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CWE

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CVE-2021-42717

Published: Dec 7, 2021

Modified: Aug 4, 2024

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

vendor-advisory

x_refsource_DEBIAN

https://www.oracle.com/security-alerts/cpuapr2022.html

x_refsource_MISC

https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-dos-vulnerability-in-json-parsing-cve-2021-42717/

x_refsource_MISC

[debian-lts-announce] 20220528 [SECURITY] [DLA 3031-1] modsecurity-apache security update

mailing-list

x_refsource_MLIST

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