Bug 2055879 (CVE-2021-21708)

Summary:	CVE-2021-21708 php: Use after free due to php_filter_float() failing for ints
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	chorn, dwoodruf, fedora, hhorak, jburrell, jorton, rcollet
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 7.4.28	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in PHP. The vulnerability occurs due to the malformed php_filter_float() function and leads to a use-after-free vulnerability. This flaw allows an attacker to inject a malicious file, leading to a crash or a Segmentation fault.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-12-04 20:37:18 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2055880, 2056798, 2056799, 2056800, 2056801
Bug Blocks:	2055881

Description Pedro Sampaio 2022-02-17 20:43:02 UTC

Use after free due to php_filter_float() failing for ints.

References:

https://bugs.php.net/bug.php?id=81708
https://www.php.net/ChangeLog-7.php

Comment 1 Pedro Sampaio 2022-02-17 20:43:18 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 2055880]

Comment 2 Remi Collet 2022-02-18 06:59:18 UTC

This only affects PHP > 7.4 (where min∕max_range feature was added), older versions are not affectede

Comment 5 errata-xmlrpc 2022-11-08 09:51:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:7624 https://access.redhat.com/errata/RHSA-2022:7624

Comment 6 errata-xmlrpc 2022-11-08 09:52:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:7628 https://access.redhat.com/errata/RHSA-2022:7628

Comment 7 errata-xmlrpc 2022-11-15 10:35:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:8197 https://access.redhat.com/errata/RHSA-2022:8197

Comment 8 Product Security DevOps Team 2022-12-04 20:37:16 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-21708

Comment 10 errata-xmlrpc 2025-03-18 18:47:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2025:3016 https://access.redhat.com/errata/RHSA-2025:3016

Comment 11 errata-xmlrpc 2025-03-20 12:53:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.4 Telecommunications Update Service

Via RHSA-2025:3076 https://access.redhat.com/errata/RHSA-2025:3076