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CVE-2019-15847

Date: September 2, 2019

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.

Language: C

Severity Score

Related Resources (10)

https://nvd.nist.gov/vuln/detail/CVE-2019-15847
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-15847
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html
https://security.alpinelinux.org/vuln/CVE-2019-15847
https://security-tracker.debian.org/tracker/CVE-2019-15847
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481
https://access.redhat.com/security/cve/CVE-2019-15847
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html
https://www.mend.io/vulnerability-database/CVE-2019-15847

Severity Score

Weakness Type (CWE)

Insufficient Entropy

CWE-331

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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