Insufficient Entropy Affecting gcc-9 package, versions <9.2.1-7


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.37% (73rd percentile)

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  • Snyk IDSNYK-DEBIAN11-GCC9-529843
  • published28 Sept 2019
  • 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 Debian:11 gcc-9 to version 9.2.1-7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gcc-9 package and not the gcc-9 package as distributed by Debian. See How to fix? for Debian:11 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