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Bug 1304303 (CVE-2015-8803) - CVE-2015-8803 nettle: secp256 calculation bug
Summary: CVE-2015-8803 nettle: secp256 calculation bug
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2015-8803
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1304304 1304305 1304306 1304307 1304308 1305766 1314374
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-02-03 09:52 UTC by Andrej Nemec
Modified: 2021-02-17 04:23 UTC (History)
8 users (show)

Fixed In Version: nettle 3.2
Clone Of:
Environment:
Last Closed: 2016-11-03 21:59:32 UTC
Embargoed:

Attachments (Terms of Use)
Test case (deleted)
2016-02-09 07:55 UTC, Tomas Hoger 		no flags Details
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2582 0 normal SHIPPED_LIVE Moderate: nettle security and bug fix update 2016-11-03 12:08:24 UTC

Description Andrej Nemec 2016-02-03 09:52:35 UTC 
A mistake in the computation of elliptic curve scalar multiplications was found in nettle. The computation compiles a certain curve point with 1, which should not change the coordinates, however it does.

External reference:

https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.html

Upstream fix:

https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d
Comment 1 Andrej Nemec 2016-02-03 09:53:34 UTC 
Created nettle tracking bugs for this issue:

Affects: fedora-all [bug 1304305]
Affects: epel-5 [bug 1304307]
Comment 2 Andrej Nemec 2016-02-03 09:53:40 UTC 
Created mingw-nettle tracking bugs for this issue:

Affects: fedora-all [bug 1304304]
Affects: epel-7 [bug 1304308]
Comment 3 Andrej Nemec 2016-02-03 09:53:45 UTC 
Created compat-nettle27 tracking bugs for this issue:

Affects: fedora-23 [bug 1304306]
Comment 5 Andrej Nemec 2016-02-03 13:08:37 UTC 
CVE assignment:

http://seclists.org/oss-sec/2016/q1/273
Comment 6 Fedora Update System 2016-02-04 23:21:45 UTC 
nettle-3.2-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 8 Tomas Hoger 2016-02-09 07:53:30 UTC 
Reporter's blog post:

https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html

Fixed upstream in nettle 3.2:

https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html
Comment 9 Tomas Hoger 2016-02-09 07:55:53 UTC 
Created attachment 1122346 [details]
Test case

Local copy of the test case that was posted to the upstream list:

https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.html
Comment 11 Fedora Update System 2016-02-15 02:53:23 UTC 
mingw-gnutls-3.4.9-1.fc23, mingw-nettle-3.2-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 12 Fedora Update System 2016-02-21 02:23:02 UTC 
nettle-2.7.1-6.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 15 Fedora Update System 2016-06-02 14:56:48 UTC 
compat-nettle27-2.7.1-2.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 16 errata-xmlrpc 2016-11-03 19:30:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2582 https://rhn.redhat.com/errata/RHSA-2016-2582.html
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