Security readout for executives and security teams
Plain-English summary
CVE-2020-23879 is a crash bug in pdf2json v0.71. A specially malformed PDF may cause the parser to hit a NULL pointer dereference, disrupting any service that relies on this component to process PDFs.
Executive priority
Prioritize remediation if PDF processing is internet-facing or business-critical. Otherwise, treat as a targeted availability risk and track vendor guidance before broader rollout.
Technical view
The CVE describes a NULL pointer dereference in ObjectStream::getObject in pdf2json v0.71. The available sources do not provide CVSS, CWE, affected CPEs, patch status, or evidence beyond the CVE text and linked public references.
Likely exposure
Exposure is most likely where pdf2json v0.71 processes untrusted or user-supplied PDF files, especially in web upload, document conversion, scanning, or ingestion workflows.
Exploitation context
The source bundle links a public PoC repository and a GitHub issue. CISA KEV is false, and no provided source confirms active exploitation in the wild.
Researcher notes
The record is sparse: no CVSS, CWE, CPE, or named patch is present in the source bundle. Analysis should stay limited to denial-of-service style impact unless new vendor evidence expands scope.
Mitigation direction
- Inventory systems and dependencies for pdf2json v0.71.
- Check the upstream project issue for fixed versions or maintainer guidance.
- Avoid processing untrusted PDFs with the affected version where possible.
- Run PDF conversion in an isolated worker with crash recovery.
- Apply input limits and monitoring around PDF ingestion services.
Validation and detection
- Search dependency manifests and container images for pdf2json v0.71.
- Confirm whether any public route accepts PDFs for parsing or conversion.
- Review crash logs for NULL dereference or parser termination events.
- Validate staging behavior with a safe malformed-PDF regression corpus.
- Document any compensating controls for isolated PDF 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-2020-23879 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/Aurorainfinity/Poc/tree/master/pdf2jsonCVE reference · x_refsource_MISC
- https://github.com/flexpaper/pdf2json/issues/44CVE 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.