VULNERABILITY INTELLIGENCE

CVE-2021-43298

CVSS score9.8 CRITICAL
EPSS probability2.26%
CISA KEVNot currently listed
Published2022-01-25
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

The code that performs password matching when using 'Basic' HTTP authentication does not use a constant-time memcmp and has no rate-limiting. This means that an unauthenticated network attacker can brute-force the HTTP basic password, byte-by-byte, by recording the webserver's response time until the unauthorized (401) response.

Weakness classification

  • reefs@jfrog.com: CWE-208
  • nvd@nist.gov: CWE-307

Primary references