CVE-2017-17439 is a denial-of-service vulnerability affecting Heimdal through version 7.4, specifically impacting Debian Linux distributions. Remote, unauthenticated attackers can crash the Kerberos Distribution Center (KDC) by sending a specially crafted UDP packet with empty client name or realm data fields, leading to a NULL pointer dereference and segmentation fault. This vulnerability carries a CVSS v3.0 score of 7.5 (HIGH), indicating a network-based attack with low complexity and no user interaction required, resulting in high availability impact. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
<= 7.4.0CPE matchmatch criteria | cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.