Security readout for executives and security teams
Plain-English summary
CVE-2019-20912 is a file-processing flaw in GNU LibreDWG through 0.9.3. A specially crafted input file can trigger a stack overflow, likely causing the parser or application using it to crash. Business urgency depends on whether untrusted DWG files are processed.
Executive priority
Prioritize this where LibreDWG processes external DWG files or supports customer-facing ingestion. If LibreDWG is absent or only used on trusted files, urgency is lower, but version verification should still be completed.
Technical view
The CVE describes crafted input causing a stack overflow in LibreDWG bits.c, possibly related to bit_read_TF. The bundle does not provide CVSS, CWE, affected CPEs, or a named fixed release. An upstream issue and commit are referenced as primary technical evidence.
Likely exposure
Exposure is likely limited to systems, services, or desktop workflows using GNU LibreDWG through 0.9.3 to parse DWG content, especially files from external users, uploads, email attachments, or automated conversion pipelines.
Exploitation context
The sources do not indicate active exploitation, and the CVE is not marked KEV. The realistic scenario is malformed DWG input reaching LibreDWG and causing denial of service or potentially memory-safety impact, but details are incomplete.
Researcher notes
Evidence is sparse: the CVE states stack overflow in bits.c and references GitHub issue 178 plus commit b84c2cab55948a5ee70860779b2640913e3ee1ed. No CVSS vector, CWE, exploit status, or fixed release mapping is included in the provided bundle.
Mitigation direction
- Inventory all LibreDWG installations and embedded uses.
- Check whether deployed versions are through 0.9.3.
- Review upstream LibreDWG guidance and the referenced commit.
- Upgrade to a maintained release containing the fix, if available.
- Restrict untrusted DWG processing until remediation is confirmed.
- Run DWG parsing in isolated, least-privilege environments.
Validation and detection
- Confirm package versions on servers, workstations, and build images.
- Identify applications or scripts that call LibreDWG libraries or tools.
- Review file-ingestion paths for untrusted DWG content.
- Verify remediation by mapping deployed code to the referenced upstream fix.
- Check crash reports or logs for LibreDWG parsing failures.
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
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CVE-2019-20912 mapping review
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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/b84c2cab55948a5ee70860779b2640913e3ee1edCVE 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.