Description
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.
Updated: 2022-04-25 00:59:00 UTC (commit ecc1009cb19540b950de59270950018900f37f15)