Debian Security Advisory

DSA-5023-1 modsecurity-apache -- security update

Date Reported:
18 Dec 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-42717.
More information:

It was discovered that modsecurity-apache, an Apache module to tighten the Web application security, does not properly handles excessively nested JSON objects, which could result in denial of service. The update introduces a new SecRequestBodyJsonDepthLimit option to limit the maximum request body JSON parsing depth which ModSecurity will accept (defaults to 10000).

For the oldstable distribution (buster), this problem has been fixed in version 2.9.3-1+deb10u1.

For the stable distribution (bullseye), this problem has been fixed in version 2.9.3-3+deb11u1.

We recommend that you upgrade your modsecurity-apache packages.

For the detailed security status of modsecurity-apache please refer to its security tracker page at: