CVE-2022-39958
7.5 · HIGHOverview
CVE-2022-39958 is a high-severity vulnerability affecting owasp owasp_modsecurity_core_rule_set. It was published on September 20, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by repeatedly submitting an HTTP Range header field with a small byte range. A restricted resource, access to which would ordinarily be detected, may be exfiltrated from the backend, despite being protected by a web application firewall that uses CRS. Short subsections of a restricted resource may bypass pattern matching techniques and allow undetected access. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised to upgrade to 3.2.2 and 3.3.3 respectively and to configure a CRS paranoia level of 3 or higher.
Remediation
Check the references section for vendor advisories and patches from owasp. Update owasp_modsecurity_core_rule_set to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| owasp | owasp_modsecurity_core_rule_set | >= 3.0.0, < 3.2.2 | Affected |
References
Frequently Asked Questions
What is CVE-2022-39958?
CVE-2022-39958 is a high-severity vulnerability affecting owasp owasp_modsecurity_core_rule_set. It was published on September 20, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2022-39958?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2022-39958?
Check the references section for vendor advisories and patches from owasp. Update owasp_modsecurity_core_rule_set to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2022-39958?
CyberStrike's AI-powered security agents can automatically detect CVE-2022-39958 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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