[Pkg-utopia-maintainers] Bug#891413: network-manager-pptp: PPTP connections fail on Authentication

[Adam Hough]

Package: network-manager-pptp
Version: 1.2.4-5+b1
Severity: grave
Justification: renders package unusable

Dear Maintainer,

   * What led up to the situation?

I did a normal apt upgrade which updated network-manager-pptp,
network-manager, ppp, and pptp-linux to the latest testing versions as of
24Feb2018. This caused my PPTP vpn connection to fail to connect because of
authentication issues with the MSCHAP and MSCHAPv2 protocals.

Feb 25 02:10:11 localhost pppd[31955]: Plugin
/usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
Feb 25 02:10:11 localhost NetworkManager[16904]: Plugin
/usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
Feb 25 02:10:11 localhost pppd[31955]: pppd 2.4.7 started by root, uid 0
Feb 25 02:10:11 localhost systemd-udevd[31959]: link_config:
autonegotiation is unset or enabled, the speed and duplex are not writable.
Feb 25 02:10:11 localhost NetworkManager[16904]: <info>  [1519553411.5971]
manager: (ppp0): new Ppp device (/org/freedesktop/NetworkManager/Devices/6)
Feb 25 02:10:11 localhost pppd[31955]: Using interface ppp0
Feb 25 02:10:11 localhost NetworkManager[16904]: Using interface ppp0
Feb 25 02:10:11 localhost NetworkManager[16904]: Connect: ppp0 <-->
/dev/pts/7
Feb 25 02:10:11 localhost pppd[31955]: Connect: ppp0 <--> /dev/pts/7
Feb 25 02:10:11 localhost pptp[31960]: nm-pptp-service-31951
log[main:pptp.c:353]: The synchronous pptp option is NOT activated
Feb 25 02:10:11 localhost NetworkManager[16904]: Error: either "to" is
duplicate, or "uid" is a garbage.
Feb 25 02:10:11 localhost NetworkManager[16904]: <info>  [1519553411.6134]
devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Feb 25 02:10:11 localhost NetworkManager[16904]: <info>  [1519553411.6134]
device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no
ifupdown configuration found.
Feb 25 02:10:11 localhost pptp[32023]: nm-pptp-service-31951
log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 1
'Start-Control-Connection-Request'
Feb 25 02:10:11 localhost pptp[32023]: nm-pptp-service-31951
log[ctrlp_disp:pptp_ctrl.c:781]: Received Start Control Connection Reply
Feb 25 02:10:11 localhost pptp[32023]: nm-pptp-service-31951
log[ctrlp_disp:pptp_ctrl.c:815]: Client connection established.
Feb 25 02:10:12 localhost pptp[32023]: nm-pptp-service-31951
log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 7
'Outgoing-Call-Request'
Feb 25 02:10:12 localhost pptp[32023]: nm-pptp-service-31951
log[ctrlp_disp:pptp_ctrl.c:900]: Received Outgoing Call Reply.
Feb 25 02:10:12 localhost pptp[32023]: nm-pptp-service-31951
log[ctrlp_disp:pptp_ctrl.c:939]: Outgoing call established (call ID 62435,
peer's call ID 51712).
Feb 25 02:10:13 localhost pppd[31955]: MS-CHAP authentication failed:
Feb 25 02:10:13 localhost NetworkManager[16904]: MS-CHAP authentication
failed:
Feb 25 02:10:13 localhost NetworkManager[16904]: CHAP authentication failed
Feb 25 02:10:13 localhost pppd[31955]: CHAP authentication failed
Feb 25 02:10:13 localhost pppd[31955]: Connection terminated.
Feb 25 02:10:13 localhost NetworkManager[16904]: Connection terminated.
Feb 25 02:10:13 localhost charon-nm[31069]: 13[KNL] interface ppp0 deleted

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

Downgrading just pptp-linux was not effective so I also downgraded the
following packages as well to get ppp to version 2.7.4-1+4:
gir1.2-nma-1.0 libnma0 network-manager network-manager-gnome
network-manager-pptp network-manager-pptp-gnome ppp pptp-linux pptpd

   * What was the outcome of this action?

After downgrading the packages, The PPTP base vpn connection is working.

   * What outcome did you expect instead?

I would have expected that the upgrade would not have broken MSCHAP and
MSCHAPv2 authenthication.


-- System Information:
Debian Release: buster/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.14.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages network-manager-pptp depends on:
ii  libc6            2.26-6
ii  libglib2.0-0     2.54.3-2
ii  libnm0           1.10.4-1+b1
ii  network-manager  1.10.4-1
ii  ppp              2.4.7-2+1
ii  pptp-linux       1.9.0+ds-2

network-manager-pptp recommends no packages.

network-manager-pptp suggests no packages.

-- no debconf information
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