CVE intelligence and bounded remediation

CVE-2020-8332 — Lenovo Bladecenter Hs23 Firmware security vulnerability

Medium CVSS 6.9

A potential vulnerability in the SMI callback function used in the legacy BIOS mode USB drivers in some legacy Lenovo and IBM System x servers may allow arbitrary code execution. Servers operating in UEFI mode are not affected.

Severity
Medium
CVSS
6.9 (2.0)
Published
2020-10-14
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-367

Affected products

  • lenovo / bladecenter_hs23_firmware
  • lenovo / bladecenter_hs23e_firmware
  • lenovo / compute_node-x440_firmware
  • lenovo / flex_system_x220_firmware
  • lenovo / flex_system_x240_firmware
  • lenovo / flex_system_x440_firmware

Showing 6 representative product identities from 19 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

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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

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