CVE-2019-10091Network attack vector

Cluster traffic interception via missing SAN verification

Published Mar 16, 2020 · Updated Aug 4, 2024

Improper certificate validation in Apache Geode 1.9.0 allows man-in-the-middle attackers to read or alter intra-cluster traffic. During the TLS handshake, the endpoint-identification path fails to compare the peer hostname with DNS or IP entries in the certificate SAN. Exploitation requires TLS, ssl-endpoint-identification-enabled=true, and a network position from which cluster communications can be intercepted.

CVSS severity7.4
High
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper certificate validation in Apache Geode 1.9.0 allows man-in-the-middle attackers to read or alter intra-cluster traffic. During the TLS handshake, the endpoint-identification path fails to compare the peer hostname with DNS or IP entries in the certificate SAN. Exploitation requires TLS, ssl-endpoint-identification-enabled=true, and a network position from which cluster communications can be intercepted.

The record

CVE
CVE-2019-10091
Published
Mar 16, 2020
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache Geode
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 16, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Apache Tomcat 1.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Geodeversion=Apache Tomcat 1.9.0

Published CVSS scores

7.4NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
4.0NIST NVDAV:N/AC:H/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo