Vulnerability CVE-2019-15847


Published: 2019-09-02

Description:
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.

Type:

CWE-331

(Insufficient Entropy)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
GNU -> GCC 

 References:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481

Copyright 2020, cxsecurity.com

 

Back to Top