7.5
CVE-2021-42717
- EPSS 2.22%
- Published 07.12.2021 22:15:06
- Last modified 03.07.2025 20:59:18
- Source cve@mitre.org
- Teams watchlist Login
- Open Login
ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.
Data is provided by the National Vulnerability Database (NVD)
Owasp ≫ Modsecurity Version >= 3.0.0 < 3.0.6
Trustwave ≫ Modsecurity Version >= 2.0.0 < 2.9.5
F5 ≫ Nginx Modsecurity Waf Versionr24
F5 ≫ Nginx Modsecurity Waf Versionr25
Debian ≫ Debian Linux Version9.0
Debian ≫ Debian Linux Version10.0
Debian ≫ Debian Linux Version11.0
Oracle ≫ HTTP Server Version12.2.1.3.0
Oracle ≫ HTTP Server Version12.2.1.4.0
Oracle ≫ Zfs Storage Appliance Kit Version8.8
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
| Type | Source | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 2.22% | 0.838 |
| Source | Base Score | Exploit Score | Impact Score | Vector string |
|---|---|---|---|---|
| nvd@nist.gov | 7.5 | 3.9 | 3.6 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
|
| nvd@nist.gov | 5 | 10 | 2.9 |
AV:N/AC:L/Au:N/C:N/I:N/A:P
|
CWE-674 Uncontrolled Recursion
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.