CVE-2018-3953
Linksys E-Series Router OS Command Injection 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 NVRAM. Data 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 continues until it reaches offset 0x0042B5C4 in the 'start_lltd' function. Within the 'start_lltd' function, a 'nvram_get' call is used to obtain the value of the user-controlled 'machine_name' NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed.
INFO
Published Date :
Oct. 17, 2018, 2:29 a.m.
Last Modified :
April 26, 2023, 6:52 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
1.2
Affected Products
The following products are affected by CVE-2018-3953
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-3953.
| URL | Resource |
|---|---|
| https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625 | Exploit Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-3953 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-3953 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Apr. 26, 2023
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H -
CVE Modified by [email protected]
Apr. 19, 2022
Action Type Old Value New Value Added CVSS V3 Talos AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H -
Initial Analysis by [email protected]
Jan. 23, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:S/C:C/I:C/A:C) Added CVSS V3 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625 No Types Assigned https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625 Exploit, Third Party Advisory Added CWE CWE-78 Added CPE Configuration AND OR *cpe:2.3:o:linksys:e1200_firmware:2.0.09:*:*:*:*:*:*:* OR cpe:2.3:h:linksys:e1200:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:linksys:e2500_firmware:3.0.04:*:*:*:*:*:*:* OR cpe:2.3:h:linksys:e2500:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-3953 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-3953
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.20 }} 0.00%
score
0.58779
percentile