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Elastic APM agent for Ruby vulnerable to Improper Certificate Validation

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Mar 9, 2023

Package

bundler elastic-apm (RubyGems)

Affected versions

< 2.9.0

Patched versions

2.9.0

Description

A TLS certificate validation flaw was found in Elastic APM agent for Ruby versions before 2.9.0. When specifying a trusted server CA certificate via the server_ca_cert setting, the Ruby agent would not properly verify the certificate returned by the APM server. This could result in a man in the middle style attack against the Ruby agent.

References

Published by the National Vulnerability Database Jul 30, 2019
Published to the GitHub Advisory Database May 24, 2022
Reviewed Mar 3, 2023
Last updated Mar 9, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS score

0.087%
(38th percentile)

Weaknesses

CVE ID

CVE-2019-7615

GHSA ID

GHSA-35j2-p8fh-x966

Source code

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