CVE-2014-5277

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.

Published: 2014-11-17 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-5277 is rated Moderate Risk (44.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.70%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2014-5277

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-04-05 1.01% 0.70% -0.31%
2 2025-03-30 10.27% 1.01% -9.25%
3 2025-03-29 — 10.27% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-5277

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2014-5277

GitHub Security Advisory for CVE-2014-5277

OS Trackers for CVE-2014-5277

vendor priority summary link
debian not yet assigned CVE-2014-5277 not yet assigned priority: Debian including 1 source packages (docker.io), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2014-5277
redhat medium — https://access.redhat.com/security/cve/CVE-2014-5277
suse medium — https://www.suse.com/security/cve/CVE-2014-5277/
ubuntu medium CVE-2014-5277 medium priority: Ubuntu including 1 source packages (docker.io), 10 status rows across 10 suites (lucid, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 5, DNE 2, released 2, ignored 1. https://ubuntu.com/security/CVE-2014-5277

Affected software / configurations for CVE-2014-5277

Vendor Product Version Raw CPE
docker docker <= 1.3.0 cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:*
docker docker-py <= 0.5.3 cpe:2.3:a:docker:docker-py:*:*:*:*:*:*:*:*

References for CVE-2014-5277

cvelogic Threat Intelligence