Bug 2275061 (CVE-2024-3096) - CVE-2024-3096 php: password_verify can erroneously return true, opening ATO risk
Summary: CVE-2024-3096 php: password_verify can erroneously return true, opening ATO risk
Keywords:
Status: NEW
Alias: CVE-2024-3096
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2275062
Blocks: 2275070
TreeView+ depends on / blocked
 
Reported: 2024-04-15 07:54 UTC by ybuenos
Modified: 2025-05-13 10:35 UTC (History)
0 users

Fixed In Version: php 8.1.28, php 8.2.18, php 8.3.6
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2024:11026 0 None None None 2024-12-12 22:36:49 UTC
Red Hat Product Errata RHSA-2024:10949 0 None None None 2024-12-11 11:45:03 UTC
Red Hat Product Errata RHSA-2024:10950 0 None None None 2024-12-11 11:44:44 UTC
Red Hat Product Errata RHSA-2024:10951 0 None None None 2024-12-11 11:45:25 UTC
Red Hat Product Errata RHSA-2024:10952 0 None None None 2024-12-11 11:44:21 UTC
Red Hat Product Errata RHSA-2025:7315 0 None None None 2025-05-13 10:35:37 UTC

Description ybuenos 2024-04-15 07:54:51 UTC 
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.

If a user were able to create a password with a leading null byte (unlikely, but syntactically valid), an attacker could trivially compromise the victim's account by attempting to sign in with a blank string.
Comment 1 ybuenos 2024-04-15 07:55:06 UTC 
Created php tracking bugs for this issue:

Affects: fedora-all [bug 2275062]
Comment 3 errata-xmlrpc 2024-12-11 11:44:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:10952 https://access.redhat.com/errata/RHSA-2024:10952
Comment 4 errata-xmlrpc 2024-12-11 11:44:43 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:10950 https://access.redhat.com/errata/RHSA-2024:10950
Comment 5 errata-xmlrpc 2024-12-11 11:45:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:10949 https://access.redhat.com/errata/RHSA-2024:10949
Comment 6 errata-xmlrpc 2024-12-11 11:45:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:10951 https://access.redhat.com/errata/RHSA-2024:10951
Comment 8 errata-xmlrpc 2025-05-13 10:35:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:7315 https://access.redhat.com/errata/RHSA-2025:7315
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