CVE-2021-42717
Published: 7 December 2021
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.
Priority
CVSS 3 base score: 7.5
Status
Package | Release | Status |
---|---|---|
modsecurity Launchpad, Ubuntu, Debian |
focal |
Needs triage
|
hirsute |
Ignored
(reached end-of-life)
|
|
impish |
Needs triage
|
|
jammy |
Needs triage
|
|
trusty |
Ignored
(out of standard support)
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(out of standard support)
|
|
modsecurity-apache Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
focal |
Needs triage
|
|
hirsute |
Ignored
(reached end-of-life)
|
|
impish |
Needs triage
|
|
jammy |
Needs triage
|
|
trusty |
Needs triage
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(out of standard support)
|