CVE-2018-3955

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 v3.0 7.2 HIGH
CVSS v2.0 9.0 HIGH

7.2^/10

CVSS v3.0 : HIGH

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

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625	Exploit Third Party Advisory

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:linksys:e1200_firmware:2.0.09:*:*:*:*:*:*:*

cpe:2.3:h:linksys:e1200:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:linksys:e2500_firmware:3.0.04:*:*:*:*:*:*:*

cpe:2.3:h:linksys:e2500:-:*:*:*:*:*:*:*

Information

Published : 2018-10-16 19:29

Updated : 2022-04-19 11:15

NVD link : CVE-2018-3955

Mitre link : CVE-2018-3955

JSON object : View

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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Products Affected

linksys

e1200
e2500
e1200_firmware
e2500_firmware

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