Security readout for executives and security teams
Plain-English summary
This CVE describes a denial-of-service risk in ModSecurity 3.x before 3.0.4. A malformed key-value header can cause a parsing error and crash a worker process. The public sources do not show data theft, code execution, or confirmed active exploitation.
Executive priority
Prioritize remediation for internet-facing web services using affected ModSecurity versions. The main business risk is degraded availability or reduced web protection if worker crashes accumulate or restart handling is weak.
Technical view
ModSecurity 3.x before 3.0.4 mishandles key-value pair parsing. The cited issue demonstrates a string-index error and worker-process crash triggered during Cookie header parsing. Evidence in the bundle supports a crash-level availability impact, not remote code execution or privilege escalation.
Likely exposure
Exposure is most likely where ModSecurity 3.x before 3.0.4 protects web applications, especially internet-facing services. The bundle does not identify specific operating systems, connectors, packaged distributions, or managed services as affected.
Exploitation context
CISA KEV status is false, and the provided sources do not report active exploitation. The public evidence demonstrates a malformed-input crash condition. Treat it as an availability issue unless vendor advisories show broader impact.
Researcher notes
The available record is sparse: no CVSS, CWE, vendor matrix, or exploit-in-the-wild claim is provided. Analysis is grounded in the CVE description and the referenced GitHub issue showing a parsing crash before version 3.0.4.
Mitigation direction
- Inventory ModSecurity deployments and confirm exact 3.x versions.
- Upgrade affected ModSecurity 3.x deployments to 3.0.4 or later.
- Check vendor or package maintainer guidance for backported fixes.
- Ensure service supervision restarts crashed worker processes safely.
- Monitor web and ModSecurity logs for parser errors and worker crashes.
Validation and detection
- Confirm production and staging hosts report ModSecurity 3.0.4 or later.
- Review historical logs for string-index parser errors and worker restarts.
- Check package changelogs for CVE-2019-25043 or equivalent backport notes.
- Verify web traffic continues through ModSecurity after any worker restart.
- Document exposed internet-facing services still running older ModSecurity builds.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-25043 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/SpiderLabs/ModSecurity/issues/2566CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.