Current Description
An issue was discovered in LibreNMS through 1.47. Several of the scripts perform dynamic script inclusion via the include() function on user supplied input without sanitizing the values by calling basename() or a similar function. An attacker can leverage this to execute PHP code from the included file. Exploitation of these scripts is made difficult by additional text being appended (typically .inc.php), which means an attacker would need to be able to control both a filename and its content on the server. However, exploitation can be achieved as demonstrated by the csv.php?report=../ substring.
Source:
MITRE
View Analysis Description
Analysis Description
An issue was discovered in LibreNMS through 1.47. Several of the scripts perform dynamic script inclusion via the include() function on user supplied input without sanitizing the values by calling basename() or a similar function. An attacker can leverage this to execute PHP code from the included file. Exploitation of these scripts is made difficult by additional text being appended (typically .inc.php), which means an attacker would need to be able to control both a filename and its content on the server. However, exploitation can be achieved as demonstrated by the csv.php?report=../ substring.
Source:
MITRE
Impact
CVSS v3.1 Severity and Metrics:
Base Score:
8.1 HIGH
Vector:
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
(V3.1 legend)
Impact Score:
5.9
Exploitability Score:
2.2
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High
CVSS v2.0 Severity and Metrics:
Base Score:
6.8 MEDIUM
Vector:
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
(V2 legend)
Impact Subscore:
6.4
Exploitability Subscore:
8.6
Access Vector (AV):
Network
Access Complexity (AC):
Medium
Authentication (AU):
None
Confidentiality (C):
Partial
Integrity (I):
Partial
Availability (A):
Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service
References to Advisories, Solutions, and Tools
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Technical Details
Vulnerability Type
(View All)
- Improper Control of Generation of Code ('Code Injection') (CWE-94)
Change History
1 change record found
- show changes
Initial Analysis -
9/10/2019 12:05:16 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:* versions up to (including) 1.47 |
| Added |
CVSS V2 |
|
NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) |
| Added |
CVSS V3.1 |
|
NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Added |
CWE |
|
CWE-94 |
| Changed |
Reference Type |
https://www.darkmatter.ae/xen1thlabs/librenms-limited-local-file-inclusion-via-directory-traversal-vulnerability-xl-19-020/ No Types Assigned |
https://www.darkmatter.ae/xen1thlabs/librenms-limited-local-file-inclusion-via-directory-traversal-vulnerability-xl-19-020/ Exploit, Third Party Advisory |