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CVE Record

CVE-2020-21827: A heap based buffer overflow vulnerability exists in GNU LibreDWG 0.10 via read_2004_compressed_section ../...

A heap based buffer overflow vulnerability exists in GNU LibreDWG 0.10 via read_2004_compressed_section ../../src/decode.c:2379.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This CVE concerns a memory corruption flaw in GNU LibreDWG 0.10, a library/tooling stack for DWG file handling. Business urgency depends on whether the organization processes DWG files, especially files from customers, partners, uploads, or email attachments. The sources do not provide a CVSS score, patch version, or confirmed impact.

Executive priority

Prioritize inventory first. If LibreDWG 0.10 processes external DWG files in production, treat remediation as time-sensitive. If usage is limited to internal trusted files, monitor vendor guidance and schedule normal patching.

Technical view

CVE-2020-21827 describes a heap-based buffer overflow in GNU LibreDWG 0.10's read_2004_compressed_section function at src/decode.c:2379. CWE-122 indicates heap memory can be overwritten. The bundle does not provide CPEs, CVSS, exploit details, confirmed code execution, or remediation status.

Likely exposure

Exposure is most likely in systems using GNU LibreDWG 0.10 to parse DWG files. Higher concern applies to automated conversion, indexing, preview, or import services that handle untrusted CAD files. The source bundle lists affected product metadata as n/a, so inventory confirmation is required.

Exploitation context

No active exploitation is stated in the provided sources, and the CVE is not listed as KEV in the bundle. The available evidence identifies the bug class and location only. Treat exploitability and impact as unconfirmed unless vendor or researcher material provides more detail.

Researcher notes

The public description is sparse: function name, source location, version, and CWE class are available, but not triggering conditions, exploitability, CVSS, fixed release, or affected CPEs. Avoid assuming code execution or broad product exposure without confirming upstream details.

Mitigation direction

  • Identify any use of GNU LibreDWG 0.10 in applications and build pipelines.
  • Check LibreDWG vendor or project guidance for fixed versions or patches.
  • Avoid processing untrusted DWG files with affected deployments until assessed.
  • Isolate file-conversion services that depend on LibreDWG.
  • Apply memory-safety hardening where rebuilds are required.

Validation and detection

  • Search SBOMs, package manifests, and containers for LibreDWG 0.10.
  • Confirm whether any service accepts externally supplied DWG files.
  • Review crash logs for LibreDWG parsing failures around DWG 2004 content.
  • Check upstream issue 183 for remediation or maintainer status.
  • Document compensating controls for any remaining affected parser paths.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
1ADP providers
3Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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