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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWg1dmotZjdyOS13NTY0

Entropy Backdoor in text-qrcode

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.


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.

Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: about 3 years ago
Updated: 9 months ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-h5vj-f7r9-w564

Affected Packages

Versions: >= 0.0.0
No known fixed version