Is CVE-2019-14203 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2019-14203 being exploited in the wild.

How severe is CVE-2019-14203?

Critical severity, with a CVSS score of 9.8, published 31 July 2019.

Is there a fix for CVE-2019-14203?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2019-14203 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2019-14203?

Check whether you run Denx U-Boot or Siemens ROX II at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2019-14203: Das U-Boot stack overflow in nfs_mount_reply

CVE-2019-14203 · Severity: critical · CVSS 9.8 · Published 2019-07-31

A critical vulnerability exists in U-Boot, a widely used bootloader for embedded devices and industrial hardware. An attacker could exploit this flaw to gain full control over a device during its startup process by sending malicious network traffic. This could lead to permanent device compromise, data theft, or complete operational shutdown of industrial equipment.

Technologies: Denx U-Boot, Siemens ROX II. Vendors: Denx, Siemens.

Quick answers

Is CVE-2019-14203 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2019-14203 being exploited in the wild.
How severe is CVE-2019-14203?: Critical severity, with a CVSS score of 9.8, published 31 July 2019.
Which products and versions are affected?: Siemens ROX II before V2.17.1.
Is there a fix for CVE-2019-14203?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2019-14203 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2019-14203?: Check whether you run Denx U-Boot or Siemens ROX II at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow vulnerability exists in Das U-Boot through version 2019.07 within the nfs_mount_reply helper function of the nfs_handler. The flaw is triggered by insufficient validation of data lengths in incoming Network File System (NFS) mount replies. A remote, unauthenticated attacker on the same network can exploit this by sending a malicious NFS packet to a device attempting to boot over the network. Successful exploitation can lead to arbitrary code execution with the privileges of the bootloader, effectively compromising the entire system before the operating system even starts. Siemens has confirmed this affects Ruggedcom Rox II devices, and patches are available in version 2.17.1.

Affected products

Das U-Boot U-Boot through 2019.07
Siemens Corproation Ruggedcom Rox II family before V2.17.1

Timeline

2019-07-31: disclosed
2019-07-31: advisory: NVD published date
2026-05-12: advisory: Siemens published updated advisory for Ruggedcom products

References

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