Vulnerability Monitor

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CVE-2016-20009

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

Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 15 products from windriver, from siemens, from siemens and 12 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-03-11T22:15:12.120

Last Modified

2024-11-21T02:47:32.740

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	windriver	vxworks	≤ 7.0	Yes
Operating System	siemens	sgt-100_firmware	*	Yes
Hardware	siemens	sgt-100	-	No
Operating System	siemens	sgt-200_firmware	*	Yes
Hardware	siemens	sgt-200	-	No
Operating System	siemens	sgt-300_firmware	*	Yes
Hardware	siemens	sgt-300	-	No
Operating System	siemens	sgt-400_firmware	*	Yes
Hardware	siemens	sgt-400	-	No
Operating System	siemens	sgt-a20_firmware	*	Yes
Hardware	siemens	sgt-a20	-	No
Operating System	siemens	sgt-a35_firmware	*	Yes
Hardware	siemens	sgt-a35	-	No
Operating System	siemens	sgt-a65_firmware	*	Yes
Hardware	siemens	sgt-a65	-	No

References

https://blog.exodusintel.com/2016/08/09/vxworks-execute-my-packets/ Exploit, Third Party Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-553445.pdf Third Party Advisory ([email protected])
https://blog.exodusintel.com/2016/08/09/vxworks-execute-my-packets/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-553445.pdf Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For windriver's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.