CVE-2024-27931: Deno Insufficient Permission Checking Vulnerability

Q: What is CVE-2024-27931?

CVE-2024-27931 is a security vulnerability in Deno involving Insufficient permission checking in `Deno.makeTemp*` APIs under CWE-20: Improper Input Validation.

Q: Which Deno versions are affected?

Affected versions include releases prior to 1.41.1 across affected packages: deno.

Q: What version fixes CVE-2024-27931?

Upgrading to 1.41.1 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is deno affected?

Yes, deno is affected in releases prior to 1.41.1. Upgrade your dependency to 1.41.1 or later.

Q: What is the CVSS score of CVE-2024-27931?

CVE-2024-27931 has a CVSS v3.1 base score of 5.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

Q: What CWE is associated with CVE-2024-27931?

CVE-2024-27931 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).

Q: How can I check crates.io dependencies for CVE-2024-27931?

Run the dependency tree command: 'inspect dependencies for deno'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

MODERATE

Advisory Identifier: GHSA-hrqr-jv8w-v9jh

CVSS 5.8

CWE-20

Published 2024-03-05

Advisory Summary

CVE-2024-27931 is a MODERATE (CVSS 5.8) insufficient permission checking vulnerability (CWE-20: Improper Input Validation) affecting Deno libraries in the crates.io ecosystem. The issue involves insufficient permission checking in `deno.maketemp*` apis. Remediation is available by upgrading affected packages to version 1.41.1.

CVE-2024-27931 at a Glance

CVE Identifier CVE-2024-27931

GHSA Identifier GHSA-hrqr-jv8w-v9jh

Severity MODERATE

CVSS v3.1 Base Score 5.8

CWE Classification CWE-20: Improper Input Validation

Affected Product Deno

Package Ecosystem crates.io

Published Date 2024-03-05

Last Updated 2024-03-05

Security Impact

CVSS: 5.8

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:C/C:N/I:L/A:N).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction None (UI:N)

Scope Changed (S:C)

Confidentiality None (C:N)

Integrity Low (I:L)

Availability None (A:N)

How to Fix CVE-2024-27931

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

deno fixed: 1.41.1

Upgrade deno to 1.41.1

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 deno

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-27931, inspect your project dependencies for Deno:

inspect dependencies for deno

Analyze the terminal output to locate any version of Deno in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.41.1), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Deno, 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

### Impact Insufficient validation of parameters in `Deno.makeTemp*` APIs would allow for creation of files outside of the allowed directories. This may allow the user to overwrite important files on the system that may affect other systems. A user may provide a prefix or suffix to a `Deno.makeTemp*` API containing path traversal characters. The permission check would prompt for the base directory of the API, but the final file that was created would be outside of this directory: ``` $ mkdir /tmp/good $ mkdir /tmp/bad $ deno repl --allow-write=/tmp/good > Deno.makeTempFileSync({ dir: "/tmp/bad" }) ┌ ⚠️ Deno requests write access to "/tmp/bad". ├ Requested by `Deno.makeTempFile()` API. ├ Run again with --allow-write to bypass this prompt. └ Allow? [y/n/A] (y = yes, allow; n = no, deny; A = allow all write permissions) > n ❌ Denied write access to "/tmp/bad". Uncaught PermissionDenied: Requires write access to "/tmp/bad", run again with the --allow-write flag at Object.makeTempFileSync (ext:deno_fs/30_fs.js:176:10) at <anonymous>:1:27 > Deno.makeTempFileSync({ dir: "/tmp/good", prefix: "../bad/" }) "/tmp/good/../bad/a9432ef5" $ ls -l /tmp/bad/a9432ef5 -rw-------@ 1 user group 0 Mar 4 09:20 /tmp/bad/a9432ef5 ``` ### Patches This is fixed in Deno 1.41.1.

CVE-2024-27931 Affected Deno Versions

1 component(s)

Fixed Versions:

1.41.1

Product / Package	Ecosystem	Affected Versions	Fixed Version
deno	crates.io	< 1.41.1	1.41.1

References

GitHub Advisory / Wiki ADVISORY

https://github.com/denoland/deno/security/advisories/GHSA-hrqr-jv8w-v9jh

NVD — CVE-2024-27931 NVD

https://nvd.nist.gov/vuln/detail/CVE-2024-27931

Deno Source Repository REPOSITORY

https://github.com/denoland/deno

Frequently Asked Questions

What is CVE-2024-27931?

CVE-2024-27931 is a security vulnerability in Deno involving Insufficient permission checking in `Deno.makeTemp*` APIs under CWE-20: Improper Input Validation.

Which Deno versions are affected?

Affected versions include releases prior to 1.41.1 across affected packages: deno.

What version fixes CVE-2024-27931?

Upgrading to 1.41.1 (or the latest patched release for your respective branch) resolves the vulnerability.

Is deno affected?

Yes, deno is affected in releases prior to 1.41.1. Upgrade your dependency to 1.41.1 or later.

What is the CVSS score of CVE-2024-27931?

CVE-2024-27931 has a CVSS v3.1 base score of 5.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

What CWE is associated with CVE-2024-27931?

CVE-2024-27931 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).

How can I check crates.io dependencies for CVE-2024-27931?

Run the dependency tree command: 'inspect dependencies for deno'. 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-hrqr-jv8w-v9jh",
  "modified" : "2024-03-05T20:30:03Z",
  "published" : "2024-03-05T16:19:44Z",
  "aliases" : [ "CVE-2024-27931" ],
  "summary" : "Insufficient permission checking in `Deno.makeTemp*` APIs",
  "details" : "### Impact\n\nInsufficient validation of parameters in `Deno.makeTemp*` APIs would allow for creation of files outside of the allowed directories. This may allow the user to overwrite important files on the system that may affect other systems.\n\nA user may provide a prefix or suffix to a `Deno.makeTemp*` API containing path traversal characters. The permission check would prompt for the base directory of the API, but the final file that was created would be outside of this directory:\n\n```\n$ mkdir /tmp/good\n$ mkdir /tmp/bad\n$ deno repl --allow-write=/tmp/good\n> Deno.makeTempFileSync({ dir: \"/tmp/bad\" })\n┌ ⚠️  Deno requests write access to \"/tmp/bad\".\n├ Requested by `Deno.makeTempFile()` API.\n├ Run again with --allow-write to bypass this prompt.\n└ Allow? [y/n/A] (y = yes, allow; n = no, deny; A = allow all write permissions) > n\n❌ Denied write access to \"/tmp/bad\".\nUncaught PermissionDenied: Requires write access to \"/tmp/bad\", run again with the --allow-write flag\n    at Object.makeTempFileSync (ext:deno_fs/30_fs.js:176:10)\n    at <anonymous>:1:27\n> Deno.makeTempFileSync({ dir: \"/tmp/good\", prefix: \"../bad/\" })\n\"/tmp/good/../bad/a9432ef5\"\n$ ls -l /tmp/bad/a9432ef5\n-rw-------@ 1 user  group  0 Mar  4 09:20 /tmp/bad/a9432ef5\n```\n\n### Patches\n\nThis is fixed in Deno 1.41.1.\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "deno"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.41.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/denoland/deno/security/advisories/GHSA-hrqr-jv8w-v9jh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-27931"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/denoland/deno"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-03-05T16:19:44Z",
    "nvd_published_at" : "2024-03-05T17:15:07Z"
  }
}

CVSS V3

5.8 MODERATE