Multiple denial-of-service attacks that can be triggered by writing to the terminal exist in PuTTY versions before 0.71.Referenceshttps://www.chiark.greenend.org.uk/~sgtatham/putty/changes.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2/http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.htmlhttps://seclists.org/bugtraq/2019/Apr/6https://security.netapp.com/advisory/ntap-20190404-0001/https://www.debian.org/security/2019/dsa-4423https://lists.debian.org/debian-lts-announce/2019/04/msg00023.html