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Fencer Vulns
medium 5.3

CVE-2014-5277 json

Man-in-the-Middle (MitM)

published 2014-11-17 11 y ago modified 2026-09-10 1 mo ago also GHSA-8w94-cf6g-c8mg , GO-2022-0636 , PYSEC-2014-80 , EUVD-2014-0018

cvss
5.3
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

Docker before 1.3.1 and docker-py before 0.5.3 fall 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.

Patch / fix

  • go github.com/docker/docker 1.3.1
  • pypi docker-py 0.5.3
  • docker.io Debian 14, Debian 13, Debian 12 1.3.1~dfsg1-1

debian advisories DEBIAN-CVE-2014-5277

  • docker.io Ubuntu 14.04 LTS 1.6.2~dfsg1-1ubuntu4~14.04.1

ubuntu advisories UBUNTU-CVE-2014-5277

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • docker-stable SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +12 more 24.0.9_ce-150000.1.25.1
  • docker-stable SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 24.0.9_ce-1.20.1

suse advisories SUSE-SU-2025:03545-1SUSE-SU-2025:03540-1

  • docker-stable openSUSE Tumbleweed 24.0.9_ce-15.1
  • docker openSUSE Tumbleweed 1.12.3-4.1

opensuse advisories openSUSE-SU-2025:15589-1openSUSE-SU-2024:10532-1

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-2014-5277 updated cvss 5.1

docker: fallback to HTTP when HTTPS connections to the registry fail

  • Red Hat Enterprise Linux 7 docker
    affected: no fix available

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

1.87% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
go github.com/docker/docker
<1.3.1
1.3.1
pypi docker-py
<0.5.3
0.5.3

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns 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.