In Sudo before 1.8.28, an attacker with access to a Runas ALL sudoer account can bypass certain policy blacklists and session PAM modules, and can cause incorrect logging, by invoking sudo with a crafted user ID. For example, this allows bypass of !root configuration, and USER= logging, for a "sudo -u \#$((0xffffffff))" command.
https://www.sudo.ws/alerts/minus_1_uid.html
https://www.openwall.com/lists/oss-security/2019/10/15/2
https://www.debian.org/security/2019/dsa-4543
https://usn.ubuntu.com/4154-1/
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03976en_us
https://support.f5.com/csp/article/K53746212?utm_source=f5support&%3Butm_medium=RSS
https://security.netapp.com/advisory/ntap-20191017-0003/
https://security.gentoo.org/glsa/202003-12
https://seclists.org/bugtraq/2019/Oct/21
https://seclists.org/bugtraq/2019/Oct/20
https://resources.whitesourcesoftware.com/blog-whitesource/new-vulnerability-in-sudo-cve-2019-14287
https://lists.debian.org/debian-lts-announce/2019/10/msg00022.html
https://access.redhat.com/errata/RHSA-2020:0388
https://access.redhat.com/errata/RHSA-2019:4191
https://access.redhat.com/errata/RHSA-2019:3941
https://access.redhat.com/errata/RHSA-2019:3916
https://access.redhat.com/errata/RHSA-2019:3895
https://access.redhat.com/errata/RHSA-2019:3755
https://access.redhat.com/errata/RHSA-2019:3754
https://access.redhat.com/errata/RHSA-2019:3694
https://access.redhat.com/errata/RHSA-2019:3278
https://access.redhat.com/errata/RHSA-2019:3219
https://access.redhat.com/errata/RHSA-2019:3209
https://access.redhat.com/errata/RHSA-2019:3205
https://access.redhat.com/errata/RHSA-2019:3204
https://access.redhat.com/errata/RHSA-2019:3197
https://access.redhat.com/errata/RHBA-2019:3248
http://www.openwall.com/lists/oss-security/2021/09/14/2
http://www.openwall.com/lists/oss-security/2019/10/29/3
http://www.openwall.com/lists/oss-security/2019/10/24/1
http://www.openwall.com/lists/oss-security/2019/10/14/1
http://packetstormsecurity.com/files/154853/Slackware-Security-Advisory-sudo-Updates.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00042.html