manager and other client utilities, and possibly execute arbitrary code.

The issue is related to an information disclosure problem. Uninitialized scalars are sent over the network to a peer, which can lead to sensitive information being exposed.