CVE-2023-0567

Public Exploit
password_verify() always returns true for some invalid hashes

Description

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. 

Category

7.7
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory php.net Vendor Advisory github.com
Affected: PHP Group PHP
Published at:
Updated at:

References

Link Tags
https://bugs.php.net/bug.php?id=81744 vendor advisory
https://github.com/php/php-src/security/advisories/GHSA-7fj2-8x79-rjf4 vendor advisory exploit
https://security.netapp.com/advisory/ntap-20230331-0008/

Frequently Asked Questions

What is the severity of CVE-2023-0567?
CVE-2023-0567 has been scored as a high severity vulnerability.
How to fix CVE-2023-0567?
To fix CVE-2023-0567, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-0567 being actively exploited in the wild?
It is possible that CVE-2023-0567 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-0567?
CVE-2023-0567 affects PHP Group PHP.
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