Bug 1885738 (CVE-2020-7070)

Summary:	CVE-2020-7070 php: URL decoding of cookie names can lead to different interpretation of cookies between browser and server
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:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	fedora, hhorak, jlyle, jorton, nbhumkar, rcollet, rmetrich, surpatil
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 7.4.11, php 7.3.23, php 7.2.34	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-08-03 13:07:02 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:	1885741, 1890719, 1890720, 1890721, 1890722, 1890723, 1977767
Bug Blocks:	1885753

Description Guilherme de Almeida Suckevicz 2020-10-06 20:20:12 UTC

In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like __Host confused with cookies that decode to such prefix, thus leading to an attacker being able to forge cookie which is supposed to be secure. See also CVE-2020-8184 for more information.

Reference:
https://bugs.php.net/bug.php?id=79699

Comment 1 Guilherme de Almeida Suckevicz 2020-10-06 20:20:41 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1885741]

Comment 2 Remi Collet 2020-10-07 05:18:42 UTC

Notice: this fix introduce a behavior change, as cookie names are no more decoded, which may break application relying on this (wrong) behavior

Comment 4 Marco Benatto 2020-10-22 19:31:28 UTC

Upstream commit for this issue:
https://git.php.net/?p=php-src.git;a=commit;h=6559fe912661ca5ce5f0eeeb591d928451428ed0

Comment 6 errata-xmlrpc 2021-08-03 09:15:51 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 7.7 EUS

Via RHSA-2021:2992 https://access.redhat.com/errata/RHSA-2021:2992

Comment 7 Product Security DevOps Team 2021-08-03 13:07:02 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-2020-7070

Comment 8 errata-xmlrpc 2021-11-09 17:45:16 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4213 https://access.redhat.com/errata/RHSA-2021:4213