CVE intelligence and bounded remediation

CVE-2020-4682 — Ibm Mq security vulnerability

Critical CVSS 9.8

IBM MQ 7.5, 8.0, 9.0, 9.1, 9.2 LTS, and 9.2 CD could allow a remote attacker to execute arbitrary code on the system, caused by an unsafe deserialization of trusted data. An attacker could exploit this vulnerability to execute arbitrary code on the system. IBM X-Force ID: 186509.

Severity
Critical
CVSS
9.8 (3.1)
Published
2021-01-28
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-502

Affected products

  • ibm / mq / 8.0.0.0
  • ibm / mq / 8.0.0.1
  • ibm / mq / 8.0.0.2
  • ibm / mq / 8.0.0.3
  • ibm / mq / 8.0.0.4
  • ibm / mq / 8.0.0.5

Showing 6 representative product identities from 47 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Unsafe deserialization and object reconstruction

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Check exposure

  • Inventory serialization formats accepted from requests, queues, caches, files, cookies, and cross-service messages.
  • Trace whether untrusted input can select classes, types, callbacks, constructors, or object hooks during decoding.
  • Identify signing, schema validation, trust-boundary, and compatibility settings for each decoder.

Remediate safely

  • Replace native object deserialization with a data-only format and explicit schema validation.
  • If replacement is not immediate, use a safe decoder with a minimal type allowlist and disable polymorphic or executable hooks.
  • Update the affected library and add inert tests for unknown types, extra fields, malformed nesting, and unsigned data.

Authoritative sources

Complete CVE record and remediation plan

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