VULNERABILITY INTELLIGENCE

CVE-2021-4238

CVSS score9.1 CRITICAL

EPSS probability1.41%

CISA KEVNot currently listed

Published2022-12-27

Last modified2026-06-17

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

Description

Randomly-generated alphanumeric strings contain significantly less entropy than expected. The RandomAlphaNumeric and CryptoRandomAlphaNumeric functions always return strings containing at least one digit from 0 to 9. This significantly reduces the amount of entropy in short strings generated by these functions.

Weakness classification

nvd@nist.gov: CWE-331

Primary references

security@golang.org — Patch, Third Party Advisory
security@golang.org — Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Patch, Third Party Advisory