CVE-2018-3954 — HIGH (7.2) — White Hats Nepal

Vulnerability Description

Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAMData entered into the 'Router Name' input field through the web portal is submitted to apply.cgi as the value to the 'machine_name' POST parameter. 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

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

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)

CWE-78

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-2018-3954?

CVE-2018-3954 is a vulnerability with a CVSS score of 7.2 (HIGH). Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper...

How severe is CVE-2018-3954?

CVE-2018-3954 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-2018-3954?

Check the references section above for vendor advisories and patch information. Affected products include: Linksys E1200 Firmware, Linksys E1200, Linksys E2500 Firmware, Linksys E2500.