It was found that libpam4j prior to 1.10 did not properly validate user accounts when authenticating. A user with a valid password for a disabled account would be able to bypass security restrictions and possibly access sensitive information.
access.redhat.com/errata/RHSA-2017:2904
access.redhat.com/errata/RHSA-2017:2905
access.redhat.com/errata/RHSA-2017:2906
bugzilla.redhat.com/show_bug.cgi?id=1503103
github.com/kohsuke/libpam4j
github.com/kohsuke/libpam4j/commit/02ffdff218283629ba4a902e7fe2fd44646abc21
github.com/kohsuke/libpam4j/issues/18
lists.debian.org/debian-lts-announce/2017/11/msg00008.html
nvd.nist.gov/vuln/detail/CVE-2017-12197
www.debian.org/security/2017/dsa-4025