Cyber Resilience

CVE-2016-20009

CriticalPublic PoC

Published: 11 March 2021

Published
11 March 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0042 62.2th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2016-20009 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Windriver Vxworks. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 37.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

windriver
vxworks
6.5 — 7.0
siemens
sgt-100 firmware
all versions
siemens
sgt-200 firmware
all versions
siemens
sgt-300 firmware
all versions
siemens
sgt-400 firmware
all versions
siemens
sgt-a20 firmware
all versions
siemens
sgt-a35 firmware
all versions
siemens
sgt-a65 firmware
all versions

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References