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CVE-2018-3955

Published: Oct 17, 2018Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-78
NVD MITRE
7.2CVSSHIGH
EPSS Score
4.8%
Top 9.3%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-78

Affected Products

e1200 firmwarelinksysNetworking Infrastructure
e2500 firmwarelinksysNetworking Infrastructure
Linksys E1200Cisco Systems Inc.
On-prem
Networking Infrastructure / router-switch
Linksys E2500Cisco Systems Inc.
On-prem
Networking Infrastructure / router-switch
ESeries E1200LinksysNetworking Infrastructure
linksyscommercialUSNetworking Infrastructureaka linksys by cisco
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625
talosintelligence.com
https://www.checkpoint.com/defense/advisories/public/2019/cpai-2018-1073.html
checkpoint.com

Timeline

Published
Oct 17, 2018
Last Updated
Nov 21, 2024

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