{"id":"CVE-2019-17455","details":"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.","modified":"2026-07-08T05:56:40.212787552Z","published":"2019-10-10T18:15:11.647Z","related":["openSUSE-SU-2020:0806-1","openSUSE-SU-2020:0816-1","openSUSE-SU-2024:10963-1"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"],"extracted_events":[{"introduced":"14.04"},{"last_affected":"14.04"},{"introduced":"16.04"},{"last_affected":"16.04"},{"introduced":"18.04"},{"last_affected":"18.04"},{"introduced":"20.04"},{"last_affected":"20.04"}],"source":"CPE_STRING","vendor_product":"canonical:ubuntu_linux"},{"vendor_product":"debian:debian_linux","cpes":["cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.0"},{"last_affected":"8.0"},{"introduced":"9.0"},{"last_affected":"9.0"}],"source":"CPE_STRING"},{"cpes":["cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"32"},{"last_affected":"32"},{"introduced":"33"},{"last_affected":"33"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"},{"cpes":["cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*"],"extracted_events":[{"introduced":"15.0-sp1"},{"last_affected":"15.0-sp1"}],"source":"CPE_STRING","vendor_product":"opensuse:backports_sle"},{"cpes":["cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"15.1"},{"last_affected":"15.1"}],"source":"CPE_STRING","vendor_product":"opensuse:leap"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html"},{"type":"ADVISORY","url":"https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html"},{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2019-17455"},{"type":"REPORT","url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145"},{"type":"EVIDENCE","url":"https://gitlab.com/jas/libntlm/issues/2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/jas/libntlm","events":[{"introduced":"0"},{"last_affected":"8adf90b0bf2ca8cc55c7cd655d566fd1a74bf90a"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:nongnu:libntlm:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"1.5"}]}}],"versions":["libntlm-1-5","libntlm-1-4","libntlm-1-3","libntlm-1-2","libntlm-1-1","libntlm-1-0","libntlm-0-4-2","libntlm-0-4-1","libntlm-0-4-0","libntlm-0-3-13","libntlm-0-3-12","libntlm-0-3-11","libntlm-0-3-10","libntlm-0-3-9","libntlm-0-3-8","libntlm-0-3-7","libntlm-0-3-6","libntlm-0-3-5","libntlm-0-3-4","libntlm-0-3-3","libntlm-0-3-2","libntlm-0-3-1","libntlm-0-3-0","libntlm-0-21","libntlm-0-2","libntlm-0-1","libntlm-0-0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-17455.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}