Security readout for executives and security teams
Plain-English summary
GNU LibreDWG through 0.9.3 can read past heap memory when handling crafted input. Business risk depends on whether LibreDWG processes untrusted DWG-related files in your environment. The sources provide no CVSS score and no confirmed active exploitation.
Executive priority
Treat this as a targeted dependency exposure check, not a broad emergency. Prioritize environments that ingest outside CAD files or operate automated DWG processing services. Lack of severity scoring means validation should precede escalation.
Technical view
CVE-2019-20915 is a heap-based buffer over-read in bit_write_TF in bits.c in GNU LibreDWG through 0.9.3. The trigger is crafted input. Public references include an upstream issue and commit, but the CVE metadata does not provide CWE, CVSS, or downstream product details.
Likely exposure
Exposure is most likely where GNU LibreDWG through 0.9.3 is installed or embedded in workflows that parse, convert, or write DWG data, especially from external users. The provided affected metadata is nonspecific and does not identify downstream products.
Exploitation context
The CVE says crafted input can trigger the over-read. CISA KEV status is false in the supplied bundle, and no cited source confirms active exploitation. Evidence is insufficient to claim remote code execution or weaponized exploitation.
Researcher notes
The record lacks CVSS, CWE, and precise affected CPEs. Do not infer broader product impact from the placeholder affected metadata. Focus analysis on bit_write_TF in bits.c, versions through 0.9.3, and whether vendor packages backported the referenced change.
Mitigation direction
- Identify GNU LibreDWG installations and embedded dependencies through version 0.9.3.
- Review upstream LibreDWG guidance and the referenced commit before applying fixes.
- Restrict untrusted DWG processing until affected components are updated or isolated.
- Run file-processing services with least privilege and containment where feasible.
Validation and detection
- Confirm installed LibreDWG versions and package backport status.
- Map applications that accept DWG or CAD input from external users.
- Review the upstream issue and commit for the exact fixed code path.
- After updating, regression test DWG parsing and conversion workflows.
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-2019-20915 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/95cc9300430d35feb05b06a9badf678419463dbeCVE 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.