Security readout for executives and security teams
Plain-English summary
LibreDWG versions through 0.9.3 can read past a heap buffer when processing crafted input. The main business concern is systems that automatically handle DWG/CAD files from outside parties. The public sources do not provide CVSS scoring or evidence of active exploitation.
Executive priority
Treat as a targeted remediation item for environments processing external CAD files. It is not supported as emergency-active exploitation, but untrusted file ingestion can create business risk if the vulnerable library is embedded in automated workflows.
Technical view
CVE-2019-20913 is a heap-based buffer over-read in GNU LibreDWG's dwg_encode_entity logic in common_entity_data.spec. The CVE description names crafted input as the trigger and versions through 0.9.3 as affected. Public metadata does not include CWE, CVSS, CPE, or a detailed impact statement.
Likely exposure
Exposure is most likely in applications, services, or pipelines embedding LibreDWG through 0.9.3 to parse, convert, inspect, or encode DWG files, especially where files come from customers, partners, email, uploads, or shared repositories.
Exploitation context
The source bundle supports a crafted-input vulnerability, but not active exploitation. CISA KEV is false, and the cited metadata does not establish public exploit availability, remote reachability, or impact beyond the heap buffer over-read condition.
Researcher notes
Evidence is sparse: CVSS, CWE, CPE, exploit status, and full impact are not provided in the bundle. Analysis should stay tied to LibreDWG through 0.9.3, crafted input, heap over-read, issue 178, and commit 3f503dd.
Mitigation direction
- Inventory LibreDWG use across CAD, conversion, and file-processing services.
- Check whether installed LibreDWG versions are through 0.9.3.
- Review the referenced upstream commit and vendor release guidance.
- Restrict untrusted DWG processing until fixed builds are confirmed.
- Run file parsers with least privilege and process isolation.
Validation and detection
- Confirm LibreDWG package versions on affected hosts and containers.
- Map which workflows accept DWG files from external sources.
- Verify whether the referenced upstream fix is present in deployed code.
- Review crash reports or sanitizer findings involving dwg_encode_entity.
- Document compensating controls for unpatched processing paths.
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-2019-20913 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/LibreDWG/libredwg/issues/178CVE reference · x_refsource_MISC
- https://github.com/LibreDWG/libredwg/commit/3f503dd294efc63a59608d8a16058c41d44ba13aCVE 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.