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Bug 1588708 - (CVE-2016-1000341) CVE-2016-1000341 bouncycastle: Information exposure in DSA signature generation via timing attack
CVE-2016-1000341 bouncycastle: Information exposure in DSA signature generati...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20180607,repor...
: Security
Depends On: 1589581 1592662 1588709 1588710 1588711 1589580
Blocks: 1588310
  Show dependency tree / graph
 
Reported: 2018-06-07 14:22 EDT by Pedro Sampaio
Modified: 2018-10-25 11:42 EDT (History)
64 users (show)

See Also:
Fixed In Version: bouncycastle 1.56
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2669 None None None 2018-09-11 03:57 EDT
Red Hat Product Errata RHSA-2018:2927 None None None 2018-10-16 11:25 EDT

  None (edit)
Description Pedro Sampaio 2018-06-07 14:22:11 EDT 
In the Bouncy Castle JCE Provider version 1.55 and earlier DSA signature
generation is vulnerable to timing attack. Where timings can be closely observed
for the generation of signatures, the lack of blinding in 1.55, or earlier, may
allow an attacker to gain information about the signature's k value and
ultimately the private value as well.

Upstream patch:

https://github.com/bcgit/bc-java/commit/acaac81f96fec91ab45bd0412beaf9c3acd8defa#diff-e75226a9ca49217a7276b29242ec59ce
Comment 1 Pedro Sampaio 2018-06-07 14:23:02 EDT 
Created bouncycastle tracking bugs for this issue:

Affects: epel-all [bug 1588711]
Affects: fedora-all [bug 1588709]
Comment 3 Mat Booth 2018-06-07 16:07:06 EDT 
(In reply to Pedro Sampaio from comment #1)
> Affects: fedora-all [bug 1588709]

Fedora already carries bouncycastle newer than 1.56, so I will close this bug.
Comment 6 Kurt Seifried 2018-06-10 16:29:28 EDT 
Statement:

This issue affects the versions of bouncycastle as shipped with Red Hat Subscription Asset Manager 1.x. Red Hat Product Security has rated this issue as having a security impact of Moderate. No update is planned for this product at this time. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Comment 8 errata-xmlrpc 2018-09-11 03:57:14 EDT 
This issue has been addressed in the following products:

  Red Hat JBoss Fuse

Via RHSA-2018:2669 https://access.redhat.com/errata/RHSA-2018:2669
Comment 9 errata-xmlrpc 2018-10-16 11:25:12 EDT 
This issue has been addressed in the following products:

  Red Hat Satellite 6.4 for RHEL 7

Via RHSA-2018:2927 https://access.redhat.com/errata/RHSA-2018:2927
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