If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux duex 3.7.0-rc8-custom+ #1 SMP Sat Dec 8 18:00:39 CET 2012 x86_64 x86_64 x86_64 GNU/Linux
 
Gnu C                  4.7
Gnu make               3.81
binutils               2.23.1
util-linux             2.20.1
mount                  support
module-init-tools      9
e2fsprogs              1.42.5
pcmciautils            018
PPP                    2.4.5
Linux C Library        2.16
Dynamic linker (ldd)   2.16
Procps                 3.3.3
Net-tools              1.60
Kbd                    1.15.3
Sh-utils               8.20
wireless-tools         30
Modules Loaded         snd_hda_codec_hdmi coretemp kvm_intel kvm ghash_clmulni_intel aesni_intel aes_x86_64 ablk_helper cryptd xts lrw gf128mul hid_generic psmouse snd_hda_codec_realtek snd_seq_midi snd_seq_midi_event snd_rawmidi usbhid snd_hda_intel snd_hda_codec hid serio_raw microcode snd_seq snd_hwdep snd_pcm snd_seq_device snd_page_alloc snd_timer radeon mac_hid ttm snd drm_kms_helper video drm bnep rfcomm i2c_algo_bit mei soundcore bluetooth lpc_ich parport_pc ppdev lp parport btrfs libcrc32c zlib_deflate r8169