[原文]rpc.mountd in SGI IRIX 6.5.25, 6.5.26, and 6.5.27 does not correctly allow access to anonymous clients that connect from a system whose hostname can not be determined. NOTE: while this issue occurs in a security mechanism, there is no apparent attacker role and probably does not satisfy the CVE definition of a vulnerability.
IRIX rpc.mountd contains a flaw that may allow a denial of service. The issue is triggered when rpc.mountd incorrectly denies access to anonymous clients whose hostname is not listed in DNS, NIS or /etc/hosts. If an attacker were able to manipulate one of these naming services it could result in loss of availability to the service for some users.
Currently, there are no known workarounds or upgrades to correct this issue. However, SGI has released a patch to address this vulnerability.