Bug 1378127 (CVE-2016-6305)

Summary: CVE-2016-6305 openssl: SSL_peek() hang on empty record
Product: [Other] Security Response Reporter: Tomas Hoger <thoger>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jaeshin, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: openssl 1.1.0a Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-09-21 14:29:25 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: 1367347    
Attachments:
Description Flags
OpenSSL upstream fix none

Description Tomas Hoger 2016-09-21 14:26:36 UTC 
Quoting form the draft of the OpenSSL upstream advisory:

SSL_peek() hang on empty record (CVE-2016-6305)
===============================================

Severity: Moderate

OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an
empty record. This could be exploited by a malicious peer in a Denial Of Service
attack.

OpenSSL 1.1.0 users should upgrade to 1.1.0a

This issue was reported to OpenSSL on 10th September 2016 by Alex Gaynor. The
fix was developed by Matt Caswell of the OpenSSL development team.
Comment 1 Tomas Hoger 2016-09-21 14:26:44 UTC 
Acknowledgments:

Name: the OpenSSL project
Upstream: Alex Gaynor
Comment 2 Tomas Hoger 2016-09-21 14:28:11 UTC 
Created attachment 1203332 [details]
OpenSSL upstream fix
Comment 3 Tomas Hoger 2016-09-21 14:28:48 UTC 
Upstream bug with reproducer:

https://github.com/openssl/openssl/issues/1563
Comment 4 Tomas Hoger 2016-09-21 14:29:25 UTC 
This issue only affected OpenSSL 1.1.0, which is not yet part of any Red Hat product.
Comment 5 Adam Mariš 2016-09-22 15:12:29 UTC 
External References:

https://www.openssl.org/news/secadv/20160922.txt
Comment 6 Tomas Hoger 2016-09-26 10:33:39 UTC 
Upstream commit:

https://git.openssl.org/?p=openssl.git;a=commitdiff;h=63658103d4441924f8dbfc517b99bb54758a98b9