CVE-2017-11671

Description

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. This could potentially lead to less randomness in random number generation.

Category

4.0
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.11%
Vendor Advisory redhat.com Vendor Advisory gnu.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://openwall.com/lists/oss-security/2017/07/27/2 third party advisory mailing list
http://www.securityfocus.com/bid/100018 third party advisory vdb entry
https://access.redhat.com/errata/RHSA-2018:0849 vendor advisory
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180 vendor advisory issue tracking
https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01349.html mailing list

Frequently Asked Questions

What is the severity of CVE-2017-11671?
CVE-2017-11671 has been scored as a medium severity vulnerability.
How to fix CVE-2017-11671?
To fix CVE-2017-11671, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-11671 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-11671 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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