Bug 1283137 (CVE-2015-7503) - CVE-2015-7503 php-ZendFramework2: Usage of vulnerable PKCS#1 v1.5 padding allows to recover RSA private key
Summary: CVE-2015-7503 php-ZendFramework2: Usage of vulnerable PKCS#1 v1.5 padding all...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2015-7503
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1289317 1289318 1289319
Blocks: 1289320
TreeView+ depends on / blocked
 
Reported: 2015-11-18 11:10 UTC by Adam Mariš
Modified: 2020-05-20 21:15 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-05-20 21:15:37 UTC
Embargoed:

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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.
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