| Package | Affected versions | Patched versions |
|---|---|---|
| nginx modsecurity waf | = r24= r25 | |
| http server | = 12.2.1.3.0= 12.2.1.4.0 | |
| zfs storage appliance kit | = 8.8 | |
| modsecurity | ≥ 3.0.0, < 3.0.6 | 3.0.6 |
| modsecurity | ≥ 2.0.0, < 2.9.5 | 2.9.5 |
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.
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