Bug 2026045 (CVE-2021-21707)

Summary:	CVE-2021-21707 php: Special character breaks path in xml parsing
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	fedora, hhorak, jorton, rcollet
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php-8.1.0 php-7.3.33	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in php. The main cause of this vulnerability is improper input validation while parsing an Extensible Markup Language(XML) entity. A special character could allow an attacker to traverse directories. The highest threat from this vulnerability is confidentiality.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-07-04 15:24:30 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:	2026046, 2026647, 2026648, 2026649, 2026650, 2100757
Bug Blocks:	2026047

Description Guilherme de Almeida Suckevicz 2021-11-23 17:09:46 UTC

A flaw was found in PHP. A special character is breaking the path in XML function.

Reference:
https://bugs.php.net/bug.php?id=79971

Upstream patch:
https://github.com/php/php-src/commit/f15f8fc573eb38c3c73e23e0930063a6f6409ed4

Comment 1 Guilherme de Almeida Suckevicz 2021-11-23 17:11:08 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 2026046]

Comment 4 errata-xmlrpc 2022-07-04 07:43:15 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7

Via RHSA-2022:5491 https://access.redhat.com/errata/RHSA-2022:5491

Comment 5 Product Security DevOps Team 2022-07-04 15:24:28 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-2021-21707

Comment 6 errata-xmlrpc 2022-11-08 09:52:13 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