A modsecurity-apache security update has been released for Debian GNU/Linux 9 Extended LTS to address multiple issues.

ELA-779-1 modsecurity-apache security update

Package : modsecurity-apache
Version : 2.9.1-2+deb9u2 (stretch)

Related CVEs :
CVE-2022-48279
CVE-2023-24021

Multiple issues were found in modsecurity-apache, open source, cross
platform web application firewall (WAF) engine for Apache which allows
remote attackers to bypass the applications firewall and other
unspecified impact.

CVE-2022-48279
In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart
requests were incorrectly parsed and could bypass the Web Application
Firewall.
NOTE: this is related to CVE-2022-39956 but can be considered
independent changes to the ModSecurity (C language) codebase.

CVE-2023-24021
Incorrect handling of null-bytes in file uploads in ModSecurity
before 2.9.7 may allow for Web Application Firewall bypasses and
buffer overflows on the Web Application Firewall when executing
rules reading the FILES_TMP_CONTENT collection.

  ELA-779-1 modsecurity-apache security update