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Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) Affecting gcc-5 package, versions <5.4.0-6ubuntu1~16.04.12+esm2

low

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.16% (52nd percentile)
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NVD
4 medium
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Red Hat
5.6 medium

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  • Snyk ID SNYK-UBUNTU1604-GCC5-1214286
  • published 10 Sep 2020
  • disclosed 26 Jul 2017
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Introduced: 26 Jul 2017

CVE-2017-11671 Open this link in a new tab
CWE-338 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 gcc-5 to version 5.4.0-6ubuntu1~16.04.12+esm2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gcc-5 package and not the gcc-5 package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

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.