CVE-2016-11021
Published: 09 March 2020
Summary
CVE-2016-11021 is a high-severity OS Command Injection (CWE-78) vulnerability in Dlink Dcs-930L Firmware. Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 0.4% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2016-11021 is an OS command injection vulnerability (CWE-78) affecting the setSystemCommand function on D-Link DCS-930L network cameras running firmware versions prior to 2.12. The flaw resides in the handling of the SystemCommand parameter, which is passed directly to the underlying operating system without proper sanitization.
A remote attacker who has obtained administrative credentials can supply arbitrary OS commands through this parameter over the network. Successful exploitation grants the ability to execute code with full privileges on the device, resulting in complete control over confidentiality, integrity, and availability of the camera.
Public exploit code has been available since at least 2015, and the vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, confirming observed in-the-wild use. Upgrading to firmware version 2.12 or later removes the affected setSystemCommand interface.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2016-2012
Vulnerability details
setSystemCommand on D-Link DCS-930L devices before 2.12 allows a remote attacker to execute code via an OS command in the SystemCommand parameter.
- CWE(s)
- KEV Date Added
- 25 March 2022
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires validation and sanitization of the SystemCommand parameter to block arbitrary OS command injection before execution.
Mandates timely application of the firmware update to 2.12+ that removes the vulnerable setSystemCommand interface.
Enforces least functionality by disabling or restricting dangerous administrative interfaces such as setSystemCommand on exposed devices.