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Fencer Intel
medium 5.3

CVE-2017-2623 json

It was discovered that rpm-ostree and rpm-ostree-client before 2017.3 fail to properly check GPG signatures on packages when doing layering.

published 2018-07-27 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-11784

cvss
5.3
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

It was discovered that rpm-ostree and rpm-ostree-client before 2017.3 fail to properly check GPG signatures on packages when doing layering. Packages with unsigned or badly signed content could fail to be rejected as expected. This issue is partially mitigated on RHEL Atomic Host, where certificate pinning is used by default.

Patch / fix

  • rpm-ostree rpm-ostree 2017.3
  • rpm-ostree rpm-ostree-client 2017.3
  • rpm-ostree RHEL 7 ATOMIC 2017.1-5.atomic.el7
  • rpm-ostree-client RHEL 7 ATOMIC 2017.1-6.atomic.el7

red hat advisories RHSA-2017:0444

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-2623 updated cvss 5.3

rpm-ostree-client: fails to check gpg package signatures when layering

  • Red Hat Enterprise Linux Atomic Host 7 rpm-ostree 2017.1-5.atomic.el7, rpm-ostree-client 2017.1-6.atomic.el7
    fixed: vendor fix “This issue is partially mitigated on RHEL Atomic Host, where default certificate pinning ensures provenance.” RHSA-2017:0444

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.01% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.3 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Project Atomic rpm-ostree,

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.