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.

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)