# CVE-2019-14197: Das U-Boot out-of-bounds read in nfs_read_reply

Source: https://junglewise.ai/threats/cve-2019-14197-das-u-boot-out-of-bounds-read-in-nfs-read-reply  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2019-07-31. Updated: 2026-05-12  
License: CC BY 4.0 with a link back

CVE-2019-14197 · Severity: critical · CVSS 9.1 · Published 2019-07-31

A vulnerability was found in U-Boot, a widely used bootloader for embedded devices and industrial hardware. An attacker could exploit this flaw to read sensitive data from the device's memory or cause the system to crash during the network boot process. This could lead to information theft or a complete disruption of industrial operations and device availability.

Technologies: [Denx U-Boot](https://junglewise.ai/threats/technologies/u-boot), [Siemens ROX II](https://junglewise.ai/threats/technologies/rox-ii). Vendors: [Denx](https://junglewise.ai/threats/vendors/denx), [Siemens](https://junglewise.ai/threats/vendors/siemens).

## Quick answers

**Is CVE-2019-14197 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-14197 being exploited in the wild.

**How severe is CVE-2019-14197?** Critical severity, with a CVSS score of 9.1, published 31 July 2019.

**Which products and versions are affected?** Siemens ROX II before 2.17.1.

**Is there a fix for CVE-2019-14197?** 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-2019-14197 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2019-14197?** 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

An out-of-bounds read vulnerability (CWE-125) exists in Das U-Boot through version 2019.07 within the NFS (Network File System) implementation. The flaw is located in the 'nfs_read_reply' function, where insufficient validation of incoming network packets allows for reading data beyond the intended buffer. A remote, unauthenticated attacker on the same network can exploit this by sending malicious NFS replies during the boot process. This can result in a denial of service (system crash) or the exposure of sensitive memory contents. Siemens has also identified this vulnerability as affecting several Ruggedcom Rox II industrial devices, which use U-Boot in their firmware.

## Affected products

- Das U-Boot U-Boot through 2019.07
- Siemens Ruggedcom Rox II family before 2.17.1

## Timeline

- 2019-07-31: disclosed: Initial CVE publication
- 2026-05-12: advisory: Siemens published advisory SSA-577017 regarding Ruggedcom Rox II devices

## References

- [https://blog.semmle.com/uboot-rce-nfs-vulnerability/](https://blog.semmle.com/uboot-rce-nfs-vulnerability/)
- [https://gitlab.com/u-boot/u-boot](https://gitlab.com/u-boot/u-boot)
- [https://cert-portal.siemens.com/productcert/html/ssa-577017.html](https://cert-portal.siemens.com/productcert/html/ssa-577017.html)

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