CVE-2018-3953
Scores
EPSS
Percentile: 68.5%
CVSS
CVSS Score: 7.2/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
High (H)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
High (H)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
High (H)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Authentication
Single
Describes the level of privileges an attacker must possess
Confidentiality Impact
Complete
Measures the impact to the confidentiality of information
Integrity Impact
Complete
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Complete
Measures the impact to the availability of the impacted component
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.
Scaner-VS 7 — a modern vulnerability management solution
Sources
CWEs
Related Vulnerabilities
Vulnerable Software (2)
Type: Configuration
Vendor: *
Product: e1200_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:linksys:e1200_firmware:2.0.09:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": ...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:linksys:e1200_firmware:2.0.09:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:linksys:e1200:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: e2500_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:linksys:e2500_firmware:3.0.04:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": ...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:linksys:e2500_firmware:3.0.04:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:linksys:e2500:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd