CVE-2019-17455 is a critical stack-based buffer over-read vulnerability in Libntlm versions up to 1.5, affecting products from Canonical, Debian, Fedora Project, nongnu, and OpenSUSE. It stems from fixed buffer sizes in NTLM authentication request, challenge, and response handling. With a CVSS score of 9.8, this vulnerability allows unauthenticated attackers to achieve high impact on confidentiality, integrity, and availability over the network with low attack complexity. Despite its severity, there is no known public exploit code (Metasploit, Nuclei, ExploitDB), it is not on the KEV catalog, and it has garnered minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 1.5CPE matchmatch criteria | cpe:2.3:a:nongnu:libntlm:*:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
14.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* | ||
16.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
CVE-2019-17455
Jan 11, 2022Libntlm 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.
Oct 8, 2019libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c
Oct 8, 2019