Vulnerability Description
An exploitable operating system command injection exists in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04). Specially crafted entries to network configuration information can cause execution of arbitrary system commands, resulting in full control of the device. An attacker can send an authenticated HTTP request to trigger this vulnerability. Data entered into the 'Domain Name' input field through the web portal is submitted to apply.cgi as the value to the 'wan_domain' POST parameter. The wan_domain data goes through the nvram_set process described above. When the 'preinit' binary receives the SIGHUP signal it enters a code path that calls a function named 'set_host_domain_name' from its libshared.so shared object.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linksys | E1200 Firmware | 2.0.09 |
| Linksys | E1200 | - |
| Linksys | E2500 Firmware | 3.0.04 |
| Linksys | E2500 | - |
Related Weaknesses (CWE)
References
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625ExploitThird Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625ExploitThird Party Advisory
FAQ
What is CVE-2018-3955?
CVE-2018-3955 is a vulnerability with a CVSS score of 7.2 (HIGH). An exploitable operating system command injection exists in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04). Specially crafted ent...
How severe is CVE-2018-3955?
CVE-2018-3955 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-3955?
Check the references section above for vendor advisories and patch information. Affected products include: Linksys E1200 Firmware, Linksys E1200, Linksys E2500 Firmware, Linksys E2500.