CVE intelligence and bounded remediation

CVE-2020-4387 — Ibm Db2 security vulnerability

Medium CVSS 6.2

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow a local user to obtain sensitive information using a race condition of a symbolic link. IBM X-Force ID: 179269.

Severity
Medium
CVSS
6.2 (3.0)
Published
2020-07-01
CISA KEV
Not currently listed
Ecosystem
windows/system
Weaknesses
CWE-362

Affected products

  • ibm / db2 / 9.7.0.0
  • ibm / db2 / 10.1.0.0
  • ibm / db2 / 10.5.0.0
  • ibm / db2 / 11.1.0.0
  • ibm / db2 / 11.5.0.0

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
  • Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
  • Identify clustered and multi-process behavior that repository-local tests may not represent.

Remediate safely

  • Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
  • Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
  • Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.