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.

References

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

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

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

http://www.securityfocus.com/bid/100018

http://openwall.com/lists/oss-security/2017/07/27/2

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3