THREATPORT/VULNERABILITY/CVE-2019-15847
HIGH SEVERITY

CVE-2019-15847

Gcc vulnerability

CVSS
7.5
EPSS
3.2%
EPSS pct
87th
Exploited
No known
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 vendor
Gnu
Affected product
Gcc
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness type (CWE)
Published
2019-09-02

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 3.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2019-15847

  • Confirm whether Gnu Gcc is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-15847.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-15847

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-15847 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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