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Insufficient Entropy Affecting libgcc package, versions <0:8.3.1-5.el8

medium

Snyk CVSS

    Attack Complexity Low
    Confidentiality High

    Threat Intelligence

    EPSS 0.18% (55th percentile)
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NVD
7.5 high
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SUSE
6.2 medium
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Red Hat
7.5 high

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  • Snyk ID SNYK-CENTOS8-LIBGCC-2040657
  • published 26 Jul 2021
  • disclosed 2 Sep 2019
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Introduced: 2 Sep 2019

CVE-2019-15847 Open this link in a new tab
CWE-331 Open this link in a new tab

How to fix?

Upgrade Centos:8 libgcc to version 0:8.3.1-5.el8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcc package and not the libgcc package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

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.