CVE-2019-20216: OS Command Injection
First published: Wed Jan 29 2020(Updated: )
D-Link DIR-859 1.05 and 1.06B01 Beta01 devices allow remote attackers to execute arbitrary OS commands via the urn: to the M-SEARCH method in ssdpcgi() in /htdocs/cgibin, because REMOTE_PORT is mishandled. The value of the urn: service/device is checked with the strstr function, which allows an attacker to concatenate arbitrary commands separated by shell metacharacters.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Dlink Dir-859 Firmware | =1.05 | |
| Dlink Dir-859 Firmware | =1.06b01-beta01 | |
| Dlink Dir-859 |
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Reference Links
- https://medium.com/@s1kr10s/d-link-dir-859-rce-unauthenticated-cve-2019-20216-cve-2019-20217-en-6bca043500ae
- https://medium.com/@s1kr10s/d-link-dir-859-rce-unauthenticated-cve-2019-20216-cve-2019-20217-es-e11ca6168d35
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147
- https://medium.com/%40s1kr10s/d-link-dir-859-rce-unauthenticated-cve-2019-20216-cve-2019-20217-en-6bca043500ae
- https://medium.com/%40s1kr10s/d-link-dir-859-rce-unauthenticated-cve-2019-20216-cve-2019-20217-es-e11ca6168d35
Frequently Asked Questions
What is the severity of CVE-2019-20216?
The severity of CVE-2019-20216 is critical with a CVSS score of 9.8 out of 10.
How can remote attackers exploit CVE-2019-20216?
Remote attackers can exploit CVE-2019-20216 by sending a specially-crafted request to the ssdpcgi() function in /htdocs/cgibin using the M-SEARCH method.
Which D-Link devices are affected by CVE-2019-20216?
D-Link DIR-859 firmware versions 1.05 and 1.06B01 Beta01 are affected by CVE-2019-20216.
Is there a fix available for CVE-2019-20216?
Yes, D-Link has released a security announcement with instructions on how to mitigate the vulnerability. It is recommended to update to the latest firmware version.
What is the Common Weakness Enumeration (CWE) ID for CVE-2019-20216?
The CWE ID for CVE-2019-20216 is 78, which indicates Improper Neutralization of Special Elements used in an OS Command (OS Command Injection).
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