An error in nfs-utils allows for bypass of the netgroups restriction.
|Package||net-fs/nfs-utils on all architectures|
|Affected versions||< 1.1.3|
|Unaffected versions||>= 1.1.3|
nfs-utils contains the client and daemon implementations for the NFS protocol.
Michele Marcionelli reported that nfs-utils invokes the hosts_ctl() function with the wrong order of arguments, which causes TCP Wrappers to ignore netgroups.
A remote attacker could bypass intended access restrictions, i.e. NFS netgroups, and gain access to restricted services.
There is no known workaround at this time.
All nfs-utils users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-fs/nfs-utils-1.1.3"
March 07, 2009
March 07, 2009: 01