NAS is a network transparent, client/server audio transport system.
Luigi Auriemma has discovered multiple vulnerabilities in NAS, some of which include a buffer overflow in the function accept_att_local(), an integer overflow in the function ProcAuWriteElement(), and a null pointer error in the function ReadRequestFromClient().
An attacker having access to the NAS daemon could send an overly long slave name to the server, leading to the execution of arbitrary code with root privileges. A remote attacker could also send a specially crafted packet containing an invalid client ID, which would crash the server and result in a Denial of Service.
There is no known workaround at this time.
All NAS users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/nas-1.8b"