Security readout for executives and security teams
Plain-English summary
CVE-2019-20007 is a crash flaw in ezXML 0.8.2 through 0.8.6. A specially crafted XML file can trigger a NULL pointer dereference while parsing, causing the affected process to segfault. The main business concern is availability loss in software that accepts untrusted XML through ezXML.
Executive priority
Handle as a targeted availability issue. It is not documented as actively exploited, but exposed XML parsing in critical services could allow avoidable outages. Prioritize discovery first, then fix or isolate any untrusted parsing path.
Technical view
In ezxml.c, ezxml_str2utf8 can perform a zero-length reallocation while parsing crafted XML and may return NULL on some compilers. ezxml_parse_str then fails to validate the s pointer before use, causing a NULL pointer dereference and process crash.
Likely exposure
Exposure is most likely in applications or embedded components that use ezXML 0.8.2 through 0.8.6 to parse XML supplied by users, integrations, files, or network services. The bundle does not identify specific downstream products.
Exploitation context
The sources describe a crafted XML input causing a crash. They do not cite public active exploitation, and the CVE is not listed as KEV in the provided bundle. Treat this as a denial-of-service risk, not proven remote code execution.
Researcher notes
Evidence is limited to the CVE description and SourceForge bug reference. The root condition is parser error handling after a possible NULL result from zero-length reallocation. No CVSS, CWE, patch details, or downstream affected products are provided.
Mitigation direction
- Inventory applications and firmware that embed ezXML 0.8.2 through 0.8.6.
- Check ezXML project guidance; the provided sources do not name a fixed version.
- Restrict untrusted XML ingestion where ezXML parsing is exposed.
- Add input handling safeguards around XML parsing failures.
- Prioritize remediation for internet-facing or business-critical XML processing paths.
Validation and detection
- Search dependency records and source trees for ezXML usage and version references.
- Identify whether XML parsed by ezXML can come from untrusted sources.
- Review parser call sites for NULL handling and crash containment.
- Run controlled regression tests for malformed XML handling without exposing production systems.
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-2019-20007 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://sourceforge.net/p/ezxml/bugs/13/CVE 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.