CVE-2019-15847

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 v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481	Issue Tracking Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html	Mailing List Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gnu:gcc::::::::
	cpe:2.3:a:gnu:gcc::::::::
	cpe:2.3:a:gnu:gcc::::::::
	cpe:2.3:a:gnu:gcc::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:opensuse:leap:15.0:::::::*
	cpe:2.3:o:opensuse:leap:15.1:::::::*

Information

Published : 2019-09-02 16:15

Updated : 2020-09-17 06:38

NVD link : CVE-2019-15847

Mitre link : CVE-2019-15847

JSON object : View

CWE

CWE-331

Insufficient Entropy

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Products Affected

gnu

gcc

opensuse

leap

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