Bug 86112

Summary: New timing attack on OpenSSL applications
Product: [Retired] Red Hat Linux Reporter: Mark J. Cox <mjc>
Component: opensslAssignee: Nalin Dahyabhai <nalin>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 8.0CC: mitr
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2003-04-15 11:32:24 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Mark J. Cox 2003-03-14 09:44:43 UTC
Description of problem:

Timing attack on RSA decryption because RSA blinding isn't
used in all applications (mod_ssl etc)

Version-Release number of selected component (if applicable):

This affects most applications that link to OpenSSL

How reproducible:

In order to exploit this issue you need to be local to the machine or be on a
network that enables you to reliably observe sub 1ms timing differences.  

Additional info:

http://crypto.stanford.edu/~dabo/papers/ssl-timing.pdf

Note that enabling RSA blinding is not trivial

Comment 1 Mark J. Cox 2003-03-14 09:45:56 UTC
(also note that this issue was entered for OpenSSL under Red Hat Linux 8.0 but
applies to all applications linked to OpenSSL under Red Hat Linux 6.2, 7, 7.1,
7.2, 8.0 and the Enterprise Linux family.


Comment 2 Mark J. Cox 2003-03-17 09:36:20 UTC
This is CAN-2003-0147.  The OpenSSL team are currently working on a patch that
enables RSA blinding by default, therefore only OpenSSL will need to be updated
and applications linked to it will not.

Comment 3 Mark J. Cox 2003-04-15 11:32:24 UTC
Was fixed by http://rhn.redhat.com/errata/RHSA-2003-101.html