Bug 1310599 - (CVE-2016-0702) CVE-2016-0702 OpenSSL: Side channel attack on modular exponentiation
CVE-2016-0702 OpenSSL: Side channel attack on modular exponentiation
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160301,reported=2...
: Security
Depends On: 1331752 1301849 1301850 1301851 1301852 1313535 1313595 1313598
Blocks: 1301847 1395463
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Reported: 2016-02-22 05:34 EST by Huzaifa S. Sidhpurwala
Modified: 2017-01-19 01:55 EST (History)
27 users (show)

See Also:
Fixed In Version: openssl 1.0.1s, openssl 1.0.2g
Doc Type: Bug Fix
Doc Text:
A side-channel attack was found that makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. An attacker who has the ability to control code in a thread running on the same hyper-threaded core as the victim's thread that is performing decryption, could use this flaw to recover RSA private keys.
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Description Huzaifa S. Sidhpurwala 2016-02-22 05:34:34 EST
As per Upstream security advisory:

A side-channel attack was found which makes use of cache-bank conflicts on the
Intel Sandy-Bridge microarchitecture which could lead to the recovery of RSA
keys.  The ability to exploit this issue is limited as it relies on an attacker
who has control of code in a thread running on the same hyper-threaded core as
the victim thread which is performing decryptions.

This issue affects OpenSSL versions 1.0.2 and 1.0.1.

OpenSSL 1.0.2 users should upgrade to 1.0.2g
OpenSSL 1.0.1 users should upgrade to 1.0.1s

This issue was reported to OpenSSL on Jan 8th 2016 by Yuval Yarom, The
University of Adelaide and NICTA, Daniel Genkin, Technion and Tel Aviv
University, and Nadia Heninger, University of Pennsylvania with more
information at http://cachebleed.info.  The fix was developed by Andy Polyakov
of OpenSSL.
Comment 3 Martin Prpič 2016-02-29 07:29:04 EST
Acknowledgments:

Name: the OpenSSL project
Upstream: Yuval Yarom (University of Adelaide and NICTA), Daniel Genkin (Technion and Tel Aviv University), Nadia Heninger (University of Pennsylvania)
Comment 4 Martin Prpič 2016-03-01 04:01:28 EST
External References:

http://cachebleed.info/
https://www.openssl.org/news/secadv/20160301.txt
Comment 6 errata-xmlrpc 2016-03-01 11:09:25 EST
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2016:0301 https://rhn.redhat.com/errata/RHSA-2016-0301.html
Comment 10 Fedora Update System 2016-03-03 15:22:36 EST
openssl-1.0.2g-2.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 11 errata-xmlrpc 2016-03-09 09:49:29 EST
This issue has been addressed in the following products:

  RHEV-H and Agents for RHEL-6
  RHEV-H and Agents for RHEL-7

Via RHSA-2016:0379 https://rhn.redhat.com/errata/RHSA-2016-0379.html
Comment 12 Fedora Update System 2016-03-13 05:51:51 EDT
openssl-1.0.1k-14.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 13 Fedora Update System 2016-03-17 14:24:35 EDT
openssl101e-1.0.1e-7.el5 has been pushed to the Fedora EPEL 5 stable repository. If problems still persist, please make note of it in this bug report.
Comment 15 errata-xmlrpc 2016-12-15 17:15:53 EST
This issue has been addressed in the following products:



Via RHSA-2016:2957 https://rhn.redhat.com/errata/RHSA-2016-2957.html

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