CVE-2016-4467: apache qpid_proton Improper Certificate Validation
Vulnerability summary
CVE-2016-4467 is a medium (CVSS 5.9) Improper Certificate Validation vulnerability in apache qpid_proton. EPSS estimates a 1.62% chance of exploitation in the next 30 days, higher than 76.1% of scored vulnerabilities.
Not severe (CVSS 5.9, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Timeline
- 02-05-2017PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The C client and C-based client bindings in the Apache Qpid Proton library before 0.13.1 on Windows do not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when using the SChannel-based security layer, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.62%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.62% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Apache1 product
- qpid_proton0.8.0 | 0.9.0 | 0.9.1 | 0.10.0 | 0.11.0 | 0.11.1 | 0.12.0 | 0.12.1 | 0.12.2 | 0.13.0
1 vendor · 1 product