Package: nfs-kernel-server
Version: 1:1.0.10-4
Severity: important

The nfs-kernel-server seems to silently ignore the map_daemon option. I don't know whether uid/gid mapping via ugidd is a feature of nfs-kernel-server or not, i.e. whether map_daemon should work at all, however silently ignoring the option has (maybe mild, feel free to adjust the proposed severity) security implications:

An administrator may want to use uid/gid mapping for access control
(which makes sense in a LAN environment where root is trusted on client computers) and is switching from nfs-user-server to nfs-kernel-server (or is assuming that map_daemon is supported by nfs-kernel-server for any other reason). Instead of reporting an error and refusing to run, the kernel server starts and exports without uid/gid mapping, which leads to (possibly wildly) incorrect access restrictions on the clients.

Suggestion for resolution: When the server finds map_daemon in /etc/exports, it either should honour it or it should refuse to run.

Best regards,

Thiemo

-- System Information:
Debian Release: 4.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.17-2-k7
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)

Versions of packages nfs-kernel-server depends on:
ii  libc6    2.3.6.ds1-8                     GNU C Library: Shared libraries
ii  libcomer 1.39+1.40-WIP-2006.11.14+dfsg-1 common error description
library
ii  libgssap 0.10-4                          A mechanism-switch gssapi
library
ii  libkrb53 1.4.4-4                         MIT Kerberos runtime libraries
ii  libnfsid 0.18-0                          An nfs idmapping library
ii  librpcse 0.14-2                          allows secure rpc
communication us
ii  lsb-base 3.1-22                          Linux Standard Base 3.1
init scrip
ii  nfs-comm 1:1.0.10-4                      NFS support files common to
client
ii  ucf      2.0017                          Update Configuration File:
preserv

nfs-kernel-server recommends no packages.

-- no debconf information



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