Bug 1685412 (CVE-2019-9022)

Summary:	CVE-2019-9022 php: memcpy with negative length via crafted DNS response
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	apmukher, hhorak, jlyle, jorton, rcollet, webstack-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 7.1.26, php 7.2.14, php 7.3.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-19 08:47:48 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:	1709137, 1709138, 1709139, 1709140
Bug Blocks:	1680558

Description Dhananjay Arunesh 2019-03-05 07:04:30 UTC

An issue was discovered in PHP 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.2. dns_get_record misparses a DNS response, which can allow a hostile DNS server to cause PHP to misuse memcpy, leading to read operations going past the buffer allocated for DNS data. This affects php_parserr in ext/standard/dns.c for DNS_CAA and DNS_ANY queries.

Upstream commit:
http://git.php.net/?p=php-src.git;a=commit;h=8d3dfabef459fe7815e8ea2fd68753fd17859d7b

Reference:
https://bugs.php.net/bug.php?id=77369

Comment 1 Huzaifa S. Sidhpurwala 2019-05-13 05:28:03 UTC

Analysis:

A malicious, possibly MITM DNS server can send a crafted rely when called by PHP via dns_get_record(). The record needs to be of the type DNS_CAA or DNS_ANY. This can result in OOB read and crash.

Comment 3 errata-xmlrpc 2019-08-19 08:42:52 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 4 Product Security DevOps Team 2019-08-19 08:47:48 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-2019-9022

Comment 5 errata-xmlrpc 2019-11-01 13:00:48 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 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS

Via RHSA-2019:3299 https://access.redhat.com/errata/RHSA-2019:3299

Comment 6 errata-xmlrpc 2020-04-28 15:31:46 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1624 https://access.redhat.com/errata/RHSA-2020:1624