Bug 1304379 (CVE-2015-8804)

Summary: CVE-2015-8804 nettle: miscalculations on secp384 curve
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: carnil, dwmw2, klember, mike, nmavrogi, pwouters, slawomir, tmraz
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: nettle 3.2 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-11-03 21:59:48 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: 1304304, 1304305, 1304306, 1304308, 1305766, 1314374    
Bug Blocks: 1304384    
Attachments:
Description Flags
Test case none

Description Andrej Nemec 2016-02-03 12:54:22 UTC 
A mistake in the computation of elliptic curve scalar multiplications was found in nettle.

External reference:

https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003024.html

Upstream fix:

https://git.lysator.liu.se/nettle/nettle/commit/fa269b6ad06dd13c901dbd84a12e52b918a09cd7
Comment 1 Andrej Nemec 2016-02-03 12:56:41 UTC 
CVE assignment:

http://seclists.org/oss-sec/2016/q1/273

As stated in the above-mentioned article, this issue only affects 64 bit x86 systems.
Comment 5 Tomas Hoger 2016-02-09 07:53:33 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 6 Tomas Hoger 2016-02-09 07:55:56 UTC 
Created attachment 1122347 [details]
Test case

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

https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003024.html
Comment 17 errata-xmlrpc 2016-11-03 19:31:05 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