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Vulnerability Assessment

Impact

CVSS score of 7.4 (HIGH). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 6.2% exploitation probability (EPSS)

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AnalysisAI

While investigating bug PROTON-2014, we discovered that under some circumstances Apache Qpid Proton versions 0.9 to 0.27.0 (C library and its language bindings) can connect to a peer anonymously. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

While investigating bug PROTON-2014, we discovered that under some circumstances Apache Qpid Proton versions 0.9 to 0.27.0 (C library and its language bindings) can connect to a peer anonymously using TLS *even when configured to verify the peer certificate* while used with OpenSSL versions before 1.1.0. This means that an undetected man in the middle attack could be constructed if an attacker can arrange to intercept TLS traffic. Affected products include: Apache Qpid, Redhat Jboss Amq Clients 2, Redhat Openstack, Redhat Satellite, Redhat Enterprise Linux Desktop. Version information: before 1.1.0..

Severity by source

NVD PRIMARY 7.4 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

DescriptionNVD

While investigating bug PROTON-2014, we discovered that under some circumstances Apache Qpid Proton versions 0.9 to 0.27.0 (C library and its language bindings) can connect to a peer anonymously using TLS *even when configured to verify the peer certificate* while used with OpenSSL versions before 1.1.0. This means that an undetected man in the middle attack could be constructed if an attacker can arrange to intercept TLS traffic.

Threat Intelligence Overview

EPSS Score
6.2%
Top 7% exploitable
Data Quality
2 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 6.2%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

43
Low Medium High Critical
KEV: 0
EPSS: +6
CVSS: +37
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:a:apache:qpid:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_amq_clients_2:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:14:*:*:*:*:*:*:*
cpe:2.3:a:redhat:satellite:6.3:*:*:*:*:*:*:*
cpe:2.3:a:redhat:satellite:6.4:*:*:*:*:*:*:*
cpe:2.3:a:redhat:satellite:6.5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:6.7:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.2:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:5.9:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:6.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*
+ 11 more

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Same technique Information Disclosure

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CVE-2019-2725 CRITICAL POC
9.8
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9.0
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9.8
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9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

References

Advisories & patches
ADVISORY https://issues.apache.org/jira/browse/PROTON-2014?page=com.atlassian.jira.plugin.system.issuetabpanels%3Aall-tabpanel REF http://www.openwall.com/lists/oss-security/2019/04/23/4 REF http://www.securityfocus.com/bid/108044 REF https://access.redhat.com/errata/RHSA-2019:0886 REF https://access.redhat.com/errata/RHSA-2019:1398 REF https://access.redhat.com/errata/RHSA-2019:1399 REF https://access.redhat.com/errata/RHSA-2019:1400 REF https://access.redhat.com/errata/RHSA-2019:2777 REF https://access.redhat.com/errata/RHSA-2019:2778 REF https://access.redhat.com/errata/RHSA-2019:2779 REF https://access.redhat.com/errata/RHSA-2019:2780 REF https://access.redhat.com/errata/RHSA-2019:2781 REF https://access.redhat.com/errata/RHSA-2019:2782 REF https://lists.apache.org/thread.html/008ee5e78e5a090e1fcc5f6617f425e4e51d59f03d3eda2dd006df9f%40%3Cusers.qpid.apache.org%3E REF https://lists.apache.org/thread.html/3adb2f020f705b4fd453982992a68cd10f9d5ac728b699efdb73c1f5%40%3Cdev.qpid.apache.org%3E REF https://lists.apache.org/thread.html/49c83f0acce5ceaeffca51714ec2ba0f0199bcb8f99167181bba441b%40%3Cdev.qpid.apache.org%3E REF https://lists.apache.org/thread.html/914424e4d798a340f523b6169aaf39b626971d9bb00fcdeb1d5d6c0d%40%3Ccommits.qpid.apache.org%3E REF https://lists.apache.org/thread.html/d9c9a882a292e2defaed1f954528c916fb64497ce57db652727e39b0%40%3Cannounce.apache.org%3E

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