cvelistv5 - CVE-2023-40185

CVE-2023-40185 (GCVE-0-2023-40185)

Vulnerability from cvelistv5 – Published: 2023-08-23 20:20 – Updated: 2024-09-30 19:14

Summary

shescape is simple shell escape library for JavaScript. This may impact users that use Shescape on Windows in a threaded context. The vulnerability can result in Shescape escaping (or quoting) for the wrong shell, thus allowing attackers to bypass protections depending on the combination of expected and used shell. This bug has been patched in version 1.7.4.

Severity ?

6.5 (Medium)


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

CWE

CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences

Assigner

GitHub_M

References

URL

Tags

	https://github.com/ericcornelissen/shescape/secur…	x_refsource_CONFIRM
	https://github.com/ericcornelissen/shescape/pull/1142	x_refsource_MISC
	https://github.com/ericcornelissen/shescape/commi…	x_refsource_MISC
	https://github.com/ericcornelissen/shescape/relea…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	ericcornelissen	shescape	Affected: < 1.7.4

Show details on NVD website

JSON

To clipboard

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GSD-2023-40185

Vulnerability from gsd - Updated: 2023-12-13 01:20

Details

Aliases

CVE-2023-40185

Aliases

CVE-2023-40185

JSON

To clipboard

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      },
      "source": {
        "advisory": "GHSA-j55r-787p-m549",
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      }
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      "publishedDate": "2023-08-23T21:15Z"
    }
  }
}

FKIE_CVE-2023-40185

Vulnerability from fkie_nvd - Published: 2023-08-23 21:15 - Updated: 2024-11-21 08:18

Severity ?

6.5 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/ericcornelissen/shescape/commit/0b976dab645abf45ffd85e74a8c6e51ee2f42d63	Patch
security-advisories@github.com	https://github.com/ericcornelissen/shescape/pull/1142	Patch
security-advisories@github.com	https://github.com/ericcornelissen/shescape/releases/tag/v1.7.4	Release Notes
security-advisories@github.com	https://github.com/ericcornelissen/shescape/security/advisories/GHSA-j55r-787p-m549	Exploit, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ericcornelissen/shescape/commit/0b976dab645abf45ffd85e74a8c6e51ee2f42d63	Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ericcornelissen/shescape/pull/1142	Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ericcornelissen/shescape/releases/tag/v1.7.4	Release Notes
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ericcornelissen/shescape/security/advisories/GHSA-j55r-787p-m549	Exploit, Patch, Vendor Advisory

Impacted products

	Vendor	Product	Version
	shescape_project	shescape	*
	microsoft	windows	-

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
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              "criteria": "cpe:2.3:a:shescape_project:shescape:*:*:*:*:*:node.js:*:*",
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    }
  ],
  "id": "CVE-2023-40185",
  "lastModified": "2024-11-21T08:18:57.420",
  "metrics": {
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}

GHSA-J55R-787P-M549

Vulnerability from github – Published: 2023-08-22 18:00 – Updated: 2023-09-01 19:46

Summary

Shescape on Windows escaping may be bypassed in threaded context

Details

Impact

This may impact users that use Shescape on Windows in a threaded context (e.g. using Worker threads). The vulnerability can result in Shescape escaping (or quoting) for the wrong shell, thus allowing attackers to bypass protections depending on the combination of expected and used shell.

This snippet demonstrates a vulnerable use of Shescape:

// vulnerable.js

import { exec } from "node:child_process";
import { Worker, isMainThread } from 'node:worker_threads';

import * as shescape from "shescape";

if (isMainThread) {
  // 1. Something like a worker thread must be used. The reason being that they
  // unexpectedly change environment variable names on Windows.
  new Worker("./vulnerable.js");
} else {
  // 2. Example configuration that's problematic. In this setup example the
  // expected default system shell is CMD. We configure the use of PowerShell.
  // Shescape will fail to look up PowerShell and default to escaping for CMD
  // instead, resulting in the vulnerability.
  const options = {
    shell: "powershell",
    interpolation: true,
  };

  // 3. Using shescape to protect against attacks, this is correct.
  const escaped = shescape.escape("&& ls", options);

  // 4. Invoking a command with the escaped user input, this is vulnerable in
  // this case.
  exec(`echo Hello ${escaped}`, options, (error, stdout) => {
    if (error) {
      console.error(`An error occurred: ${error}`);
    } else {
      console.log(stdout);
    }
  });
}

Patches

This bug has been patched in v1.7.4 which you can upgrade to now. No further changes are required.

Workarounds

If you are impacted there is no workaround possible.

References

Shescape Pull Request #1142
Shescape commit 0b976da
Shescape release v1.7.4

For more information

Comment on Pull Request #1142
Comment on commit 0b976da
Open an issue at https://github.com/ericcornelissen/shescape/issues (New issue > Question > Get started)

Severity ?

8.6 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "shescape"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-40185"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-150"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-08-22T18:00:04Z",
    "nvd_published_at": "2023-08-23T21:15:09Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nThis may impact users that use Shescape on Windows in a threaded context (e.g. using [Worker threads](https://nodejs.org/api/worker_threads.html)). The vulnerability can result in Shescape escaping (or quoting) for the wrong shell, thus allowing attackers to bypass protections depending on the combination of expected and used shell.\n\nThis snippet demonstrates a vulnerable use of Shescape:\n\n```javascript\n// vulnerable.js\n\nimport { exec } from \"node:child_process\";\nimport { Worker, isMainThread } from \u0027node:worker_threads\u0027;\n\nimport * as shescape from \"shescape\";\n\nif (isMainThread) {\n  // 1. Something like a worker thread must be used. The reason being that they\n  // unexpectedly change environment variable names on Windows.\n  new Worker(\"./vulnerable.js\");\n} else {\n  // 2. Example configuration that\u0027s problematic. In this setup example the\n  // expected default system shell is CMD. We configure the use of PowerShell.\n  // Shescape will fail to look up PowerShell and default to escaping for CMD\n  // instead, resulting in the vulnerability.\n  const options = {\n    shell: \"powershell\",\n    interpolation: true,\n  };\n\n  // 3. Using shescape to protect against attacks, this is correct.\n  const escaped = shescape.escape(\"\u0026\u0026 ls\", options);\n\n  // 4. Invoking a command with the escaped user input, this is vulnerable in\n  // this case.\n  exec(`echo Hello ${escaped}`, options, (error, stdout) =\u003e {\n    if (error) {\n      console.error(`An error occurred: ${error}`);\n    } else {\n      console.log(stdout);\n    }\n  });\n}\n```\n\n### Patches\n\nThis bug has been patched in [v1.7.4](https://github.com/ericcornelissen/shescape/releases/tag/v1.7.4) which you can upgrade to now. No further changes are required.\n\n### Workarounds\n\nIf you are impacted there is no workaround possible.\n\n### References\n\n- Shescape Pull Request [#1142](https://github.com/ericcornelissen/shescape/pull/1142)\n- Shescape commit [`0b976da`](https://github.com/ericcornelissen/shescape/commit/0b976dab645abf45ffd85e74a8c6e51ee2f42d63)\n- Shescape release [v1.7.4](https://github.com/ericcornelissen/shescape/releases/tag/v1.7.4)\n\n### For more information\n\n- Comment on Pull Request [#1142](https://github.com/ericcornelissen/shescape/pull/1142)\n- Comment on commit [`0b976da`](https://github.com/ericcornelissen/shescape/commit/0b976dab645abf45ffd85e74a8c6e51ee2f42d63)\n- Open an issue at [https://github.com/ericcornelissen/shescape/issues](https://github.com/ericcornelissen/shescape/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc) (New issue \u003e Question \u003e Get started)",
  "id": "GHSA-j55r-787p-m549",
  "modified": "2023-09-01T19:46:34Z",
  "published": "2023-08-22T18:00:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ericcornelissen/shescape/security/advisories/GHSA-j55r-787p-m549"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-40185"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ericcornelissen/shescape/pull/1142"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ericcornelissen/shescape/commit/0b976dab645abf45ffd85e74a8c6e51ee2f42d63"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ericcornelissen/shescape"
    },
    {
      "type": "WEB",
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  "schema_version": "1.4.0",
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      "type": "CVSS_V3"
    }
  ],
  "summary": "Shescape on Windows escaping may be bypassed in threaded context"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2023-40185 (GCVE-0-2023-40185)

GSD-2023-40185

FKIE_CVE-2023-40185

GHSA-J55R-787P-M549

Impact

Patches

Workarounds

References

For more information

Tags

Sightings

Nomenclature