Bug 1475733 – CVE-2017-11671 gcc: GCC generates incorrect code for RDRAND/RDSEED intrinsics

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Bug 1475733 - (CVE-2017-11671) CVE-2017-11671 gcc: GCC generates incorrect code for RDRAND/RDSEED intrinsics

Summary:	CVE-2017-11671 gcc: GCC generates incorrect code for RDRAND/RDSEED intrinsics

Status:	NEW

Aliases:	CVE-2017-11671

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=low,public=20170325,reported=2...
Keywords:	Security

Depends On:	1475736 1475735 1475737 1482761 1482762
Blocks:	1475740
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Reported:	2017-07-27 04:53 EDT by Adam Mariš
Modified:	2018-04-10 04:26 EDT (History)
CC List:	14 users (show)

See Also:
Fixed In Version:	gcc 5.5, gcc 6.4
Doc Type:	If docs needed, set a value
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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-2018:0849	None	None	None	2018-04-10 04:26 EDT

Groups: None (edit)

Description Adam Mariš 2017-07-27 04:53:39 EDT

Under certain circumstances, the ix86_expand_builtin function in i386.c in GNU Compiler Collection (GCC) version 4.6, 4.7, 4.8, 4.9, 5 before 5.5, and 6 before 6.4 will generate instruction sequences that clobber the status flag of the RDRAND and RDSEED intrinsics before it can be read, potentially causing failures of these instructions to go unreported.

Upstream bug:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180

Upstream patch:

https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01349.html

References:

http://seclists.org/oss-sec/2017/q3/218

Comment 1 Adam Mariš 2017-07-27 04:54:20 EDT

Created gcc tracking bugs for this issue:

Affects: fedora-25 [bug 1475735]


Created mingw-gcc tracking bugs for this issue:

Affects: epel-all [bug 1475736]
Affects: fedora-25 [bug 1475737]

Comment 13 errata-xmlrpc 2018-04-10 04:25:52 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0849 https://access.redhat.com/errata/RHSA-2018:0849

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