Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Gcc | 4.6 |
Related Weaknesses (CWE)
References
- http://openwall.com/lists/oss-security/2017/07/27/2Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/100018Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0849
- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180Issue TrackingVendor Advisory
- https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01349.htmlMailing List
- http://openwall.com/lists/oss-security/2017/07/27/2Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/100018Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0849
- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180Issue TrackingVendor Advisory
- https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01349.htmlMailing List
FAQ
What is CVE-2017-11671?
CVE-2017-11671 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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 ...
How severe is CVE-2017-11671?
CVE-2017-11671 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-11671?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Gcc.