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CVE-2021-45927: MDB Tools (aka mdbtools) 0.9.2 has a stack-based buffer overflow (at 0x7ffd6e029ee0) in mdb_numeric_to_stri...

MDB Tools (aka mdbtools) 0.9.2 has a stack-based buffer overflow (at 0x7ffd6e029ee0) in mdb_numeric_to_string (called from mdb_xfer_bound_data and _mdb_attempt_bind).

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

MDB Tools 0.9.2 has a stack-based buffer overflow in code that converts numeric database values. Organizations are most exposed where MDB Tools processes Microsoft Access database files from users, partners, or automated pipelines. Public sources provided do not show active exploitation or a CVSS score.

Executive priority

Treat this as a targeted remediation item, not an emergency, unless MDB files from external parties are processed automatically. Prioritize systems where MDB Tools runs in business-critical ingestion or reporting pipelines.

Technical view

CVE-2021-45927 is a stack-based buffer overflow in mdb_numeric_to_string, reached through mdb_xfer_bound_data and _mdb_attempt_bind in MDB Tools 0.9.2. The record references an upstream commit, OSS-Fuzz issue data, and a Gentoo advisory, but the provided bundle does not include detailed exploitability or fixed-version text.

Likely exposure

Exposure is most likely on Linux or Unix systems with mdbtools installed, especially ETL, reporting, import, forensic, or data-conversion workflows that parse MDB files. Internet exposure is not indicated by the provided sources.

Exploitation context

The source bundle does not indicate known active exploitation, and the CVE is not listed as KEV. OSS-Fuzz references suggest the issue was found through fuzzing, but provided evidence does not establish real-world exploitation.

Researcher notes

Evidence is limited to the CVE description, upstream commit reference, OSS-Fuzz records, and Gentoo advisory. The bundle supports a stack overflow in MDB Tools 0.9.2, but not active exploitation, CVSS scoring, affected downstream versions, or confirmed impact beyond memory corruption risk.

Mitigation direction

  • Identify systems running MDB Tools or mdbtools 0.9.2.
  • Apply upstream or distribution updates referenced by vendor guidance.
  • Follow Gentoo GLSA-202208-12 where Gentoo systems are affected.
  • Restrict processing of untrusted MDB files until remediation is complete.
  • Run MDB parsing jobs with least privilege and isolation.

Validation and detection

  • Inventory installed mdbtools package versions across servers and build images.
  • Check whether workflows accept MDB files from untrusted sources.
  • Confirm package updates include the referenced upstream fix.
  • Review pipeline logs for crashes during MDB import or export jobs.
  • Track vendor advisories for exact fixed versions in your distributions.
Prepared
Confidence
medium
Sources
6

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
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

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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