CVEvulnerability
CVE-2019-15847
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2019-09-02
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-331
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.
Affected configurations
• gnu gcc (< 7.5.0)
• gnu gcc (>= 8.0 < 8.4.0)
• gnu gcc (>= 9.0 < 9.3.0)
• gnu gcc (>= 10.0 < 10.1.0)
• opensuse leap 15.0
• opensuse leap 15.1
Related
Weakness · CWE (1)
- CWE-331 Insufficient Entropy weakness
References
- 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
- 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
- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481 Issue Tracking, Vendor Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html cert-portal.siemens.com