How severe is CVE-2015-1843?

CVE-2015-1843 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-1843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-1843?

CVE-2015-1843 affects Redhat Docker. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-1843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-1843 published?

CVE-2015-1843 was published on 2015-04-06 and last updated on 2026-06-17.

CVE-2015-1843

CVE-2015-1843 is a medium-severity vulnerability in Redhat Docker with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Redhat Docker
Published: 2015-04-06
Last modified: 2026-06-17

Description

The Red Hat docker package before 1.5.0-28, when using the --add-registry option, falls back to HTTP when the HTTPS connection to the registry fails, which allows man-in-the-middle attackers to conduct downgrade attacks and obtain authentication and image data by leveraging a network position between the client and the registry to block HTTPS traffic. NOTE: this vulnerability exists because of a CVE-2014-5277 regression.

Frequently asked questions

What is CVE-2015-1843?: The Red Hat docker package before 1.5.0-28, when using the --add-registry option, falls back to HTTP when the HTTPS connection to the registry fails, which allows man-in-the-middle attackers to conduct downgrade attacks and obtain authentication and image data by leveraging a network position between the client and the registry to block HTTPS traffic. NOTE: this vulnerability exists because of a CVE-2014-5277 regression.
How severe is CVE-2015-1843?: CVE-2015-1843 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-1843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-1843?: CVE-2015-1843 affects Redhat Docker. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-1843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-1843 published?: CVE-2015-1843 was published on 2015-04-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:docker:*:*:*:*:*:*:*:*

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