SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(Oracle Issues Fix for Oracle Linux) OpenSSL DSA Signing Constant Timing Bug May Let Remote Users Obtain Potentially Sensitive Information on the Target System
SecurityTracker Alert ID:  1037018
SecurityTracker URL:  http://securitytracker.com/id/1037018
CVE Reference:   CVE-2016-2178   (Links to External Site)
Date:  Oct 17 2016
Impact:   Disclosure of authentication information, Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in OpenSSL. A remote user can obtain potentially sensitive information on the target system.

The DSA signing algorithm may fail to run in constant time when the BN_FLG_CONSTTIME flag is set. A remote user may be able to exploit this to obtain potentially sensitive timing information regarding the cryptographic signature process, including the DSA private key.

The original advisory is available at:

http://eprint.iacr.org/2016/594.pdf

Cesar Pereida (Aalto University), Billy Brumley (Tampere University of Technology), and Yuval Yarom (The University of Adelaide and NICTA) reported this vulnerability.

Impact:   A remote user can obtain potentially sensitive timing information regarding the cryptographic signature process, including the DSA private key.
Solution:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2016-3627.html

Vendor URL:  linux.oracle.com/errata/ELSA-2016-3627.html (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  5

Message History:   This archive entry is a follow-up to the message listed below.
Jun 8 2016 OpenSSL DSA Signing Constant Timing Bug May Let Remote Users Obtain Potentially Sensitive Information on the Target System



 Source Message Contents

Subject:  [El-errata] ELSA-2016-3627 Important: Oracle Linux 5 openssl security update

Oracle Linux Security Advisory ELSA-2016-3627

http://linux.oracle.com/errata/ELSA-2016-3627.html

The following updated rpms for Oracle Linux 5 have been uploaded to the 
Unbreakable Linux Network:

i386:
openssl-0.9.8e-40.0.3.el5_11.i386.rpm
openssl-0.9.8e-40.0.3.el5_11.i686.rpm
openssl-devel-0.9.8e-40.0.3.el5_11.i386.rpm
openssl-perl-0.9.8e-40.0.3.el5_11.i386.rpm

x86_64:
openssl-0.9.8e-40.0.3.el5_11.i686.rpm
openssl-0.9.8e-40.0.3.el5_11.x86_64.rpm
openssl-devel-0.9.8e-40.0.3.el5_11.i386.rpm
openssl-devel-0.9.8e-40.0.3.el5_11.x86_64.rpm
openssl-perl-0.9.8e-40.0.3.el5_11.x86_64.rpm

ia64:
openssl-0.9.8e-40.0.3.el5_11.i686.rpm
openssl-0.9.8e-40.0.3.el5_11.ia64.rpm
openssl-devel-0.9.8e-40.0.3.el5_11.ia64.rpm
openssl-perl-0.9.8e-40.0.3.el5_11.ia64.rpm


SRPMS:
http://oss.oracle.com/ol5/SRPMS-updates/openssl-0.9.8e-40.0.3.el5_11.src.rpm



Description of changes:

[0.9.8e-40.0.3]
- fix CVE-2016-2177 - possible integer overflow
- fix CVE-2016-2178 - non-constant time DSA operations
- fix CVE-2016-2182 - possible buffer overflow in BN_bn2dec()
- fix CVE-2016-6306 - certificate message OOB reads
- mitigate CVE-2016-2183 - degrade all 64bit block ciphers and RC4 to
   112 bit effective strength

_______________________________________________
El-errata mailing list
El-errata@oss.oracle.com
https://oss.oracle.com/mailman/listinfo/el-errata
 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2019, SecurityGlobal.net LLC