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.
History

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2021-12-07T21:08:28

Updated: 2022-05-28T09:06:09

Reserved: 2021-10-19T00:00:00


Link: CVE-2021-42717

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2021-12-07T22:15:06.950

Modified: 2022-09-03T03:33:10.373


Link: CVE-2021-42717

JSON object: View

cve-icon Redhat Information

No data.

CWE