Security readout for executives and security teams
Plain-English summary
CVE-2018-13871 is a memory safety flaw in HDF5 1.8.20. If a business system parses HDF5 files, especially files from users, partners, or automated data feeds, a crafted file could crash the parser or potentially affect process memory. The sources do not provide a CVSS score, vendor fix details, or confirmed active exploitation.
Executive priority
Prioritize if HDF5 file parsing is part of customer uploads, research data intake, or automated partner feeds. If HDF5 is unused or only processes trusted internal files, urgency is lower, but version inventory should still be completed.
Technical view
The CVE describes a heap-based buffer overflow in HDF HDF5 1.8.20, specifically in H5FL_blk_malloc in H5FL.c. The provided reference is a public proof-of-concept repository, but the bundle does not establish exploitability beyond the reported overflow or identify downstream affected applications.
Likely exposure
Exposure is most likely in applications, scientific workflows, analytics services, or pipelines that use HDF5 1.8.20 to open HDF5 files. Risk is higher where files are accepted from untrusted sources. Internet exposure depends on whether an application offers HDF5 upload or parsing.
Exploitation context
The source bundle includes a public PoC reference, but CISA KEV is false and no cited source confirms active exploitation. The available evidence supports concern for malformed-file handling, not a claim of real-world exploitation.
Researcher notes
Evidence is sparse: the CVE names the vulnerable function and version, and cites a PoC repository. The bundle lacks CVSS, CWE, fixed-version, advisory, and exploit-in-the-wild details. Validate impact against the specific application and file ingestion path.
Mitigation direction
- Inventory systems and containers using HDF5 1.8.20.
- Check HDF Group or application vendor guidance for fixed versions.
- Avoid processing untrusted HDF5 files until exposure is resolved.
- Run HDF5 parsing in least-privileged, isolated environments.
- Apply vendor updates where available.
Validation and detection
- Search software bills of materials for HDF5 1.8.20.
- Identify services that accept or ingest HDF5 files.
- Confirm whether parsing happens on user-controlled input.
- Review crash reports involving HDF5 file handling.
- Document compensating controls around file ingestion.
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-2018-13871 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/TeamSeri0us/pocs/tree/master/hdf5CVE 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.