Bug 1283137 (CVE-2015-7503)

Summary:	CVE-2015-7503 php-ZendFramework2: Usage of vulnerable PKCS#1 v1.5 padding allows to recover RSA private key
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	ccoleman, dmcphers, jialiu, joelsmith, jokerman, lmeyer, mmccomas, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-20 21:15:37 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:	1289317, 1289318, 1289319
Bug Blocks:	1289320

Description Adam Mariš 2015-11-18 11:10:53 UTC

It was found that `Zend\Crypt\PublicKey\Rsa\PublicKey` has a call to `openssl_public_encrypt()`, which uses PHP's default `$padding` argument, which specifies `OPENSSL_PKCS1_PADDING`, indicating usage of PKCS1v1.5 padding. This padding has a known vulnerability, the Bleichenbacher's chosen-ciphertext attack, that can be used to recover an RSA private key.

Comment 1 Kurt Seifried 2015-12-07 20:50:31 UTC

This is now public:

http://framework.zend.com/security/advisory/ZF2015-10

Comment 3 Kurt Seifried 2015-12-07 20:51:51 UTC

Created php-ZendFramework2 tracking bugs for this issue:

Affects: fedora-all [bug 1289317]
Affects: epel-all [bug 1289318]

Comment 4 Product Security DevOps Team 2020-05-20 21:15:37 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.