Security readout for executives and security teams
Plain-English summary
CVE-2020-21813 is a reported heap buffer overflow in GNU LibreDWG 0.10.2641, in the dwg2SVG text output path. The public record is sparse: no CVSS score, CWE, CPE, confirmed patch, or impact statement is provided. Treat risk as workload-dependent, especially where DWG files from outside parties are converted automatically.
Executive priority
Prioritize review if CAD conversion is internet-facing, automated, or handles customer-supplied DWG files. Otherwise, track as a targeted dependency risk pending clearer vendor remediation data.
Technical view
The CVE description identifies a heap-based buffer overflow in output_TEXT in programs/dwg2SVG.c around line 114 in GNU LibreDWG 0.10.2641. The sources do not document exploit primitives, affected CPEs, fixed versions, or confirmed security impact beyond memory corruption potential.
Likely exposure
Exposure is most likely where LibreDWG 0.10.2641 or dwg2SVG is installed and processes DWG files, especially untrusted CAD uploads, email attachments, vendor submissions, or automated conversion jobs.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Public details are limited to the CVE record and a LibreDWG GitHub issue reference, so exploitation status and real-world weaponization remain unconfirmed.
Researcher notes
The CVE metadata is incomplete: severity, CVSS, CWE, CPE, affected product fields, exploit status, and fix version are not provided. Analysis should stay anchored to GNU LibreDWG 0.10.2641 and dwg2SVG only.
Mitigation direction
- Inventory systems using GNU LibreDWG or dwg2SVG.
- Check upstream LibreDWG guidance for fixed versions or recommended workarounds.
- Avoid processing untrusted DWG files with affected LibreDWG builds.
- Isolate CAD conversion jobs with least privilege and resource limits.
- Monitor conversion services for crashes or memory-safety faults.
Validation and detection
- Confirm whether LibreDWG 0.10.2641 is present in packages or containers.
- Identify workflows that convert DWG files to SVG.
- Review whether DWG inputs come from external or unauthenticated users.
- Compare installed LibreDWG versions against upstream advisories.
- Check logs for dwg2SVG crashes during DWG processing.
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-2020-21813 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.
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572890969CVE reference, mitre
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.