CVE-2024-3096

PHP function password_verify can erroneously return true when argument contains NUL

Description

In PHP  version 8.1.* before 8.1.28, 8.2.* before 8.2.18, 8.3.* before 8.3.5, if a password stored with password_hash() starts with a null byte (\x00), testing a blank string as the password via password_verify() will incorrectly return true.

Remediation

Workaround:

  • Pre-filter potential password strings to ensure they do not contain NUL bytes.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.06%
Affected: PHP Group PHP
Published at:
Updated at:

References

Link Tags
https://github.com/php/php-src/security/advisories/GHSA-h746-cjrr-wfmr
http://www.openwall.com/lists/oss-security/2024/04/12/11
https://lists.debian.org/debian-lts-announce/2024/05/msg00005.html
https://security.netapp.com/advisory/ntap-20240510-0010/

Frequently Asked Questions

What is the severity of CVE-2024-3096?
CVE-2024-3096 has been scored as a medium severity vulnerability.
How to fix CVE-2024-3096?
As a workaround for remediating CVE-2024-3096: Pre-filter potential password strings to ensure they do not contain NUL bytes.
Is CVE-2024-3096 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-3096 is being actively exploited. 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-2024-3096?
CVE-2024-3096 affects PHP Group PHP.
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