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CVE Record

CVE-2019-14203: An issue was discovered in Das U-Boot through 2019.07.

An issue was discovered in Das U-Boot through 2019.07. There is a stack-based buffer overflow in this nfs_handler reply helper function: nfs_mount_reply.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2019-14203 is a stack-based buffer overflow in Das U-Boot through version 2019.07. It is tied to NFS boot reply handling, so exposure is most relevant to embedded or industrial devices that use U-Boot and network boot paths. The bundle does not provide CVSS, confirmed exploit activity, or a universal vendor fix.

Executive priority

Prioritize asset discovery first. This is potentially serious for exposed embedded systems, but urgency depends on whether affected U-Boot firmware and NFS boot paths exist in your environment.

Technical view

The reported flaw is in U-Boot's nfs_mount_reply helper, used during NFS handling. A malformed or unexpected NFS mount reply can overflow stack memory. Source evidence identifies U-Boot through 2019.07, but affected downstream device firmware and exact remediation status must be determined from vendor advisories.

Likely exposure

Likely exposure is embedded, appliance, or industrial systems whose boot firmware includes Das U-Boot through 2019.07 and has NFS boot or related network boot functionality reachable on a relevant network.

Exploitation context

The CVE bundle does not list CISA KEV status or confirmed active exploitation. The Semmle reference characterizes this as an NFS remote-code-execution vulnerability, but the provided data does not include exploit prevalence or weaponization evidence.

Researcher notes

Evidence is incomplete for scoring and downstream product impact. Treat this as a bootloader NFS parsing flaw requiring firmware-level validation, not a generic application vulnerability. Avoid assuming all U-Boot devices are exposed without confirming version, configuration, and network reachability.

Mitigation direction

  • Inventory devices and firmware that include Das U-Boot through 2019.07.
  • Check device-vendor advisories, starting with Siemens where applicable.
  • Update affected firmware when vendor guidance provides a corrected release.
  • Restrict NFS and network-boot traffic to trusted management networks.
  • Disable NFS boot paths where they are not operationally required.

Validation and detection

  • Identify U-Boot versions in device firmware bills of materials or boot logs.
  • Confirm whether NFS boot or U-Boot network boot is enabled.
  • Review network paths that can reach boot-time NFS services.
  • Map affected products to vendor advisories before declaring remediation complete.
  • Document compensating controls where firmware updates are unavailable.
Prepared
Confidence
medium
Sources
5

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-2019-14203 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
3Timeline events
2ADP providers
4Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
siemens-SADPADP container

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.