CVE-2020-15877: Librenms/librenms Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-3c33-3465-fhx2
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CVSS 8.8
CWE-668
Published
Advisory Summary

CVE-2020-15877 is a HIGH (CVSS 8.8) remote code execution vulnerability (CWE-668: Exposure of Resource to Wrong Sphere) affecting Librenms/librenms libraries in the Packagist ecosystem. The issue involves exposure of resource to wrong sphere in librenms. Remediation is available by upgrading affected packages to version 1.65.1.

CVE-2020-15877 at a Glance

CVE Identifier CVE-2020-15877
GHSA Identifier GHSA-3c33-3465-fhx2
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-668: Exposure of Resource to Wrong Sphere
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-2020-15877

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: 1.65.1 
Upgrade librenms/librenms to 1.65.1
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-2020-15877, 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 1.65.1), 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-668: Exposure of Resource to Wrong Sphere, where the product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. 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

An issue was discovered in LibreNMS before 1.65.1. It has insufficient access control for normal users because of "'guard' => 'admin'" instead of "'middleware' => ['can:admin']" in routes/web.php.

CVE-2020-15877 Affected Librenms/librenms Versions

1 component(s)
Fixed Versions:
1.65.1
Product / Package Ecosystem Affected Versions Fixed Version
librenms/librenms
 Packagist
< 1.65.1
1.65.1

References

NVD — CVE-2020-15877 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15877
Librenms/librenms Source Repository REPOSITORY
https://github.com/librenms/librenms/pull/11915
Security Fix Commit FIX COMMIT
https://github.com/librenms/librenms/commit/e5bb6d80bc308fc56b9a01ffb76c34159995353c
community.librenms.org/c/announcements WEB
https://community.librenms.org/c/announcements
Librenms/librenms Source Repository REPOSITORY
https://github.com/librenms/librenms/compare/1.65...1.65.1
Librenms/librenms Release RELEASE
https://github.com/librenms/librenms/releases/tag/1.65.1
shielder.it/blog WEB
https://shielder.it/blog

Frequently Asked Questions

What is CVE-2020-15877?
CVE-2020-15877 is a security vulnerability in Librenms/librenms involving Exposure of Resource to Wrong Sphere in LibreNMS under CWE-668: Exposure of Resource to Wrong Sphere.
Which Librenms/librenms versions are affected?
Affected versions include releases prior to 1.65.1 across affected packages: librenms/librenms.
What version fixes CVE-2020-15877?
Upgrading to 1.65.1 (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 1.65.1. Upgrade your dependency to 1.65.1 or later.
What is the CVSS score of CVE-2020-15877?
CVE-2020-15877 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-2020-15877?
CVE-2020-15877 is classified under CWE-668: Exposure of Resource to Wrong Sphere (The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.).
How can I check Packagist dependencies for CVE-2020-15877?
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-3c33-3465-fhx2",
  "modified" : "2021-07-26T19:20:01Z",
  "published" : "2021-09-08T17:27:16Z",
  "aliases" : [ "CVE-2020-15877" ],
  "summary" : "Exposure of Resource to Wrong Sphere in LibreNMS",
  "details" : "An issue was discovered in LibreNMS before 1.65.1. It has insufficient access control for normal users because of \"'guard' => 'admin'\" instead of \"'middleware' => ['can:admin']\" in routes/web.php.",
  "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" : "1.65.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15877"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/pull/11915"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/commit/e5bb6d80bc308fc56b9a01ffb76c34159995353c"
  }, {
    "type" : "WEB",
    "url" : "https://community.librenms.org/c/announcements"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/compare/1.65...1.65.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/releases/tag/1.65.1"
  }, {
    "type" : "WEB",
    "url" : "https://shielder.it/blog"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-668" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-07-26T19:20:01Z",
    "nvd_published_at" : "2020-07-21T17:15:00Z"
  }
}