CVE-2020-35700: Librenms/librenms SQL Injection Vulnerability

HIGH
Advisory Identifier: GHSA-h59f-p56g-g75v
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CVSS 8.8
CWE-89
Published
Advisory Summary

CVE-2020-35700 is a HIGH (CVSS 8.8) sql injection vulnerability (CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')) affecting Librenms/librenms libraries in the Packagist ecosystem. The issue involves sql injection in librenms. Remediation is available by upgrading affected packages to version 21.1.0.

CVE-2020-35700 at a Glance

CVE Identifier CVE-2020-35700
GHSA Identifier GHSA-h59f-p56g-g75v
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Affected Product Librenms/librenms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-35700

To remediate this vulnerability, upgrade all affected Librenms/librenms dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

librenms/librenms fixed: 21.1.0 
Upgrade librenms/librenms to 21.1.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for librenms/librenms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-35700, inspect your project dependencies for Librenms/librenms:

inspect dependencies for librenms/librenms

Analyze the terminal output to locate any version of Librenms/librenms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 21.1.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), where the product constructs all or part of an sql command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended sql command when it is sent to a downstream component. without sufficient removal or quoting of sql syntax in user-controllable inputs, the generated sql query can cause those inputs to be interpreted as sql instead of ordinary user data. In Librenms/librenms, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A second-order SQL injection issue in Widgets/TopDevicesController.php (aka the Top Devices dashboard widget) of LibreNMS before 21.1.0 allows remote authenticated attackers to execute arbitrary SQL commands via the sort_order parameter against the /ajax/form/widget-settings endpoint.

CVE-2020-35700 Affected Librenms/librenms Versions

1 component(s)
Fixed Versions:
21.1.0
Product / Package Ecosystem Affected Versions Fixed Version
librenms/librenms
 Packagist
< 21.1.0
21.1.0

References

NVD — CVE-2020-35700 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35700
Librenms/librenms Source Repository REPOSITORY
https://github.com/librenms/librenms/issues/12405
Librenms/librenms Source Repository REPOSITORY
https://github.com/librenms/librenms/pull/12422
Librenms/librenms Source Repository REPOSITORY
https://github.com/librenms/librenms/blob/master/app/Http/Controllers/Widgets/TopDevicesController.php
Librenms/librenms Release RELEASE
https://github.com/librenms/librenms/releases/tag/21.1.0
www.horizon3.ai/disclosures/librenm... WEB
https://www.horizon3.ai/disclosures/librenms-second-order-sqli

Frequently Asked Questions

What is CVE-2020-35700?
CVE-2020-35700 is a security vulnerability in Librenms/librenms involving SQL Injection in librenms under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection').
Which Librenms/librenms versions are affected?
Affected versions include releases prior to 21.1.0 across affected packages: librenms/librenms.
What version fixes CVE-2020-35700?
Upgrading to 21.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is librenms/librenms affected?
Yes, librenms/librenms is affected in releases prior to 21.1.0. Upgrade your dependency to 21.1.0 or later.
What is the CVSS score of CVE-2020-35700?
CVE-2020-35700 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-35700?
CVE-2020-35700 is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.).
How can I check Packagist dependencies for CVE-2020-35700?
Run the dependency tree command: 'inspect dependencies for librenms/librenms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h59f-p56g-g75v",
  "modified" : "2021-04-05T20:39:08Z",
  "published" : "2021-05-06T18:53:02Z",
  "aliases" : [ "CVE-2020-35700" ],
  "summary" : "SQL Injection in librenms",
  "details" : "A second-order SQL injection issue in Widgets/TopDevicesController.php (aka the Top Devices dashboard widget) of LibreNMS before 21.1.0 allows remote authenticated attackers to execute arbitrary SQL commands via the sort_order parameter against the /ajax/form/widget-settings endpoint.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "librenms/librenms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "21.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-35700"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/issues/12405"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/pull/12422"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/blob/master/app/Http/Controllers/Widgets/TopDevicesController.php"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/releases/tag/21.1.0"
  }, {
    "type" : "WEB",
    "url" : "https://www.horizon3.ai/disclosures/librenms-second-order-sqli"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-89" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-05T20:39:08Z",
    "nvd_published_at" : "2021-02-08T09:15:00Z"
  }
}