[Bug 1217183] Re: libgcrypt11 version 1.5.0-3ubuntu2.2 breaks vpnc for cisco 3000 gateway

[mitch_feaster]

I'm also not 100% sure that libgcrpyt11 is to "blame" but as I changed
one variable at a time that was where my bisection landed. I also
confirmed that going back to the latest libgcrypt11 re-broke things, and
re-rolling-back re-fixed them. Notably, my vpn account wasn't locked out
and my password had not expired.

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Title:
  libgcrypt11 version 1.5.0-3ubuntu2.2 breaks vpnc for cisco 3000
  gateway

Status in “libgcrypt11” package in Ubuntu:
  Confirmed

Bug description:
  It appears that version 1.5.0-3ubuntu2.2 of libgcrypt11 breaks vpnc
  for some cisco 3000 vpn gateways. Ever since I updated I haven't been
  able to connect, but today I rolled back to
  libgcrypt11=1.5.0-3ubuntu2.1 and things are working again. Note that I
  tried with 1.5.0-3ubuntu2.2 immediately before rolling back so it's
  highly unlikely that anything changes on the cisco gateway side to fix
  it.

  With libgcrypt11=1.5.0-3ubuntu2.2 I was seeing the following messages
  in /var/log/syslog:

      Aug 21 22:44:56 sonbuntu NetworkManager[1193]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/tun0, iface: tun0)
      Aug 21 22:44:56 sonbuntu NetworkManager[1193]:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/tun0, iface: tun0): no ifupdown configuration found.
      Aug 21 22:44:56 sonbuntu NetworkManager[1193]: <warn> /sys/devices/virtual/net/tun0: couldn't determine device driver; ignoring...
      Aug 21 22:47:06 sonbuntu avahi-daemon[1116]: Withdrawing workstation service for tun0.
      Aug 21 22:47:06 sonbuntu NetworkManager[1193]:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/tun0, iface: tun0)
      Aug 21 22:48:08 sonbuntu NetworkManager[1193]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/tun0, iface: tun0)
      Aug 21 22:48:08 sonbuntu NetworkManager[1193]:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/tun0, iface: tun0): no ifupdown configuration found.
      Aug 21 22:48:08 sonbuntu NetworkManager[1193]: <warn> /sys/devices/virtual/net/tun0: couldn't determine device driver; ignoring...

  I also strace'd vpnc and things seemed to hang around here:

      time(NULL)                              = 1377150323
      times({tms_utime=8, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1717972828
      gettimeofday({1377150323, 725505}, NULL) = 0
      getrusage(RUSAGE_SELF, {ru_utime={0, 88000}, ru_stime={0, 16000}, ...}) = 0
      time(NULL)                              = 1377150323
      times({tms_utime=8, tms_stime=1, tms_cutime=0, tms_cstime=0}) = 1717972828
      time(NULL)                              = 1377150323
      poll([{fd=3, events=POLLIN}], 1, 96000) = 0 (Timeout)
      poll([{fd=3, events=POLLIN}], 1, 192000^C <unfinished ...>

  
  After rolling back to libgcrypt11=1.5.0-3ubuntu2.1 I don't see these messages and I can successfully connect to my vpn.

  See also: http://askubuntu.com/questions/335694/vpnc-has-stopped-
  working-with-cisco-vpn-gateway-ubuntu-13-04

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