Bug 1323108 (CVE-2016-4071)

Summary:	CVE-2016-4071 php: Format string vulnerability in php_snmp_error()
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, dmcphers, fedora, hpham, jialiu, jokerman, jorton, kseifried, lmeyer, mmaslano, mmccomas, rcollet, tiwillia, webstack-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 5.5.34, php 5.6.20, php 7.0.5	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-06-23 11:03:51 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:	1323112
Bug Blocks:	1323121

Description Adam Mariš 2016-04-01 10:09:35 UTC

A format string vulnerability was found in php_snmp_error() in ext/snmp/snmp.c, possibly leading to code execution. snmp_object->snmp_errstr is passed directly to zend_throw_exception_ex() without a "%s".

Upstream bug:

https://bugs.php.net/bug.php?id=71704

Upstream patch:

https://git.php.net/?p=php-src.git;a=commit;h=6e25966544fb1d2f3d7596e060ce9c9269bbdcf8

Comment 1 Adam Mariš 2016-04-01 10:10:52 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1323112]

Comment 2 Fedora Update System 2016-04-09 14:21:01 UTC

php-5.6.20-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-04-09 14:22:30 UTC

php-5.6.20-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 Stefan Cornelius 2016-05-04 16:03:11 UTC

SNMP is usually only used within LANs, which limits the attack vector. Additionally, this is only an issue if exception processing is enabled for the SNMP object-

Mitigation:

Do not enable exceptions when using the SNMP object.

Comment 8 errata-xmlrpc 2016-11-15 11:50:45 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2016:2750 https://rhn.redhat.com/errata/RHSA-2016-2750.html