CVE-2018-6211: Command Injection
First published: Wed Jun 20 2018(Updated: )
On D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7, 1.4.0, and 2.0.22, OS command injection is possible as a result of incorrect processing of the res_buf parameter to index.cgi.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| D-Link DIR-620 Firmware | =1.0.3 | |
| D-Link DIR-620 Firmware | =1.0.37 | |
| D-Link DIR-620 Firmware | =1.3.1 | |
| D-Link DIR-620 Firmware | =1.3.3 | |
| D-Link DIR-620 Firmware | =1.3.7 | |
| D-Link DIR-620 Firmware | =1.4.0 | |
| D-Link DIR-620 Firmware | =2.0.22 | |
| dlink DIR-620 firmware |
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Reference Links
- http://www.securitynewspaper.com/2018/05/25/d-link-dir-620-routers-critical-vulnerabilities/
- https://securelist.com/backdoors-in-d-links-backyard/85530/
- https://securityaffairs.co/wordpress/72839/hacking/d-link-dir-620-flaws.html
- https://www.bleepingcomputer.com/news/security/backdoor-account-found-in-d-link-dir-620-routers/
Frequently Asked Questions
What is the severity of CVE-2018-6211?
CVE-2018-6211 has been classified as a critical vulnerability due to the potential for OS command injection that allows unauthorized execution of commands.
How do I fix CVE-2018-6211?
To fix CVE-2018-6211, update the D-Link DIR-620 firmware to the latest version provided by the manufacturer.
What devices are affected by CVE-2018-6211?
CVE-2018-6211 affects D-Link DIR-620 devices running customized firmware versions 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7, 1.4.0, and 2.0.22.
What kind of attack can be executed through CVE-2018-6211?
CVE-2018-6211 can be exploited to perform OS command injection attacks, allowing attackers to execute arbitrary commands on the affected devices.
Is there a workaround for CVE-2018-6211?
There is no known workaround for CVE-2018-6211; upgrading the firmware is the only mitigation available.
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- version/d-link dir-620 firmware/1.4.0
- version/d-link dir-620 firmware/2.0.22
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