Bug 1337461

Summary: Disable/remove export ciphersuites in OpenSSL
Product: Red Hat Enterprise Linux 6 Reporter: Nikos Mavrogiannopoulos <nmavrogi>
Component: opensslAssignee: Tomas Mraz <tmraz>
Status: CLOSED ERRATA QA Contact: Stanislav Zidek <szidek>
Severity: unspecified Docs Contact: Mirek Jahoda <mjahoda>
Priority: unspecified    
Version: 6.9CC: hkario, qe-baseos-security, szidek, tmraz
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: openssl-1.0.1e-51.el6 Doc Type: Deprecated Functionality
Doc Text:
The EXPORT cipher suites in *OpenSSL* are deprecated This change removes support for the EXPORT cipher suites in the *OpenSSL* toolkit. Disabling the weak cipher suites prevents attacks such as the FREAK attack. The EXPORT cipher suites are not required in any *TLS* protocol configuration.
 Story Points: ---
Clone Of: 1337460 Environment:
Last Closed: 2017-03-21 10:11:44 UTC Type: Bug
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:    
Bug Blocks: 1335911, 1343211    

Description Nikos Mavrogiannopoulos 2016-05-19 09:20:57 UTC 
RHEL includes several cryptographic components who's security doesn't remain constant over time. Algorithms such as (cryptographic) hashing and encryption typically have a lifetime after which they are considered either too risky to use or plain insecure. That would mean we need to phase out such algorithms from the default settings, or completely disable if they could cause irreparable issue. 

This bug is about disabling by default and removing the ability to negotiate the marked as EXPORT ciphersuites. It should not be possible by applications to inadvertently enable them.
Comment 2 Tomas Mraz 2016-10-05 09:18:55 UTC 
I've also disabled all ciphersuites that upstream disables in current openssl upstream when enable-weak-ssl-ciphers is not used. These are basically ciphers with key lengths < 128 bits which are insecure similarly to the export ciphers.
Comment 9 errata-xmlrpc 2017-03-21 10:11:44 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2017-0660.html