CVE-2021-42717 describes a denial-of-service vulnerability in ModSecurity versions 3.x through 3.0.5 and 2.8.0 through 2.9.4, affecting products like Debian, F5, Oracle, OWASP, and Trustwave. Attackers can craft excessively nested JSON objects to consume significant CPU resources and render the web server unable to process legitimate requests. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, leading to high availability impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.0.0, < 3.0.6CPE matchmatch criteria | cpe:2.3:a:owasp:modsecurity:*:*:*:*:*:*:*:* | ||
>= 2.0.0, < 2.9.5CPE matchmatch criteria | cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:* | ||
r24CPE matchmatch criteria | cpe:2.3:a:f5:nginx_modsecurity_waf:r24:*:*:*:*:*:*:* | ||
r25CPE matchmatch criteria | cpe:2.3:a:f5:nginx_modsecurity_waf:r25:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.