Bug 1573802 (CVE-2018-10546)

Summary:	CVE-2018-10546 php: Infinite loop in ext/iconv/iconv.c when using stream filter with convert.incov on invalid sequence leads to denial-of-service
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	apmukher, fedora, hhorak, jorton, kbost, kwalker, pim, ravpatil, rcollet, webstack-team, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 5.6.36, php 7.0.30, php 7.1.17, php 7.2.5	Doc Type:	If docs needed, set a value
Doc Text:	An infinite loop vulnerability was found in ext/iconv/iconv.c in PHP due to the iconv stream not rejecting invalid multibyte sequences. A remote attacker could use this vulnerability to hang the php process and consume resources.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-19 08:47:13 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:	1563859, 1573816, 1578432, 1578433, 1578434, 1578435
Bug Blocks:	1573818, 1574650

Description Adam Mariš 2018-05-02 09:52:06 UTC

An issue was discovered in PHP before 5.6.36, 7.0.x before 7.0.30, 7.1.x before 7.1.17, and 7.2.x before 7.2.5. An infinite loop exists in ext/iconv/iconv.c because the iconv stream filter does not reject invalid multibyte sequences.

Upstream bug:

https://bugs.php.net/bug.php?id=76249

Upstream patch:

https://git.php.net/?p=php-src.git;a=commit;h=06d309fd7a917575d65c7a6f4f57b0e6bb0f9711

Comment 1 Adam Mariš 2018-05-02 10:04:59 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1573816]

Comment 7 Riccardo Schirone 2018-05-15 15:16:46 UTC

The versions of PHP as provided by Red Hat Enterprise Linux 5, 6 and 7, though they do contain the vulnerable code, cannot be used to trigger the vulnerability with the linked test case. In the provided versions, php://memory stream changed the way it reads data, but we do not exclude other ways to trigger the vulnerability still exist.

Comment 9 Pim Rupert 2018-05-23 15:10:25 UTC

Is there any update on releasing updated packages for PHP on RHEL 7? (I have no access to the four linked issues.)

Comment 10 errata-xmlrpc 2019-08-19 08:41:06 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS

Via RHSA-2019:2519 https://access.redhat.com/errata/RHSA-2019:2519

Comment 11 Product Security DevOps Team 2019-08-19 08:47:13 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-2018-10546