Security readout for executives and security teams
Plain-English summary
Apache Hadoop’s native libhdfs library may mishandle user-provided file paths, causing a heap buffer overflow. The reported outcomes are denial of service or arbitrary code execution. Organizations running affected Hadoop versions should prioritize upgrades, especially where applications pass externally influenced paths into HDFS operations.
Executive priority
Treat this as a high-priority upgrade for Hadoop environments because the stated impact includes service outage and possible code execution. Urgency is highest for multi-user, internet-adjacent, or data-platform workloads where untrusted file paths may reach Hadoop native code.
Technical view
CVE-2021-37404 is a CWE-787 heap buffer overflow in Apache Hadoop libhdfs native code. The issue is triggered by opening a user-provided file path without validation. Affected ranges include Hadoop 2.9.0-2.10.1, 3.0.0-3.1.4, 3.2.0-3.2.2, and 3.3.0-3.3.1.
Likely exposure
Exposure is most likely in Hadoop deployments or downstream products using the native libhdfs library in the affected version ranges. Risk is higher where services accept tenant, user, job, or application-controlled file paths and pass them to libhdfs.
Exploitation context
The source bundle does not show CISA KEV listing, public exploitation, or exploit maturity. The disclosed impact includes denial of service and arbitrary code execution, but no exploit steps or active attack evidence are provided.
Researcher notes
No CVSS vector is present in the supplied bundle. Analysis should focus on affected version confirmation, libhdfs usage, and path-control boundaries. Avoid assuming downstream product exposure unless a vendor advisory explicitly confirms it.
Mitigation direction
- Upgrade Apache Hadoop to 2.10.2, 3.2.3, 3.3.2, or later.
- Check vendor advisories for products bundling or embedding Apache Hadoop libhdfs.
- Prioritize systems accepting user-controlled HDFS file paths.
- Reduce untrusted path input until upgrades are complete.
Validation and detection
- Inventory Hadoop versions across clusters, clients, and application images.
- Confirm whether applications load or link the native libhdfs library.
- Identify workflows passing user-controlled paths into HDFS open operations.
- Verify upgraded deployments report Hadoop 2.10.2, 3.2.3, 3.3.2, or later.
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.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-37404 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://lists.apache.org/thread/2h56ztcj3ojc66qzf1nno88vjw9vd4woCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220715-0007/CVE reference · x_refsource_CONFIRM
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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.