CVE-2016-4864 describes a denial-of-service (DoS) vulnerability affecting H2O versions 2.0.3 and earlier, and 2.1.0-beta2 and earlier. Remote attackers can trigger this DoS by injecting format string specifiers into template files through various H2O functionalities like fastcgi, mruby, proxy, redirect, or reproxy. With a CVSS v3.0 score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low attack complexity, requiring no user interaction, and leading to a complete loss of availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.0.0, <= 2.0.3CPE matchmatch criteria | cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:* | ||
2.1.0CPE matchmatch criteria | cpe:2.3:a:dena:h2o:2.1.0:*:*:*:*:*:*:* | ||
2.1.0CPE matchmatch criteria | cpe:2.3:a:dena:h2o:2.1.0:beta1:*:*:*:*:*:* |
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.