Insufficient Entropy Affecting gcc-8 package, versions <8.3.0-26ubuntu1~18.04


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
3.18% (87th percentile)

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  • Snyk IDSNYK-UBUNTU1804-GCC8-1168600
  • published10 Sept 2020
  • disclosed2 Sept 2019

Introduced: 2 Sep 2019

CVE-2019-15847  (opens in a new tab)
CWE-331  (opens in a new tab)

How to fix?

Upgrade Ubuntu:18.04 gcc-8 to version 8.3.0-26ubuntu1~18.04 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gcc-8 package and not the gcc-8 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 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.

CVSS Base Scores

version 3.1