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Improper Certificate Validation in EM-HTTP-Request

High severity GitHub Reviewed Published May 24, 2021 to the GitHub Advisory Database • Updated Aug 17, 2023

Package

bundler em-http-request (RubyGems)

Affected versions

<= 1.1.5

Patched versions

1.1.6

Description

EM-HTTP-Request 1.1.5 uses the library eventmachine in an insecure way that allows an attacker to perform a man-in-the-middle attack against users of the library. The hostname in a TLS server certificate is not verified.

References

Published by the National Vulnerability Database May 25, 2020
Reviewed May 14, 2021
Published to the GitHub Advisory Database May 24, 2021
Last updated Aug 17, 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

0.092%
(40th percentile)

Weaknesses

CVE ID

CVE-2020-13482

GHSA ID

GHSA-q27f-v3r6-9v77

Source code

Credits

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