Bug 1588313 (CVE-2016-1000338)

Summary: CVE-2016-1000338 bouncycastle: DSA does not fully validate ASN.1 encoding during signature verification allowing for injection of unsigned data
Product: [Other] Security Response Reporter: Sam Fowler <sfowler>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: avibelli, bcourt, bgeorges, bkearney, bmaxwell, bmcclain, cbillett, cdewolf, chazlett, csutherl, darran.lofthouse, dblechte, dimitris, dosoudil, drieden, eedri, hhorak, jawilson, jbalunas, jjohnstn, jmatthew, jolee, jorton, jpallich, jschatte, jshepherd, jstastny, krathod, lgao, lthon, mgoldboi, michal.skrivanek, mmccune, mrike, mszynkie, myarboro, ohadlevy, pdrozd, pgallagh, pgier, psakar, pslavice, psotirop, puntogil, rchan, rgrunber, rnetuka, rruss, rsvoboda, sbonazzo, sherold, steve.traylen, sthorger, tomckay, trogers, tsanders, twalsh, vhalbert, vtunka, ykaul
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: bouncycastle 1.56 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-10 10:27:28 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1588315, 1588316, 1588317, 1588320, 1589566, 1589567, 1592662, 1700954    
Bug Blocks: 1588310    

Description Sam Fowler 2018-06-07 05:20:02 UTC
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 05:22:59 UTC
Created bouncycastle tracking bugs for this issue:

Affects: epel-all [bug 1588315]
Affects: fedora-all [bug 1588316]

Comment 3 Sam Fowler 2018-06-07 05:29:34 UTC
Created bouncycastle tracking bugs for this issue:

Affects: epel-6 [bug 1588320]

Comment 6 Kurt Seifried 2018-06-10 20:28:41 UTC
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 07:55:57 UTC
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 15:22:50 UTC
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