Rapid7’s 2026 Global Cybersecurity Summit is now available on-demand.Watch sessions.
Rapid7

vulnerability

Amazon Linux AMI 2: CVE-2023-24021: Security patch for mod_security (Multiple Advisories)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:C/A:N)
Published
Jan 20, 2023
Added
Jul 4, 2023
Modified
May 20, 2026

Description

Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.

Solutions

amazon-linux-ami-2-upgrade-mod_securityamazon-linux-ami-2-upgrade-mod_security-debuginfoamazon-linux-ami-2-upgrade-mod_security-mlogc
Title
Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.