Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html
lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html
bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145
gitlab.com/jas/libntlm/issues/2
lists.debian.org/debian-lts-announce/2020/05/msg00010.html
lists.debian.org/debian-lts-announce/2021/11/msg00026.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/
people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html
security-tracker.debian.org/tracker/CVE-2019-17455