CVE-2024-34346: Deno Deno Permission Escalation Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-23rx-c3g5-hv9w
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CVSS 8.4
CWE-863
Published
Advisory Summary

CVE-2024-34346 is a HIGH (CVSS 8.4) deno permission escalation vulnerability vulnerability (CWE-863: Incorrect Authorization) affecting Deno libraries in the crates.io ecosystem. The issue involves deno permission escalation vulnerability via open of privileged files with missing `--deny` flag. Remediation is available by upgrading affected packages to version 1.43.1.

CVE-2024-34346 at a Glance

CVE Identifier CVE-2024-34346
GHSA Identifier GHSA-23rx-c3g5-hv9w
Severity HIGH
CVSS v3.1 Base Score 8.4
CWE Classification CWE-863: Incorrect Authorization
Affected Product Deno
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 8.4

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

Attack Vector Adjacent (AV:A)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2024-34346

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: 1.43.1 
Upgrade deno to 1.43.1
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-2024-34346, 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 1.43.1), 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-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. 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

The Deno sandbox may be unexpectedly weakened by allowing file read/write access to privileged files in various locations on Unix and Windows platforms. For example, reading `/proc/self/environ` may provide access equivalent to `--allow-env`, and writing `/proc/self/mem` may provide access equivalent to `--allow-all`. Users who grant read and write access to the entire filesystem may not realize that these access to these files may have additional, unintended consequences. The documentation did not reflect that this practice should be undertaken to increase the strength of the security sandbox. ### Impact Users who run code with `--allow-read` or `--allow-write` may unexpectedly end up granting additional permissions via file-system operations. ### Patches Deno 1.43 and above require explicit `--allow-all` access to read or write `/etc`, `/dev` on unix platform (as well as `/proc` and `/sys` on linux platforms), and any path starting with `\\` on Windows. ### Workarounds The security sandbox in previous versions of Deno allows for denial of access to these files, but it requires an explicit addition of deny flags: `--deny-read=/dev --deny-read=/sys --deny-read=/proc --deny-read=/etc --deny-write=/dev --deny-write=/sys --deny-write=/proc --deny-write=/etc`. Note that symlinks in allowed locations may defeat this protection in earlier versions of Deno. ### Reporters This vulnerability was reported by a number of analysts. Thanks to [oliver@secfault-security.com](mailto:oliver@secfault-security.com), [finn@secfault-security.com](mailto:finn@secfault-security.com), @leesh3288, and @cristianstaicu for their reports and analysis.

CVE-2024-34346 Affected Deno Versions

1 component(s)
Fixed Versions:
1.43.1
Product / Package Ecosystem Affected Versions Fixed Version
deno
 crates.io
< 1.43.1
1.43.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/denoland/deno/security/advisories/GHSA-23rx-c3g5-hv9w
NVD — CVE-2024-34346 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-34346
Deno Source Repository REPOSITORY
https://github.com/denoland/deno

Frequently Asked Questions

What is CVE-2024-34346?
CVE-2024-34346 is a security vulnerability in Deno involving Deno permission escalation vulnerability via open of privileged files with missing `--deny` flag under CWE-863: Incorrect Authorization.
Which Deno versions are affected?
Affected versions include releases prior to 1.43.1 across affected packages: deno.
What version fixes CVE-2024-34346?
Upgrading to 1.43.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is deno affected?
Yes, deno is affected in releases prior to 1.43.1. Upgrade your dependency to 1.43.1 or later.
What is the CVSS score of CVE-2024-34346?
CVE-2024-34346 has a CVSS v3.1 base score of 8.4 (HIGH) with vector string CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2024-34346?
CVE-2024-34346 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check crates.io dependencies for CVE-2024-34346?
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-23rx-c3g5-hv9w",
  "modified" : "2024-05-08T14:33:16Z",
  "published" : "2024-05-08T14:33:16Z",
  "aliases" : [ "CVE-2024-34346" ],
  "summary" : "Deno permission escalation vulnerability via open of privileged files with missing `--deny` flag",
  "details" : "The Deno sandbox may be unexpectedly weakened by allowing file read/write access to privileged files in various locations on Unix and Windows platforms. For example, reading `/proc/self/environ` may provide access equivalent to `--allow-env`, and writing `/proc/self/mem` may provide access equivalent to `--allow-all`.\n\nUsers who grant read and write access to the entire filesystem may not realize that these access to these files may have additional, unintended consequences. The documentation did not reflect that this practice should be undertaken to increase the strength of the security sandbox. \n\n### Impact\n\nUsers who run code with `--allow-read` or `--allow-write` may unexpectedly end up granting additional permissions via file-system operations.\n\n### Patches\n\nDeno 1.43 and above require explicit `--allow-all` access to read or write `/etc`, `/dev` on unix platform (as well as `/proc` and `/sys` on linux platforms), and any path starting with `\\\\` on Windows.\n\n### Workarounds\n\nThe security sandbox in previous versions of Deno allows for denial of access to these files, but it requires an explicit addition of deny flags: `--deny-read=/dev --deny-read=/sys --deny-read=/proc --deny-read=/etc --deny-write=/dev --deny-write=/sys --deny-write=/proc --deny-write=/etc`. Note that symlinks in allowed locations may defeat this protection in earlier versions of Deno.\n\n### Reporters\n\nThis vulnerability was reported by a number of analysts. Thanks to [oliver@secfault-security.com](mailto:oliver@secfault-security.com), [finn@secfault-security.com](mailto:finn@secfault-security.com), @leesh3288, and @cristianstaicu for their reports and analysis.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "deno"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.43.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/denoland/deno/security/advisories/GHSA-23rx-c3g5-hv9w"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-34346"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/denoland/deno"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-05-08T14:33:16Z",
    "nvd_published_at" : "2024-05-07T21:15:09Z"
  }
}