Vulnerability Monitor

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CVE-2017-11671

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 4.0, requiring local system access to exploit with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, for affected systems. Impacting 1 product from gnu organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-07-26T21:29:00.207

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 4.0 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:N/A:N

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

3.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-338

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	gnu	gcc	4.6	Yes
Application	gnu	gcc	4.7	Yes
Application	gnu	gcc	4.8	Yes
Application	gnu	gcc	4.9	Yes
Application	gnu	gcc	5.0	Yes
Application	gnu	gcc	5.1	Yes
Application	gnu	gcc	5.2	Yes
Application	gnu	gcc	5.3	Yes
Application	gnu	gcc	5.4	Yes
Application	gnu	gcc	6.0	Yes
Application	gnu	gcc	6.1	Yes
Application	gnu	gcc	6.2	Yes
Application	gnu	gcc	6.3	Yes

References

http://openwall.com/lists/oss-security/2017/07/27/2 Mailing List, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/100018 Third Party Advisory, VDB Entry ([email protected])
https://access.redhat.com/errata/RHSA-2018:0849 ([email protected])
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180 Issue Tracking, Vendor Advisory ([email protected])
https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01349.html Mailing List ([email protected])
http://openwall.com/lists/oss-security/2017/07/27/2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/100018 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2018:0849 (af854a3a-2127-422b-91ae-364da2661108)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180 Issue Tracking, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01349.html Mailing List (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For gnu's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.