What is CVE-2023-0567?

CVE-2023-0567 is a high-severity vulnerability in Php, classified under Use of Password Hash With Insufficient Computational Effort. CVSS score: 7.7/10. Published 2023-03-01.

How severe is CVE-2023-0567?

High severity. CVSS v3 base score is 7.7 out of 10.

Is CVE-2023-0567 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Php

CVE-2023-0567

In PHP 8.0.X before 8.0.28, 8.1.X before 8.1.16 and 8.2.X before 8.2.3, password_verify() function may accept some invalid Blowfish hashes as valid. If such invalid hash ever ends up in the password database, it may lead to an application allowing any password for this entry as valid.

EPSS: 0.009 (57.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Php
Php Group — versions 8.1.x, 8.0.x, 8.1.*

Weakness classification (CWE)

CWE-916 — Use of Password Hash With Insufficient Computational Effort

Public proof-of-concept exploits

References

security@php.net (Vendor Advisory)
security@php.net (Exploit, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2023-0567?: CVE-2023-0567 is a high-severity vulnerability in Php, classified under Use of Password Hash With Insufficient Computational Effort. CVSS score: 7.7/10. Published 2023-03-01.
How severe is CVE-2023-0567?: High severity. CVSS v3 base score is 7.7 out of 10.
Is CVE-2023-0567 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.