CVE-2017-2623: It was discovered that rpm-ostree and rpm-ostree-client before 2017.3 fail to properly check GPG signatures on

Q: How do I fix CVE-2017-2623?

rpm-ostree: upgrade to 2017.3; rpm-ostree-client: upgrade to 2017.3; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2017-2623 being exploited?

CVE-2017-2623 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-2623 affect?

CVE-2017-2623 affects rpm-ostree, rpm-ostree-client, enterprise linux. Severity is medium (CVSS 5.3). 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

Q: How urgent is CVE-2017-2623?

Priority 39/100. On your watchlist

Routine

MEDIUM 5.3WATCHLISTUPGRADEUPGRADEMITIGATE

CVE-2017-2623 is a medium-severity flaw (CVSS 5.3) affecting rpm-ostree, rpm-ostree-client, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-295
Published	2018-07-27
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: redhat · rpm-ostree

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-07-27 18:29 UTCPublished CVE record published
2026-06-17 01:16 UTCUpdated Record last modified

rpm-ostree rpm-ostree UPGRADE

Affected: < 2017.3

Fixed in: 2017.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy rpm-ostree || rpm -q rpm-ostree || rpm-ostree --version

2. UPGRADE to 2017.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rpm-ostree

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rpm-ostree

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

rpm-ostree rpm-ostree-client UPGRADE

Affected: < 2017.3

Fixed in: 2017.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy rpm-ostree-client || rpm -q rpm-ostree-client || rpm-ostree-client --version

2. UPGRADE to 2017.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rpm-ostree-client

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rpm-ostree-client

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat enterprise linux MITIGATE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-2623?

rpm-ostree: upgrade to 2017.3; rpm-ostree-client: upgrade to 2017.3; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-2623 being exploited?

CVE-2017-2623 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-2623 affect?

CVE-2017-2623 affects rpm-ostree, rpm-ostree-client, enterprise linux. Severity is medium (CVSS 5.3). 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

How urgent is CVE-2017-2623?

Priority 39/100. On your watchlist

Software pages

Red Hat Enterprise Linux vulnerabilities

References

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