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Fencer Intel
medium 6.5

CVE-2016-2166 json

Moderate severity vulnerability that affects org.apache.qpid:proton-j

published 2016-04-12 10 y ago modified 2026-06-17 4 mo ago also GHSA-f5cf-f7px-xpmh , EUVD-2018-0588

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

The (1) proton.reactor.Connector, (2) proton.reactor.Container, and (3) proton.utils.BlockingConnection classes in Apache Qpid Proton before 0.12.1 improperly use an unencrypted connection for an amqps URI scheme when SSL support is unavailable, which might allow man-in-the-middle attackers to obtain sensitive information or modify data via unspecified vectors.

Patch / fix

  • maven org.apache.qpid:proton-j 0.12.1
  • v8 satellite capsule 6.3, satellite 6.3 1:3.14.5.10-19.el7sat
  • tfm satellite capsule 6.3, satellite 6.3 3.2-11.el7sat
  • kobo satellite capsule 6.3, satellite 6.3 0.5.1-1.el7sat
  • gofer satellite capsule 6.3, satellite 6.3 2.7.7-3.el7sat
  • hiera satellite capsule 6.3, satellite 6.3 1.3.1-2.el7sat
  • facter satellite capsule 6.3, satellite 6.3 1:2.4.6-3.el7sat
  • ostree satellite capsule 6.3, satellite 6.3 2017.1-2.atomic.el7
  • puppet satellite capsule 6.3, satellite 6.3 3.8.6-4.el7sat

red hat advisories RHBA-2018:0337

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-2016-2166 updated cvss 4.3

qpid-proton: reactor sends messages in clear if ssl is requested but not available

  • Red Hat Satellite 6.3 tfm 3.2-11.el7sat, kobo 0.5.1-1.el7sat, gofer 2.7.7-3.el7sat, hiera 1.3.1-2.el7sat, SOAPpy 0.11.6-17.el7, facter 2.4.6-3.el7sat, +208 more Red Hat Satellite 6.3 - Puppet 4 puppetserver 2.8.0-1.el7sat, puppet-agent 1.10.9-1.el7sat, puppet-agent-oauth 0.5.1-2.el7sat Red Hat Satellite Capsule 6.3 tfm 3.2-11.el7sat, kobo 0.5.1-1.el7sat, gofer 2.7.7-3.el7sat, hiera 1.3.1-2.el7sat, SOAPpy 0.11.6-17.el7, facter 2.4.6-3.el7sat, +116 more Red Hat Satellite Capsule 6.3 - Puppet 4 puppetserver 2.8.0-1.el7sat, puppet-agent 1.10.9-1.el7sat, puppet-agent-oauth 0.5.1-2.el7sat
    fixed: vendor fix RHBA-2018:0337
  • Red Hat Enterprise Linux OpenStack Platform 6 (Juno) qpid-proton Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) qpid-proton-c, python-qpid-proton Red Hat Enterprise MRG 3 qpid-proton Red Hat OpenStack Platform 8 (Liberty) qpid-proton-c, python-qpid-proton Red Hat Satellite 6 python-qpid-proton
    not affected: vulnerable code not present

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

4.27% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N
GitHub 3.0 6.5 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.qpid:proton-j
<0.12.1
0.12.1

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.