ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case (in stable released versions): when the payload's content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | alma-upgrade-mod_securityalma-upgrade-mod_security-mlogc | Jun 13, 2025 | May 21, 2025 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-mod_securityamazon-linux-ami-2-upgrade-mod_security-debuginfoamazon-linux-ami-2-upgrade-mod_security-mlogc | Jun 13, 2025 | May 21, 2025 | |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-mod-securityamazon-linux-2023-upgrade-mod-security-debuginfoamazon-linux-2023-upgrade-mod-security-debugsourceamazon-linux-2023-upgrade-mod-security-mlogcamazon-linux-2023-upgrade-mod-security-mlogc-debuginfo | Jun 24, 2025 | May 21, 2025 | |
| Debian | debian-upgrade-modsecurity-apache | May 28, 2025 | May 21, 2025 | |
| Freebsd | freebsd-upgrade-package-ap24-mod_security | Jun 6, 2025 | Jun 6, 2025 | |
| Oracle_linux | — | oracle-linux-upgrade-mod-securityoracle-linux-upgrade-mod-security-mlogc | Jun 30, 2025 | May 21, 2025 |
| Redhat_linux | redhat-upgrade-mod_securityredhat-upgrade-mod_security-debuginforedhat-upgrade-mod_security-debugsourceredhat-upgrade-mod_security-mlogcredhat-upgrade-mod_security-mlogc-debuginfo | Jun 12, 2025 | May 21, 2025 | |
| Rocky_linux | rocky-upgrade-mod_securityrocky-upgrade-mod_security-debuginforocky-upgrade-mod_security-debugsourcerocky-upgrade-mod_security-mlogcrocky-upgrade-mod_security-mlogc-debuginfo | Sep 9, 2025 | Jul 29, 2025 | |
| Suse | — | suse-upgrade-apache2-mod_security2 | Dec 5, 2025 | Jun 13, 2025 |
| Ubuntu | ubuntu-pro-upgrade-libapache2-mod-security2ubuntu-pro-upgrade-libapache2-modsecurityubuntu-upgrade-libapache2-mod-security2 | Jun 17, 2025 | May 21, 2025 |
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