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CVE-2021-42717 PUBLISHED

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.

EPSS 2.04% · 83.7th percentile

Risk Scores

EPSS Score
2.04%
83.7th percentile

Affected Products

VendorProductVersions
Bitnamimodsecurity22.0.0, 2.0.0, 2.0.0
Bitnamimodsecurity2.0.0
Bitnamimodsecurity22.0.0
Bitnamimodsecurity2.0.0, 2.0.0, 2.0.0

Timeline

References

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