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CVE Record

CVE-2018-1000205: U-Boot contains a CWE-20: Improper Input Validation vulnerability in Verified boot signature validation tha...

U-Boot contains a CWE-20: Improper Input Validation vulnerability in Verified boot signature validation that can result in Bypass verified boot. This attack appear to be exploitable via Specially crafted FIT image and special device memory functionality.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a boot-chain trust issue in U-Boot. A specially crafted FIT image may bypass verified boot, allowing untrusted firmware or software to boot on devices that rely on U-Boot signature validation. Sources do not identify affected versions, vendors, scoring, or confirmed exploitation, so urgency depends on whether your products use this boot path.

Executive priority

Treat this as a firmware trust-risk triage item, not a confirmed emergency from the supplied evidence. Give higher priority to products where U-Boot enforces secure boot and attackers can access update, recovery, or removable boot paths.

Technical view

CVE-2018-1000205 describes improper input validation in U-Boot verified boot signature validation. The stated impact is bypass of verified boot via a specially crafted FIT image and special device memory functionality. The provided records lack CVSS, affected version ranges, product mappings, and a named fixed release.

Likely exposure

Exposure is likely limited to embedded, appliance, IoT, or platform firmware builds using U-Boot verified boot with FIT images. The source bundle does not identify specific vendors, products, versions, or CPEs, so asset inventory and firmware provenance are required.

Exploitation context

The CVE says exploitation requires a specially crafted FIT image and special device memory functionality. KEV is false, and the supplied sources do not report active exploitation, public weaponization, or exploitation in the wild.

Researcher notes

Evidence is incomplete: no CVSS vector, no affected version list, and no explicit fixed release appears in the bundle. The issue is still security-significant because verified boot bypass can undermine platform integrity below the operating system.

Mitigation direction

  • Check DENX/U-Boot and device-vendor guidance for affected versions and fixes.
  • Inventory products and firmware images that use U-Boot verified boot and FIT images.
  • Prioritize devices where attackers can influence boot media, firmware updates, or recovery images.
  • Restrict firmware update and boot-image distribution to trusted, authenticated channels.
  • Review vendor BSPs and downstream forks for related U-Boot security patches.

Validation and detection

  • Identify firmware builds containing U-Boot and verified boot support.
  • Confirm whether FIT images are used in the boot chain.
  • Map installed U-Boot versions to vendor or maintainer advisories.
  • Check whether device memory functionality in the CVE description is available.
  • Validate in a lab that unsigned or unexpected boot images are rejected.
Prepared
Confidence
medium
Sources
4

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

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

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CVE-2018-1000205 mapping review

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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
3Source 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

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.