Comment 31 for bug 1644428

Updated packages to latest.
Also having this issue. After symlinking /lib/x86_64-linux-gnu/security to /lib/security, receiving:

Jul 19 12:05:41 hostname login[28882]: PAM unable to dlopen(pam_winbind.so): /lib/security/pam_winbind.so: undefined symbol: wbcCtxFree
Jul 19 12:05:41 hostname login[28882]: PAM adding faulty module: pam_winbind.so

user@hostname:/lib$ dpkg -l | grep 'samba\|winbind' | awk '{print $2" --- "$3}'
libnss-winbind:amd64 --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
libpam-winbind:amd64 --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
libwbclient0:amd64 --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
python-samba --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
samba --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
samba-common --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
samba-common-bin --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
samba-dsdb-modules --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
samba-libs:amd64 --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
samba-vfs-modules --- 2:4.5.8+dfsg-0ubuntu0.17.04.4
winbind --- 2:4.5.8+dfsg-0ubuntu0.17.04.4