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   
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.


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

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