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Bug 1588313 - (CVE-2016-1000338) CVE-2016-1000338 bouncycastle: DSA does not fully validate ASN.1 encoding during signature verification allowing for injection of unsigned data
CVE-2016-1000338 bouncycastle: DSA does not fully validate ASN.1 encoding dur...
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=20161015,repor...
: Security
Depends On: 1588320 1589567 1592662 1588315 1588316 1588317 1589566
Blocks: 1588310
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Reported: 2018-06-07 01:20 EDT by Sam Fowler
Modified: 2018-10-25 11:41 EDT (History)
64 users (show)

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Fixed In Version: bouncycastle 1.56
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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 03:56 EDT
Red Hat Product Errata RHSA-2018:2927 None None None 2018-10-16 11:23 EDT

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Description Sam Fowler 2018-06-07 01:20:02 EDT 
In Bouncy Castle JCE Provider version 1.55 and earlier the DSA does not fully validate ASN.1 encoding of signature on verification. It is possible to inject extra elements in the sequence making up the signature and still have it validate, which in some cases may allow the introduction of 'invisible' data into a signed structure.


Upstream Commits:

https://github.com/bcgit/bc-java/commit/b0c3ce99d43d73a096268831d0d120ffc89eac7f#diff-3679f5a9d2b939d0d3ee1601a7774fb0
Comment 1 Sam Fowler 2018-06-07 01:22:59 EDT 
Created bouncycastle tracking bugs for this issue:

Affects: epel-all [bug 1588315]
Affects: fedora-all [bug 1588316]
Comment 3 Sam Fowler 2018-06-07 01:29:34 EDT 
Created bouncycastle tracking bugs for this issue:

Affects: epel-6 [bug 1588320]
Comment 6 Kurt Seifried 2018-06-10 16:28:41 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 03:55:57 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 11:22:50 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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