Insufficient Entropy The advisory has been revoked - it doesn't affect any version of package gcc7-go (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-SLES151-GCC7GO-2730552
- published14 Apr 2022
- disclosed16 Oct 2019
Introduced: 16 Oct 2019
CVE-2019-15847 (opens in a new tab)Amendment
The SLES security team deemed this advisory irrelevant for SLES:15.1.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gcc7-go package and not the gcc7-go package as distributed by SLES.
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.
References
- https://www.suse.com/security/cve/CVE-2019-15847.html
- https://bugzilla.suse.com/1149145
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html
- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481