CVE-2021-44278: Librenms/librenms Path Traversal Vulnerability

CRITICAL
Advisory Identifier: GHSA-7289-chwj-7h86
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CVSS 9.8
CWE-22
Published
Advisory Summary

CVE-2021-44278 is a CRITICAL (CVSS 9.8) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Librenms/librenms libraries in the Packagist ecosystem. The issue involves path traversal in librenms/librenms. Remediation is available in the latest vendor maintenance releases.

CVE-2021-44278 at a Glance

CVE Identifier CVE-2021-44278
GHSA Identifier GHSA-7289-chwj-7h86
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Librenms/librenms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2021-44278

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: Latest secure release 
Upgrade librenms/librenms to Latest secure release
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-2021-44278, 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 the patched release), 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. 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

Librenms 21.11.0 is affected by a path manipulation vulnerability in includes/html/pages/device/showconfig.inc.php.

CVE-2021-44278 Affected Librenms/librenms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
librenms/librenms
 Packagist
≤ 21.11.0

References

NVD — CVE-2021-44278 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-44278
Librenms/librenms Source Repository REPOSITORY
https://github.com/librenms/librenms/pull/13554
Librenms/librenms Source Repository REPOSITORY
https://github.com/librenms/librenms

Frequently Asked Questions

What is CVE-2021-44278?
CVE-2021-44278 is a security vulnerability in Librenms/librenms involving Path traversal in librenms/librenms under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Librenms/librenms versions are affected?
Affected versions include releases prior to current release patches across affected packages: librenms/librenms.
What version fixes CVE-2021-44278?
Upgrading to current release patches (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 Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2021-44278?
CVE-2021-44278 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-44278?
CVE-2021-44278 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Packagist dependencies for CVE-2021-44278?
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-7289-chwj-7h86",
  "modified" : "2021-12-06T22:05:08Z",
  "published" : "2021-12-10T20:18:30Z",
  "aliases" : [ "CVE-2021-44278" ],
  "summary" : "Path traversal in librenms/librenms",
  "details" : "Librenms 21.11.0 is affected by a path manipulation vulnerability in includes/html/pages/device/showconfig.inc.php.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "librenms/librenms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "21.11.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-44278"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/librenms/librenms/pull/13554"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/librenms/librenms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-12-06T22:05:08Z",
    "nvd_published_at" : "2021-12-03T13:15:00Z"
  }
}