CVE-2021-32685: Tenvoy Improper Verification Of Cryptographic Signature Vulnerability

CRITICAL
Advisory Identifier: GHSA-7r96-8g3x-g36m
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CVSS 9.8
CWE-347
Published
Advisory Summary

CVE-2021-32685 is a CRITICAL (CVSS 9.8) improper verification of cryptographic signature vulnerability (CWE-347: Improper Verification of Cryptographic Signature) affecting Tenvoy libraries in the npm ecosystem. The issue involves improper verification of cryptographic signature. Remediation is available by upgrading affected packages to version 7.0.3.

CVE-2021-32685 at a Glance

CVE Identifier CVE-2021-32685
GHSA Identifier GHSA-7r96-8g3x-g36m
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-347: Improper Verification of Cryptographic Signature
Affected Product Tenvoy
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:U/C:H/I:H/A:H).

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

How to Fix CVE-2021-32685

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

tenvoy fixed: 7.0.3 
npm install tenvoy@7.0.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls tenvoy

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2021-32685, inspect your project dependencies using npm:

npm ls tenvoy

Analyze the terminal output to locate any version of Tenvoy in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.0.3), your application is affected.

Note: The npm ls tenvoy command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-347: Improper Verification of Cryptographic Signature, where the product does not verify, or incorrectly verifies, the cryptographic signature for data. In Tenvoy, 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 The `verifyWithMessage` method of `tEnvoyNaClSigningKey` always returns `true` for any signature of a SHA-512 hash matching the SHA-512 hash of the message even if the signature is invalid. ### Patches Upgrade to `v7.0.3` immediately to resolve this issue. Since the vulnerability lies within the verification method, the previous signatures are still valid. We highly recommend reverifying any signatures that were previously verified with the vulnerable `verifyWithMessage` method. ### Workarounds In `tenvoy.js` under the `verifyWithMessage` method definition within the `tEnvoyNaClSigningKey` class, ensure that the return statement call to `this.verify` ends in `.verified`. For example, the return statement should start with `return this.verify(signed, password).verified && ` instead of `return this.verify(signed, password) && `. ### For more information If you have any questions or comments about this advisory: * Open an issue in [github.com/TogaTech/tEnvoy](https://github.com/TogaTech/tEnvoy)

CVE-2021-32685 Affected Tenvoy Versions

1 component(s)
Fixed Versions:
7.0.3
Product / Package Ecosystem Affected Versions Fixed Version
tenvoy
npm/tenvoy
npm
< 7.0.3
7.0.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/TogaTech/tEnvoy/security/advisories/GHSA-7r96-8g3x-g36m
NVD — CVE-2021-32685 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32685
Security Fix Commit FIX COMMIT
https://github.com/TogaTech/tEnvoy/commit/a121b34a45e289d775c62e58841522891dee686b
Tenvoy Source Repository REPOSITORY
https://github.com/TogaTech/tEnvoy
Tenvoy Release RELEASE
https://github.com/TogaTech/tEnvoy/releases/tag/v7.0.3

Frequently Asked Questions

What is CVE-2021-32685?
CVE-2021-32685 is a security vulnerability in Tenvoy involving Improper Verification of Cryptographic Signature under CWE-347: Improper Verification of Cryptographic Signature.
Which Tenvoy versions are affected?
Affected versions include releases prior to 7.0.3 across affected packages: tenvoy.
What version fixes CVE-2021-32685?
Upgrading to 7.0.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is tenvoy affected?
Yes, tenvoy is affected in releases prior to 7.0.3. Upgrade your dependency to 7.0.3 or later.
What is the CVSS score of CVE-2021-32685?
CVE-2021-32685 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-32685?
CVE-2021-32685 is classified under CWE-347: Improper Verification of Cryptographic Signature (The product does not verify, or incorrectly verifies, the cryptographic signature for data.).
How can I check npm dependencies for CVE-2021-32685?
Run the dependency tree command: 'npm ls tenvoy'. 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-7r96-8g3x-g36m",
  "modified" : "2026-01-23T22:42:09Z",
  "published" : "2021-06-28T17:16:56Z",
  "aliases" : [ "CVE-2021-32685" ],
  "summary" : "Improper Verification of Cryptographic Signature",
  "details" : "### Impact\nThe `verifyWithMessage` method of `tEnvoyNaClSigningKey` always returns `true` for any signature of a SHA-512 hash matching the SHA-512 hash of the message even if the signature is invalid.\n\n### Patches\nUpgrade to `v7.0.3` immediately to resolve this issue. Since the vulnerability lies within the verification method, the previous signatures are still valid. We highly recommend reverifying any signatures that were previously verified with the vulnerable `verifyWithMessage` method.\n\n### Workarounds\nIn `tenvoy.js` under the `verifyWithMessage` method definition within the `tEnvoyNaClSigningKey` class, ensure that the return statement call to `this.verify` ends in `.verified`. For example, the return statement should start with `return this.verify(signed, password).verified && ` instead of `return this.verify(signed, password) && `.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [github.com/TogaTech/tEnvoy](https://github.com/TogaTech/tEnvoy)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "tenvoy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "7.0.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TogaTech/tEnvoy/security/advisories/GHSA-7r96-8g3x-g36m"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-32685"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TogaTech/tEnvoy/commit/a121b34a45e289d775c62e58841522891dee686b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TogaTech/tEnvoy"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TogaTech/tEnvoy/releases/tag/v7.0.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-347" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-06-16T20:14:25Z",
    "nvd_published_at" : null
  }
}