Bug 1202406 (CVE-2015-1787)

Summary: CVE-2015-1787 openssl: segmentation fault in client authentication with empty CKE and DHE
Product: [Other] Security Response Reporter: Martin Prpič <mprpic>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: security-response-team, tmraz
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: openssl 1.0.2a Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-03-18 03:38:36 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 1202442    

Description Martin Prpič 2015-03-16 14:43:41 UTC
If client authentication is used, then a server can crash with a segmentation fault in the event of a DHE ciphersuite being selected and a zero length ClientKeyExchange (CKE) message being sent by the client. This could be exploited in a denial of service attack.

This issue affects OpenSSL version 1.0.2, and is fixed in version 1.0.2a.

Acknowledgements:

Red Hat would like to thank the OpenSSL project for reporting this issue. Upstream acknowledges Matt Caswell of the OpenSSL development team as the original reporter.

Comment 1 Huzaifa S. Sidhpurwala 2015-03-18 03:37:22 UTC
Statement:

This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 5, 6, and 7.