GitHub Advisoryadvisory · npm
GHSA-h5vj-f7r9-w564 Entropy Backdoor in text-qrcode
HIGH
Official page ↗
- Ecosystem
- npm
- Packages
- text-qrcode
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-506
- Reviewed
- 2020-08-31
Affected packages
• npm text-qrcode: >= 0.0.0 (no fix yet)
Description
All versions of `text-qrcode` contain malicious code that overwrites the `randomBytes` method for the `crypto` module with a function that generates weak entropy. Instead of generating 32 bytes, the infected randomBytes will generate 3 bytes of entropy and hash them, resulting in a 32 byte value being returned, but one that is easily guessable.
Recommendation
Uninstall `text-qrcode` immediately. If the module was used to generate entropy that is load bearing, all such instances of generated entropy must be replaced. This includes things like bitcoin wallets, private keys, encrypted messages, etc.
Related
Weakness · CWE (1)
- CWE-506 Embedded Malicious Code weakness