CVE-2019-15847

Severity CVSS v4.0:
Pending analysis
Type:
CWE-331 Insufficient Entropy
Publication date:
02/09/2019
Last modified:
17/09/2020

Description

The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:gnu:gcc:*:*:*:*:*:*:*:* 7.5.0 (excluding)
cpe:2.3:a:gnu:gcc:*:*:*:*:*:*:*:* 8.0 (including) 8.4.0 (excluding)
cpe:2.3:a:gnu:gcc:*:*:*:*:*:*:*:* 9.0 (including) 9.3.0 (excluding)
cpe:2.3:a:gnu:gcc:*:*:*:*:*:*:*:* 10.0 (including) 10.1.0 (excluding)
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*