Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Affecting gcc-4.8 package, versions *

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Overview

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.

References

CVSS Score

4.0
medium severity
  • Attack Vector
    Local
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    Low
  • Integrity
    None
  • Availability
    None
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVE
CVE-2017-11671
CWE
CWE-338
Snyk ID
SNYK-DEBIAN8-GCC48-309214
Disclosed
26 Jul, 2017
Published
26 Jul, 2017