A NULL pointer dereference exists in curl 7.21.0 to and including curl 7.58.0 in the LDAP code that allows an attacker to cause a denial of service
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://www.debian.org/security/2018/dsa-4136
https://usn.ubuntu.com/3598-2/
https://usn.ubuntu.com/3598-1/
https://lists.debian.org/debian-lts-announce/2018/03/msg00012.html
https://curl.haxx.se/docs/adv_2018-97a2.html
https://access.redhat.com/errata/RHSA-2020:0594
https://access.redhat.com/errata/RHSA-2020:0544
https://access.redhat.com/errata/RHSA-2018:3558
https://access.redhat.com/errata/RHSA-2018:3157
https://access.redhat.com/errata/RHBA-2019:0327
http://www.securitytracker.com/id/1040529
http://www.securityfocus.com/bid/103415
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html