Integer overflow in shadow 4.2.1 allows local users to gain privileges via crafted input to newuidmap.
www.debian.org/security/2017/dsa-3793
www.openwall.com/lists/oss-security/2016/07/19/6
www.openwall.com/lists/oss-security/2016/07/19/7
www.openwall.com/lists/oss-security/2016/07/20/2
www.openwall.com/lists/oss-security/2016/07/25/7
www.securityfocus.com/bid/92055
bugzilla.suse.com/show_bug.cgi?id=979282
github.com/shadow-maint/shadow/issues/27
security.gentoo.org/glsa/201706-02